From personal_submersibles at psubs.org Tue Dec 1 05:04:34 2020 From: personal_submersibles at psubs.org (hank pronk via Personal_Submersibles) Date: Tue, 1 Dec 2020 10:04:34 +0000 (UTC) Subject: [PSUBS-MAILIST] strain relief In-Reply-To: References: Message-ID: <117716106.3117585.1606817074942@mail.yahoo.com> Rick, I just did a google search on how well nickel stands up to salt water. ?Turns out, it is good. ?I am sure SS is better of coarse, butthe reality of owning a P Sub is, they are not in the water much. ?I assume you are asking because they are a lot cheaper. ?Another realityof owning a Psub, they are expensive. ?I assume you will be putting sacrificial anodes on the hull. ?I would use them and keep an eye on them. ?I admit, I am not as concerned about this as others, that is because I am spoiled in fresh water. ?Hank On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via Personal_Submersibles wrote: I was wondering if it was OK to use a nickel plated brass strain relief fitting to pass a cable through?Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 1 12:04:14 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Tue, 1 Dec 2020 17:04:14 +0000 (UTC) Subject: [PSUBS-MAILIST] Sensor calibration In-Reply-To: References: Message-ID: <1786113948.3242364.1606842254571@mail.yahoo.com> Good stuff, Sean, asusual.? I should not have used the word calibrate in regards to setting agalvanic sensor according to the Luminox, for all the reasons you stated. Accurate calibration asyou have described is not without its own potential pitfalls. ?How accurate is the accuracy of the testinginstruments?? That 100% O2 bottle you are going to use for calibration,how pure is it, and how do you know?? Did you flow enough gas over thesensor for a long enough period to get it to stabilize?? Did you calibrate that sensor in alaboratory, your kitchen counter top, or the tailgate of your truck? In lieu of carrying aroundextra bottles of testing gas, I think one way we can mitigate instrumentationerror is to simply not push our instruments to their limits whether analog ordigital, set conservative operational parameters, and purchase sensors withfull scale range near those chosen parameters.? For example, does a 10% totalerror on a 5000ppm CO2 sensor matter much if your operational requirement is tosurface when the gas level reaches 4000ppm??Probably not.? However, that same10% error on a 100,000ppm CO2 sensor would make that sensor unusable for ourpurposes.? As well, there?s no need for a0-100% O2 sensor if your operating parameters require surfacing at 25%.? At actual 21% O2, the nominal +/-2% error ofa galvanic O2 sensor provides a potential reporting span of 19-23%.? That would be outside my personal operatingparameters of 19.5 ? 23.5.? The samenominal error on a 25% O2 sensor only results in a potential reporting span of20.5-21.5 for the same 21% environment. Regardless of all thesevariables, I think we have to approach instrumentation from the perspective of practicalityfor a particular application.? Would Iuse a $99 O2 sensor if I were diving into the Marianas Trench?? No, butfor an hour at 100-300 feet in a lake, yes, it's good enough.? Is singlepoint in-air calibration of a CO2 or O2 sensor the best method of reducing thesensor error band?? No, but in my opinionit?s a much better option than relying on your body to sense stale air or observingchanges of an analog pressure gauge and attributing those changes to PpO2. Jon On Friday, November 27, 2020, 03:48:17 PM EST, Sean T. Stevenson via Personal_Submersibles wrote: I just thought I would share a couple of thoughts regarding calibration, because I noted Jon mentioning possibly using a sensor with a 25% range to calibrate a galvanic sensor with greater range, and while you might be able to get in the ballpark for a linear calibration factor, strictly speaking this is not a proper calibration. In general, the range of your calibration standard should always match or exceed the range of the device you are calibrating, for a couple of reasons. The first is that while extrapolating a linear factor can indeed produce a reasonable slope estimate, you lose the ability to generate linearization data via lookup tables or polynomial corrections that are applicable within the calibration range once that range is exceeded. The second is that absolute error may be proportional to reading, but may also increase in the domain beyond the calibration range, and you are then unable to characterize this error in the extrapolated region. Calibrating one sensor against another one is subject to the accumulated maximum error of both, and while it may indeed be possible to obtain a very high accuracy calibrated sensor for use as a calibration standard, the more accessible standard for an oxygen concentration calibration outside of the laboratory is to use gases of known concentration at extremely high accuracy, and the easiest and most accessible standards to use are 100% inert gas (0% oxygen), dry atmospheric air (20.95% oxygen), and of course, 100% oxygen, because these are not subject to any sensor error. This gives you a three point calibration which, in contrast to a two point, will also provide some estimate of error in the regression, because the three points will never be perfectly in line. That error, in turn, can be considered the minimum error apparent in any two-point calibration performed within a lesser range using the first sensor as the calibration standard, and of course the second sensor can also be independently calibrated against appropriate gases at two points within its range, just using the comparison against the other sensor to establish error bounds. With CO2, in the absence of a custom reference standard calibration gas, you are limited to two point calibrations using oxygen or inert gas for 0 ppm, and atmospheric air for (as of today) 414 ppm. Again, for sub use you need to measure up to 5000 ppm, so this is technically not a proper calibration, because it extrapolates. To properly calibrate this sensor would require sourcing a certified high accuracy reference standard calibration gas, ideally at 5000 ppm CO2, so that your sensor calibration is entirely within the range of the calibration standard, and the three point calibration again provides you with an estimate of minimum error in the measurement. This may not matter to most of you /us, but I point it out just for the sake of information. It is always good to be aware of the limitations of measurements. An instrument which reads to three decimal places can instill false confidence in its accuracy if the error in that measurement is on the order of the first or second. Sean _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 1 12:33:05 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 1 Dec 2020 07:33:05 -1000 Subject: [PSUBS-MAILIST] strain relief In-Reply-To: <117716106.3117585.1606817074942@mail.yahoo.com> References: <117716106.3117585.1606817074942@mail.yahoo.com> Message-ID: Hank No, cost wasn't the factor, it was that I can't find a vendor who makes the fitting in the 1/4" NPT size ss fitting that I had machined and welded into the front dome years ago. 3/8" is the smallest that vendors go down to. All my fittings that accept a strain relief fitting except the two in the front are 1/2". I'll have to go back threw the prints to see where I would of gotten the 1/4" from as I know I wouldn't of just pulled it out of the air. My preference now would be a blue globe fitting as they can take much more pressure but they are made by a German company and only offered in Metric and all my existing threw hulls are a standard NPT thread. Rick On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, I just did a google search on how well nickel stands up to salt > water. Turns out, it is good. I am sure SS is better of coarse, but > the reality of owning a P Sub is, they are not in the water much. I > assume you are asking because they are a lot cheaper. Another reality > of owning a Psub, they are expensive. I assume you will be putting > sacrificial anodes on the hull. I would use them and keep an eye on them. > I admit, I am not as concerned about this as others, that is because I am > spoiled in fresh water. > Hank > On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via > Personal_Submersibles wrote: > > > I was wondering if it was OK to use a nickel plated brass strain relief > fitting to pass a cable through? > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 1 19:53:29 2020 From: personal_submersibles at psubs.org (hank pronk via Personal_Submersibles) Date: Wed, 2 Dec 2020 00:53:29 +0000 (UTC) Subject: [PSUBS-MAILIST] strain relief In-Reply-To: References: <117716106.3117585.1606817074942@mail.yahoo.com> Message-ID: <2127165380.3403694.1606870409653@mail.yahoo.com> Rick,?Drill them out to the closest size and thread them to metric.Hank On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via Personal_Submersibles wrote: Hank No, cost wasn't the factor, it was that I can't find a vendor who makes the fitting in the 1/4" NPT size ss fitting that I had machined and welded into the front dome years ago. 3/8" is the smallest that vendors go down to. All my fittings that accept a strain relief fitting except the two in the front are 1/2". I'll have to go back threw the prints to see where I would of gotten the 1/4" from as I know I wouldn't of just pulled it out of the air. My preference?now would be a blue globe fitting as they can take much more pressure but they are made by a German company and only offered in Metric and all my existing threw hulls are a standard NPT thread.Rick On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles wrote: Rick, I just did a google search on how well nickel stands up to salt water.? Turns out, it is good.? I am sure SS is better of coarse, butthe reality of owning a P Sub is, they are not in the water much.? I assume you are asking because they are a lot cheaper.? Another realityof owning a Psub, they are expensive.? I assume you will be putting sacrificial anodes on the hull.? I would use them and keep an eye on them.? I admit, I am not as concerned about this as others, that is because I am spoiled in fresh water. ?Hank On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via Personal_Submersibles wrote: I was wondering if it was OK to use a nickel plated brass strain relief fitting to pass a cable through?Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 1 20:50:44 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 1 Dec 2020 15:50:44 -1000 Subject: [PSUBS-MAILIST] strain relief In-Reply-To: <2127165380.3403694.1606870409653@mail.yahoo.com> References: <117716106.3117585.1606817074942@mail.yahoo.com> <2127165380.3403694.1606870409653@mail.yahoo.com> Message-ID: Hank If I could put the fittings in a vice or milling machine, it would be a no brainer but these are already welded into the hull and so would have to be drilled out free hand with an electric 1/2" drill motor and I broke a finger trying to enlarge a hole as the bit stopped and the motor kept spinning and I wasn't able to let go of it fast enough. Gonna pressure test the ones I have to see at what point they extrude the wire but I still have to either drill out and re tap like you say or have a metric fitting welded to the existing fittings that are already in the sub. Rick On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > Drill them out to the closest size and thread them to metric. > Hank > > On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via > Personal_Submersibles wrote: > > > Hank > > No, cost wasn't the factor, it was that I can't find a vendor who makes > the fitting in the 1/4" NPT size ss fitting that I had machined and welded > into the front dome years ago. 3/8" is the smallest that vendors go down > to. All my fittings that accept a strain relief fitting except the two in > the front are 1/2". I'll have to go back threw the prints to see where I > would of gotten the 1/4" from as I know I wouldn't of just pulled it out of > the air. My preference now would be a blue globe fitting as they can take > much more pressure but they are made by a German company and only offered > in Metric and all my existing threw hulls are a standard NPT thread. > Rick > > On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, I just did a google search on how well nickel stands up to salt > water. Turns out, it is good. I am sure SS is better of coarse, but > the reality of owning a P Sub is, they are not in the water much. I > assume you are asking because they are a lot cheaper. Another reality > of owning a Psub, they are expensive. I assume you will be putting > sacrificial anodes on the hull. I would use them and keep an eye on them. > I admit, I am not as concerned about this as others, that is because I am > spoiled in fresh water. > Hank > On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via > Personal_Submersibles wrote: > > > I was wondering if it was OK to use a nickel plated brass strain relief > fitting to pass a cable through? > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 1 22:24:12 2020 From: personal_submersibles at psubs.org (hank pronk via Personal_Submersibles) Date: Wed, 2 Dec 2020 03:24:12 +0000 (UTC) Subject: [PSUBS-MAILIST] strain relief In-Reply-To: References: <117716106.3117585.1606817074942@mail.yahoo.com> <2127165380.3403694.1606870409653@mail.yahoo.com> Message-ID: <1780649980.3443313.1606879452118@mail.yahoo.com> Rick,I use a cordless drill for that stuff, because I can hold it back from twisting out of my hands.Hank On Tuesday, December 1, 2020, 6:51:12 PM MST, Rick Patton via Personal_Submersibles wrote: Hank If I could put the fittings in a vice or milling machine, it would be a no brainer but these are already welded into the hull and so would have to be drilled out free hand with an electric 1/2" drill motor and I broke a finger trying to enlarge a hole as the bit stopped and the motor kept spinning and I wasn't able to let go of it fast enough. Gonna pressure test the ones I have to see at what point they extrude the wire but I still have to either drill out and re tap like you say or have a metric fitting welded to the existing fittings that are already in the sub.? Rick? On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles wrote: Rick,?Drill them out to the closest size and thread them to metric.Hank On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via Personal_Submersibles wrote: Hank No, cost wasn't the factor, it was that I can't find a vendor who makes the fitting in the 1/4" NPT size ss fitting that I had machined and welded into the front dome years ago. 3/8" is the smallest that vendors go down to. All my fittings that accept a strain relief fitting except the two in the front are 1/2". I'll have to go back threw the prints to see where I would of gotten the 1/4" from as I know I wouldn't of just pulled it out of the air. My preference?now would be a blue globe fitting as they can take much more pressure but they are made by a German company and only offered in Metric and all my existing threw hulls are a standard NPT thread.Rick On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles wrote: Rick, I just did a google search on how well nickel stands up to salt water.? Turns out, it is good.? I am sure SS is better of coarse, butthe reality of owning a P Sub is, they are not in the water much.? I assume you are asking because they are a lot cheaper.? Another realityof owning a Psub, they are expensive.? I assume you will be putting sacrificial anodes on the hull.? I would use them and keep an eye on them.? I admit, I am not as concerned about this as others, that is because I am spoiled in fresh water. ?Hank On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via Personal_Submersibles wrote: I was wondering if it was OK to use a nickel plated brass strain relief fitting to pass a cable through?Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 2 00:44:10 2020 From: personal_submersibles at psubs.org (Alan via Personal_Submersibles) Date: Wed, 2 Dec 2020 18:44:10 +1300 Subject: [PSUBS-MAILIST] Fwd: Transducer Depth References: Message-ID: Jon & all, I sent a query to OTS regarding transducer depth for the STX-101 that Jon was doing work on. The reply (below) says the boat transducer is the same as the diver unit ( however David showed them to be different sizes) & is depth rated to 500ft. They suggest other options also. Alan Begin forwarded message: > From: "Service (OTS)" > Date: 2 December 2020 at 9:52:43 AM NZDT > To: Alan > Subject: RE: Transducer Depth > > Hello Alan, > > To answer the questions you posed, the transducers are the same and the transducer itself would be able to survive the same depth as the diver units, 500 feet. > > A more suitable option for them may be either using the hull mounted transducer, the TA-32M, if they want to stay with the STX-101 or by looking into the Bell-200 system. Links for the product pages to both are listed below. You can also reach out to our sales team for more information on these options. > https://www.oceantechnologysystems.com/store/transducer-assemblies/ta-32m-hull-mounted-transducer-assembly/ > https://www.oceantechnologysystems.com/store/military/wireless-military/aquacom174-bell-200-backup-system/ > > If you have any questions, please give us a call at the numbers that you can find below or just reply to this e-mail. > > Best regards, > Noah Fujioka > > Service Coordinator and Technical Support > Undersea Systems International > dba Ocean Technology Systems > Service Department > 3133 W. Harvard St. > Santa Ana, CA 92704 > 1 (800) 550-1984 Ext. 131 > 1 (714) 754-7848 Ext. 131service > 1 (714) 966-1639 (Fax) > www.oceantechnologysystems.com > > From: Ocean Technology Systems > Sent: Tuesday, November 24, 2020 11:13 AM > To: Service (OTS) > Subject: FW: Transducer Depth > > > > Regards, > Yasmeen Jarrar > Undersea Systems International, Inc. > dba Ocean Technology Systems > 3133 W. Harvard Street > Santa Ana, CA 92704 > Toll Free (714) 754-7848 > Fax (714) 966-1639 > > > From: Alan > Sent: Tuesday, November 24, 2020 10:58 AM > To: Ocean Technology Systems > Subject: Transducer Depth > > Hi, > I am with a World wide group of submarine builders (psubs.org) who are using OTS > wireless communication systems on our submersibles. > One of our members is converting a STX-101 portable surface station unit for use > inside the sub. This would require mounting the surface station transducer outside > the pressure hull. > My question is; are the surface station transducers as robust as the transducers on > the diver units? > Any estimates on their maximum depth? > I see they can at least go down to 100ft ( length of transducer cable). > Kind regards > Alan James (New Zealand) -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.gif Type: image/gif Size: 5646 bytes Desc: not available URL: From personal_submersibles at psubs.org Wed Dec 2 12:37:53 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Wed, 2 Dec 2020 07:37:53 -1000 Subject: [PSUBS-MAILIST] strain relief In-Reply-To: <1780649980.3443313.1606879452118@mail.yahoo.com> References: <117716106.3117585.1606817074942@mail.yahoo.com> <2127165380.3403694.1606870409653@mail.yahoo.com> <1780649980.3443313.1606879452118@mail.yahoo.com> Message-ID: I was curious on what made me go with a 1/2" standard NPT female thread for passing all electrical wires thru the hull and using a Subcon strain relief fitting as I knew I wouldn't of just pulled it out of the air and I saw on the K-350 blue prints a couple of fittings that were called out as a 1/2" NPT male thread using a SS schedule 80 nipple. These were to blow down the MBT's and not for any electrical penetrators and there was a thread a long time ago where Subcon popped up so I went to them to order the fittings without doing my homework and asking what they were rated at. Rather than drill them all out and re tap for metric, I will get my local machine shop to make some short ss pieces just long enough to take a blue globe fitting and then weld them on the outside of all my thru hulls to change them over. Rick On Tue, Dec 1, 2020 at 5:25 PM hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > I use a cordless drill for that stuff, because I can hold it back from > twisting out of my hands. > Hank > > On Tuesday, December 1, 2020, 6:51:12 PM MST, Rick Patton via > Personal_Submersibles wrote: > > > Hank > > If I could put the fittings in a vice or milling machine, it would be a no > brainer but these are already welded into the hull and so would have to be > drilled out free hand with an electric 1/2" drill motor and I broke a > finger trying to enlarge a hole as the bit stopped and the motor kept > spinning and I wasn't able to let go of it fast enough. Gonna pressure test > the ones I have to see at what point they extrude the wire but I still have > to either drill out and re tap like you say or have a metric fitting welded > to the existing fittings that are already in the sub. > > Rick > > On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, > Drill them out to the closest size and thread them to metric. > Hank > > On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via > Personal_Submersibles wrote: > > > Hank > > No, cost wasn't the factor, it was that I can't find a vendor who makes > the fitting in the 1/4" NPT size ss fitting that I had machined and welded > into the front dome years ago. 3/8" is the smallest that vendors go down > to. All my fittings that accept a strain relief fitting except the two in > the front are 1/2". I'll have to go back threw the prints to see where I > would of gotten the 1/4" from as I know I wouldn't of just pulled it out of > the air. My preference now would be a blue globe fitting as they can take > much more pressure but they are made by a German company and only offered > in Metric and all my existing threw hulls are a standard NPT thread. > Rick > > On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, I just did a google search on how well nickel stands up to salt > water. Turns out, it is good. I am sure SS is better of coarse, but > the reality of owning a P Sub is, they are not in the water much. I > assume you are asking because they are a lot cheaper. Another reality > of owning a Psub, they are expensive. I assume you will be putting > sacrificial anodes on the hull. I would use them and keep an eye on them. > I admit, I am not as concerned about this as others, that is because I am > spoiled in fresh water. > Hank > On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via > Personal_Submersibles wrote: > > > I was wondering if it was OK to use a nickel plated brass strain relief > fitting to pass a cable through? > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 2 12:44:38 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Wed, 2 Dec 2020 17:44:38 +0000 (UTC) Subject: [PSUBS-MAILIST] Fwd: Transducer Depth In-Reply-To: References: Message-ID: <1505616048.3676525.1606931078169@mail.yahoo.com> Alan, $1649 for the transducer$3899 for the Bell-200 I'm sure I'll be sticking with the STX-101. Jon On Wednesday, December 2, 2020, 12:46:15 AM EST, Alan via Personal_Submersibles wrote: Jon & all,I sent a query to OTS regarding transducer depth for the STX-101 that Jonwas doing work on.?The reply (below) says the boat transducer is the same as the diver unit ( however David showed them to be different sizes) & is depth rated to 500ft.They suggest other options also.AlanBegin forwarded message: From: "Service (OTS)" Date: 2 December 2020 at 9:52:43 AM NZDT To: Alan Subject: RE: Transducer Depth Hello Alan, ? To answer the questions you posed, the transducers are the same and the transducer itself would be able to survive the same depth as the diver units, 500 feet. ? A more suitable option for them may be either using the hull mounted transducer, the TA-32M, if they want to stay with the STX-101 or by looking into the Bell-200 system. Links for the product pages to both are listed below. You can also reach out to our sales team for more information on these options. https://www.oceantechnologysystems.com/store/transducer-assemblies/ta-32m-hull-mounted-transducer-assembly/ https://www.oceantechnologysystems.com/store/military/wireless-military/aquacom174-bell-200-backup-system/ ? If you have any questions, please give us a call at the numbers that you can find below or just reply to this e-mail. ? Best regards, Noah Fujioka ? Service Coordinator and Technical Support Undersea Systems International ?? dba Ocean Technology Systems? Service Department 3133 W.?Harvard St. Santa Ana, CA 92704 1 (800) 550-1984 Ext. 131 1 (714) 754-7848?Ext. 131service 1 (714) 966-1639 (Fax) www.oceantechnologysystems.com ? From: Ocean Technology Systems Sent: Tuesday, November 24, 2020 11:13 AM To: Service (OTS) Subject: FW: Transducer Depth ? ? ? Regards, Yasmeen Jarrar Undersea Systems International, Inc. dba Ocean Technology Systems 3133 W. Harvard Street Santa Ana, CA 92704 Toll Free (714) 754-7848? Fax (714) 966-1639 ? From: Alan Sent: Tuesday, November 24, 2020 10:58 AM To: Ocean Technology Systems Subject: Transducer Depth ? Hi, I am with a World wide group of submarine builders (psubs.org) who are using OTS? wireless communication systems on our submersibles. One of our members is converting a STX-101 portable surface station unit for use? inside the sub. This would require mounting the surface station transducer outside the pressure hull. My question is; are the surface station transducers as robust as the transducers on the diver units? Any estimates on their maximum depth? I see they can at least go down to 100ft ( length of transducer cable). Kind regards Alan James (New Zealand) _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.gif Type: image/gif Size: 5646 bytes Desc: not available URL: From personal_submersibles at psubs.org Wed Dec 2 14:56:02 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Wed, 2 Dec 2020 19:56:02 +0000 (UTC) Subject: [PSUBS-MAILIST] Fwd: Transducer Depth In-Reply-To: <1505616048.3676525.1606931078169@mail.yahoo.com> References: <1505616048.3676525.1606931078169@mail.yahoo.com> Message-ID: <499202993.3735964.1606938962797@mail.yahoo.com> Hi Jon,?yes expensive options.?Was just needing confirmation that your STX-101 hack would work for me at a 500ft depth.?I had questioned OTS in the past on other issues and hadn't got a reply, but found sending the same email several times over a couple of weeks worked!?Alan On Thursday, December 3, 2020, 06:46:27 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: Alan, $1649 for the transducer$3899 for the Bell-200 I'm sure I'll be sticking with the STX-101. Jon On Wednesday, December 2, 2020, 12:46:15 AM EST, Alan via Personal_Submersibles wrote: Jon & all,I sent a query to OTS regarding transducer depth for the STX-101 that Jonwas doing work on.?The reply (below) says the boat transducer is the same as the diver unit ( however David showed them to be different sizes) & is depth rated to 500ft.They suggest other options also.AlanBegin forwarded message: From: "Service (OTS)" Date: 2 December 2020 at 9:52:43 AM NZDT To: Alan Subject: RE: Transducer Depth Hello Alan, ? To answer the questions you posed, the transducers are the same and the transducer itself would be able to survive the same depth as the diver units, 500 feet. ? A more suitable option for them may be either using the hull mounted transducer, the TA-32M, if they want to stay with the STX-101 or by looking into the Bell-200 system. Links for the product pages to both are listed below. You can also reach out to our sales team for more information on these options. https://www.oceantechnologysystems.com/store/transducer-assemblies/ta-32m-hull-mounted-transducer-assembly/ https://www.oceantechnologysystems.com/store/military/wireless-military/aquacom174-bell-200-backup-system/ ? If you have any questions, please give us a call at the numbers that you can find below or just reply to this e-mail. ? Best regards, Noah Fujioka ? Service Coordinator and Technical Support Undersea Systems International ?? dba Ocean Technology Systems? Service Department 3133 W.?Harvard St. Santa Ana, CA 92704 1 (800) 550-1984 Ext. 131 1 (714) 754-7848?Ext. 131service 1 (714) 966-1639 (Fax) www.oceantechnologysystems.com ? From: Ocean Technology Systems Sent: Tuesday, November 24, 2020 11:13 AM To: Service (OTS) Subject: FW: Transducer Depth ? ? ? Regards, Yasmeen Jarrar Undersea Systems International, Inc. dba Ocean Technology Systems 3133 W. Harvard Street Santa Ana, CA 92704 Toll Free (714) 754-7848? Fax (714) 966-1639 ? From: Alan Sent: Tuesday, November 24, 2020 10:58 AM To: Ocean Technology Systems Subject: Transducer Depth ? Hi, I am with a World wide group of submarine builders (psubs.org) who are using OTS? wireless communication systems on our submersibles. One of our members is converting a STX-101 portable surface station unit for use? inside the sub. This would require mounting the surface station transducer outside the pressure hull. My question is; are the surface station transducers as robust as the transducers on the diver units? Any estimates on their maximum depth? I see they can at least go down to 100ft ( length of transducer cable). Kind regards Alan James (New Zealand) _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: image001.gif Type: image/gif Size: 5646 bytes Desc: not available URL: From personal_submersibles at psubs.org Thu Dec 3 11:09:11 2020 From: personal_submersibles at psubs.org (hank pronk via Personal_Submersibles) Date: Thu, 3 Dec 2020 16:09:11 +0000 (UTC) Subject: [PSUBS-MAILIST] strain relief In-Reply-To: References: <117716106.3117585.1606817074942@mail.yahoo.com> <2127165380.3403694.1606870409653@mail.yahoo.com> <1780649980.3443313.1606879452118@mail.yahoo.com> Message-ID: <2001775235.4052241.1607011751791@mail.yahoo.com> Rick, that will work, I imagine you will Tig weld ?those on. ?Anything else would be tough. ?I personally can't afford all the fancy SS?parts and pieces, in fact I just finished making 4 new penetrators with a total of 20 wires and drilled and tapped 4 holes in the hull.Hank On Wednesday, December 2, 2020, 10:38:22 AM MST, Rick Patton via Personal_Submersibles wrote: I was curious on what made me go with a 1/2" standard NPT female thread for passing all electrical wires thru the hull and using a Subcon strain relief?fitting as I knew I wouldn't of just pulled it out of the air and I saw on the K-350 blue prints?a couple of fittings that were called out as a 1/2" NPT male thread using a SS schedule 80 nipple. These were to blow down the MBT's and not for any electrical penetrators and there was a thread a long time ago where Subcon popped up so I went to them to order the fittings without doing my homework and asking what they were rated at. Rather than drill them all out and re tap for metric, I will get my local machine shop to make some short ss pieces?just long enough to take a blue globe fitting and then weld them on the outside of all my thru hulls to change them over.??Rick On Tue, Dec 1, 2020 at 5:25 PM hank pronk via Personal_Submersibles wrote: Rick,I use a cordless drill for that stuff, because I can hold it back from twisting out of my hands.Hank On Tuesday, December 1, 2020, 6:51:12 PM MST, Rick Patton via Personal_Submersibles wrote: Hank If I could put the fittings in a vice or milling machine, it would be a no brainer but these are already welded into the hull and so would have to be drilled out free hand with an electric 1/2" drill motor and I broke a finger trying to enlarge a hole as the bit stopped and the motor kept spinning and I wasn't able to let go of it fast enough. Gonna pressure test the ones I have to see at what point they extrude the wire but I still have to either drill out and re tap like you say or have a metric fitting welded to the existing fittings that are already in the sub.? Rick? On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles wrote: Rick,?Drill them out to the closest size and thread them to metric.Hank On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via Personal_Submersibles wrote: Hank No, cost wasn't the factor, it was that I can't find a vendor who makes the fitting in the 1/4" NPT size ss fitting that I had machined and welded into the front dome years ago. 3/8" is the smallest that vendors go down to. All my fittings that accept a strain relief fitting except the two in the front are 1/2". I'll have to go back threw the prints to see where I would of gotten the 1/4" from as I know I wouldn't of just pulled it out of the air. My preference?now would be a blue globe fitting as they can take much more pressure but they are made by a German company and only offered in Metric and all my existing threw hulls are a standard NPT thread.Rick On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles wrote: Rick, I just did a google search on how well nickel stands up to salt water.? Turns out, it is good.? I am sure SS is better of coarse, butthe reality of owning a P Sub is, they are not in the water much.? I assume you are asking because they are a lot cheaper.? Another realityof owning a Psub, they are expensive.? I assume you will be putting sacrificial anodes on the hull.? I would use them and keep an eye on them.? I admit, I am not as concerned about this as others, that is because I am spoiled in fresh water. ?Hank On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via Personal_Submersibles wrote: I was wondering if it was OK to use a nickel plated brass strain relief fitting to pass a cable through?Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 3 12:51:35 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Thu, 3 Dec 2020 07:51:35 -1000 Subject: [PSUBS-MAILIST] strain relief In-Reply-To: <2001775235.4052241.1607011751791@mail.yahoo.com> References: <117716106.3117585.1606817074942@mail.yahoo.com> <2127165380.3403694.1606870409653@mail.yahoo.com> <1780649980.3443313.1606879452118@mail.yahoo.com> <2001775235.4052241.1607011751791@mail.yahoo.com> Message-ID: Hank Yes I like to TIG anything like that, just still kicking myself for not checking their ratings before I got this far. Oh well, if it was easy building a sub, everybody would be doing it. I guess you are getting ready to break out the ice picks now due to winter arriving? Rick On Thu, Dec 3, 2020 at 6:10 AM hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, that will work, I imagine you will Tig weld those on. Anything > else would be tough. I personally can't afford all the fancy SS > parts and pieces, in fact I just finished making 4 new penetrators with a > total of 20 wires and drilled and tapped 4 holes in the hull. > Hank > > On Wednesday, December 2, 2020, 10:38:22 AM MST, Rick Patton via > Personal_Submersibles wrote: > > > I was curious on what made me go with a 1/2" standard NPT female thread > for passing all electrical wires thru the hull and using a Subcon strain > relief fitting as I knew I wouldn't of just pulled it out of the air and I > saw on the K-350 blue prints a couple of fittings that were called out as a > 1/2" NPT male thread using a SS schedule 80 nipple. These were to blow down > the MBT's and not for any electrical penetrators and there was a thread a > long time ago where Subcon popped up so I went to them to order the > fittings without doing my homework and asking what they were rated at. > Rather than drill them all out and re tap for metric, I will get my local > machine shop to make some short ss pieces just long enough to take a blue > globe fitting and then weld them on the outside of all my thru hulls to > change them over. > Rick > > On Tue, Dec 1, 2020 at 5:25 PM hank pronk via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, > I use a cordless drill for that stuff, because I can hold it back from > twisting out of my hands. > Hank > > On Tuesday, December 1, 2020, 6:51:12 PM MST, Rick Patton via > Personal_Submersibles wrote: > > > Hank > > If I could put the fittings in a vice or milling machine, it would be a no > brainer but these are already welded into the hull and so would have to be > drilled out free hand with an electric 1/2" drill motor and I broke a > finger trying to enlarge a hole as the bit stopped and the motor kept > spinning and I wasn't able to let go of it fast enough. Gonna pressure test > the ones I have to see at what point they extrude the wire but I still have > to either drill out and re tap like you say or have a metric fitting welded > to the existing fittings that are already in the sub. > > Rick > > On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, > Drill them out to the closest size and thread them to metric. > Hank > > On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via > Personal_Submersibles wrote: > > > Hank > > No, cost wasn't the factor, it was that I can't find a vendor who makes > the fitting in the 1/4" NPT size ss fitting that I had machined and welded > into the front dome years ago. 3/8" is the smallest that vendors go down > to. All my fittings that accept a strain relief fitting except the two in > the front are 1/2". I'll have to go back threw the prints to see where I > would of gotten the 1/4" from as I know I wouldn't of just pulled it out of > the air. My preference now would be a blue globe fitting as they can take > much more pressure but they are made by a German company and only offered > in Metric and all my existing threw hulls are a standard NPT thread. > Rick > > On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, I just did a google search on how well nickel stands up to salt > water. Turns out, it is good. I am sure SS is better of coarse, but > the reality of owning a P Sub is, they are not in the water much. I > assume you are asking because they are a lot cheaper. Another reality > of owning a Psub, they are expensive. I assume you will be putting > sacrificial anodes on the hull. I would use them and keep an eye on them. > I admit, I am not as concerned about this as others, that is because I am > spoiled in fresh water. > Hank > On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via > Personal_Submersibles wrote: > > > I was wondering if it was OK to use a nickel plated brass strain relief > fitting to pass a cable through? > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 10:31:22 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Fri, 4 Dec 2020 15:31:22 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <2075604332.2174200.1606505614916@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> Message-ID: <1706716848.4411960.1607095882395@mail.yahoo.com> Here's the first component part, COZir-A and Luminox LOX-02 on the circuit board.? This is the most expensive part of the project, about $225 USD for all you see including the aluminum box. Jon -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: CL-1.jpg Type: image/jpeg Size: 169032 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... 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URL: From personal_submersibles at psubs.org Fri Dec 4 11:09:30 2020 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Fri, 4 Dec 2020 16:09:30 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1706716848.4411960.1607095882395@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> Message-ID: <27943178.4456781.1607098170448@mail.yahoo.com> Looks good Jon.? I love this step in the design process when you have conceptualized something in your head and it comes into existence.? Cliff On Friday, December 4, 2020, 09:32:44 AM CST, Jon Wallace via Personal_Submersibles wrote: Here's the first component part, COZir-A and Luminox LOX-02 on the circuit board.? This is the most expensive part of the project, about $225 USD for all you see including the aluminum box. Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 11:59:51 2020 From: personal_submersibles at psubs.org (Alec Smyth via Personal_Submersibles) Date: Fri, 4 Dec 2020 11:59:51 -0500 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1706716848.4411960.1607095882395@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> Message-ID: That looks really outstanding! Alec On Fri, Dec 4, 2020 at 10:32 AM Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Here's the first component part, COZir-A and Luminox LOX-02 on the circuit > board. This is the most expensive part of the project, about $225 USD for > all you see including the aluminum box. > > Jon > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 13:33:03 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Fri, 4 Dec 2020 10:33:03 -0800 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1706716848.4411960.1607095882395@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> Message-ID: Jon, Looks Great! Can't wait to get building. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Fri, Dec 4, 2020 at 7:32 AM Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Here's the first component part, COZir-A and Luminox LOX-02 on the circuit > board. This is the most expensive part of the project, about $225 USD for > all you see including the aluminum box. > > Jon > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 13:33:13 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Fri, 4 Dec 2020 18:33:13 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1706716848.4411960.1607095882395@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> Message-ID: <621398633.4495108.1607106794007@mail.yahoo.com> Looks great Jon.?How are you getting the air to flow across them in the enclosure??Alan On Saturday, December 5, 2020, 04:34:12 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: Here's the first component part, COZir-A and Luminox LOX-02 on the circuit board.? This is the most expensive part of the project, about $225 USD for all you see including the aluminum box. Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 14:09:33 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Fri, 4 Dec 2020 19:09:33 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <621398633.4495108.1607106794007@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> Message-ID: <1654665517.4520907.1607108973064@mail.yahoo.com> Alan, I'm blowing on them.? :)? :)? :) On Friday, December 4, 2020, 01:35:26 PM EST, Alan James via Personal_Submersibles wrote: Looks great Jon.?How are you getting the air to flow across them in the enclosure??Alan -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 14:20:08 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Fri, 4 Dec 2020 19:20:08 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <621398633.4495108.1607106794007@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> Message-ID: <1946574409.4525064.1607109608291@mail.yahoo.com> Ok, not really blowing on them. In this case Alan, I will simply drill a bunch of small holes into the enclosure to allow air circulation.? I wasn't able to find a small enough ventilated enclosure that made sense.? This one happened to be perfect size for the PCB. Jon On Friday, December 4, 2020, 01:35:26 PM EST, Alan James via Personal_Submersibles wrote: Looks great Jon.?How are you getting the air to flow across them in the enclosure??Alan -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 19:17:36 2020 From: personal_submersibles at psubs.org (Alan via Personal_Submersibles) Date: Sat, 5 Dec 2020 13:17:36 +1300 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1654665517.4520907.1607108973064@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1654665517.4520907.1607108973064@mail.yahoo.com> Message-ID: <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> >>>"I'm blowing on them!" In that case you could incorporate a harmonica in to the design! I had a number of Aluminium housings made up for my led driver electronics. The housing was based on one of several stock items but they put various holes in them to your submitted design. Reasonably economical, from China. Alan > On 5/12/2020, at 8:09 AM, Jon Wallace via Personal_Submersibles wrote: > > Alan, I'm blowing on them. :) :) :) > > > > On Friday, December 4, 2020, 01:35:26 PM EST, Alan James via Personal_Submersibles wrote: > > > Looks great Jon. > How are you getting the air to flow across them in the enclosure? > Alan > > > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 19:27:01 2020 From: personal_submersibles at psubs.org (Alan via Personal_Submersibles) Date: Sat, 5 Dec 2020 13:27:01 +1300 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1946574409.4525064.1607109608291@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> Message-ID: Jon, sorry didn't see the second email. I had previously looked at the CO2 sensor & seen there were options for a module With tube attachments. I presume you would then need to pump the air in! Have you thought about just putting a conformal coating on the circuit board & mounting it with PCB stand-offs. Perhaps make note of this option in the build instructions. Alan > On 5/12/2020, at 8:20 AM, Jon Wallace via Personal_Submersibles wrote: > > Ok, not really blowing on them. > > In this case Alan, I will simply drill a bunch of small holes into the enclosure to allow air circulation. I wasn't able to find a small enough ventilated enclosure that made sense. This one happened to be perfect size for the PCB. > > Jon > > > On Friday, December 4, 2020, 01:35:26 PM EST, Alan James via Personal_Submersibles wrote: > > > Looks great Jon. > How are you getting the air to flow across them in the enclosure? > Alan > > > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 4 21:03:09 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Sat, 5 Dec 2020 02:03:09 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> Message-ID: <1832385415.4656162.1607133789968@mail.yahoo.com> There are many mounting options, your suggestion being one of them.? The PCB is not even necessary from a functional perspective.? You could mount the sensors with standoffs, or even just glue them into place.? But from a wiring perspective the PCB cleans things up a bit and the layout was just my own preference.? I encourage and expect people to modify to taste. Jon On Friday, December 4, 2020, 07:28:48 PM EST, Alan via Personal_Submersibles wrote: Jon,sorry didn't see the second email.I had previously looked at the CO2 sensor & seen there were options for a moduleWith tube attachments. I presume you would then need to pump the air in!Have you thought about just putting a conformal coating on the circuit board &mounting it with PCB stand-offs.Perhaps make note of this option in the build instructions.Alan On 5/12/2020, at 8:20 AM, Jon Wallace via Personal_Submersibles wrote: Ok, not really blowing on them. In this case Alan, I will simply drill a bunch of small holes into the enclosure to allow air circulation.? I wasn't able to find a small enough ventilated enclosure that made sense.? This one happened to be perfect size for the PCB. Jon On Friday, December 4, 2020, 01:35:26 PM EST, Alan James via Personal_Submersibles wrote: Looks great Jon.?How are you getting the air to flow across them in the enclosure??Alan _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 6 12:58:09 2020 From: personal_submersibles at psubs.org (Steve McQueen via Personal_Submersibles) Date: Sun, 6 Dec 2020 12:58:09 -0500 Subject: [PSUBS-MAILIST] strain relief In-Reply-To: References: <117716106.3117585.1606817074942@mail.yahoo.com> <2127165380.3403694.1606870409653@mail.yahoo.com> <1780649980.3443313.1606879452118@mail.yahoo.com> <2001775235.4052241.1607011751791@mail.yahoo.com> Message-ID: Been meaning to respond to this thread. Late with my input but I liked the thread. I ran across a few similar scenarios where a desired adapter couldn't be found in SS. I considered some welding solutions to stay with SS but in the end chose to go with my "second choice" material (normally nickel plated). Whatever I chose it had to be of the appropriate pressure rating. For my application, 250ft, fresh/salt water I felt minimal non SS material still works. My plan is to keep an eye on those non SS pieces and replace as/if needed. Steve On Thu, Dec 3, 2020 at 12:52 PM Rick Patton via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hank > Yes I like to TIG anything like that, just still kicking myself for not > checking their ratings before I got this far. Oh well, if it was easy > building a sub, everybody would be doing it. > I guess you are getting ready to break out the ice picks now due to winter > arriving? > Rick > > On Thu, Dec 3, 2020 at 6:10 AM hank pronk via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Rick, that will work, I imagine you will Tig weld those on. Anything >> else would be tough. I personally can't afford all the fancy SS >> parts and pieces, in fact I just finished making 4 new penetrators with a >> total of 20 wires and drilled and tapped 4 holes in the hull. >> Hank >> >> On Wednesday, December 2, 2020, 10:38:22 AM MST, Rick Patton via >> Personal_Submersibles wrote: >> >> >> I was curious on what made me go with a 1/2" standard NPT female thread >> for passing all electrical wires thru the hull and using a Subcon strain >> relief fitting as I knew I wouldn't of just pulled it out of the air and I >> saw on the K-350 blue prints a couple of fittings that were called out as a >> 1/2" NPT male thread using a SS schedule 80 nipple. These were to blow down >> the MBT's and not for any electrical penetrators and there was a thread a >> long time ago where Subcon popped up so I went to them to order the >> fittings without doing my homework and asking what they were rated at. >> Rather than drill them all out and re tap for metric, I will get my local >> machine shop to make some short ss pieces just long enough to take a blue >> globe fitting and then weld them on the outside of all my thru hulls to >> change them over. >> Rick >> >> On Tue, Dec 1, 2020 at 5:25 PM hank pronk via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >> Rick, >> I use a cordless drill for that stuff, because I can hold it back from >> twisting out of my hands. >> Hank >> >> On Tuesday, December 1, 2020, 6:51:12 PM MST, Rick Patton via >> Personal_Submersibles wrote: >> >> >> Hank >> >> If I could put the fittings in a vice or milling machine, it would be a >> no brainer but these are already welded into the hull and so would have to >> be drilled out free hand with an electric 1/2" drill motor and I broke a >> finger trying to enlarge a hole as the bit stopped and the motor kept >> spinning and I wasn't able to let go of it fast enough. Gonna pressure test >> the ones I have to see at what point they extrude the wire but I still have >> to either drill out and re tap like you say or have a metric fitting welded >> to the existing fittings that are already in the sub. >> >> Rick >> >> On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >> Rick, >> Drill them out to the closest size and thread them to metric. >> Hank >> >> On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via >> Personal_Submersibles wrote: >> >> >> Hank >> >> No, cost wasn't the factor, it was that I can't find a vendor who makes >> the fitting in the 1/4" NPT size ss fitting that I had machined and welded >> into the front dome years ago. 3/8" is the smallest that vendors go down >> to. All my fittings that accept a strain relief fitting except the two in >> the front are 1/2". I'll have to go back threw the prints to see where I >> would of gotten the 1/4" from as I know I wouldn't of just pulled it out of >> the air. My preference now would be a blue globe fitting as they can take >> much more pressure but they are made by a German company and only offered >> in Metric and all my existing threw hulls are a standard NPT thread. >> Rick >> >> On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >> Rick, I just did a google search on how well nickel stands up to salt >> water. Turns out, it is good. I am sure SS is better of coarse, but >> the reality of owning a P Sub is, they are not in the water much. I >> assume you are asking because they are a lot cheaper. Another reality >> of owning a Psub, they are expensive. I assume you will be putting >> sacrificial anodes on the hull. I would use them and keep an eye on them. >> I admit, I am not as concerned about this as others, that is because I am >> spoiled in fresh water. >> Hank >> On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via >> Personal_Submersibles wrote: >> >> >> I was wondering if it was OK to use a nickel plated brass strain relief >> fitting to pass a cable through? >> Rick >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 6 14:44:39 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Sun, 6 Dec 2020 09:44:39 -1000 Subject: [PSUBS-MAILIST] strain relief In-Reply-To: References: <117716106.3117585.1606817074942@mail.yahoo.com> <2127165380.3403694.1606870409653@mail.yahoo.com> <1780649980.3443313.1606879452118@mail.yahoo.com> <2001775235.4052241.1607011751791@mail.yahoo.com> Message-ID: I honestly think that a nickle plated fitting would be fine as the body that screws into the thru hull fitting would certainly take the pressure, it's the plastic or rubber thing inside that compressed that does all the work I believe, but an anode on the hull is still a wise idea as it may be more susceptible to corrosion due to stray current and dissimilar metals. Rick On Sun, Dec 6, 2020 at 7:59 AM Steve McQueen via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Been meaning to respond to this thread. Late with my input but I liked the > thread. > > I ran across a few similar scenarios where a desired adapter couldn't be > found in SS. I considered some welding solutions to stay with SS but in the > end chose to go with my "second choice" material (normally nickel plated). > Whatever I chose it had to be of the appropriate pressure rating. > > For my application, 250ft, fresh/salt water I felt minimal non SS material > still works. My plan is to keep an eye on those non SS pieces and replace > as/if needed. > > Steve > > > On Thu, Dec 3, 2020 at 12:52 PM Rick Patton via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Hank >> Yes I like to TIG anything like that, just still kicking myself for not >> checking their ratings before I got this far. Oh well, if it was easy >> building a sub, everybody would be doing it. >> I guess you are getting ready to break out the ice picks now due to >> winter arriving? >> Rick >> >> On Thu, Dec 3, 2020 at 6:10 AM hank pronk via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >>> Rick, that will work, I imagine you will Tig weld those on. Anything >>> else would be tough. I personally can't afford all the fancy SS >>> parts and pieces, in fact I just finished making 4 new penetrators with >>> a total of 20 wires and drilled and tapped 4 holes in the hull. >>> Hank >>> >>> On Wednesday, December 2, 2020, 10:38:22 AM MST, Rick Patton via >>> Personal_Submersibles wrote: >>> >>> >>> I was curious on what made me go with a 1/2" standard NPT female thread >>> for passing all electrical wires thru the hull and using a Subcon strain >>> relief fitting as I knew I wouldn't of just pulled it out of the air and I >>> saw on the K-350 blue prints a couple of fittings that were called out as a >>> 1/2" NPT male thread using a SS schedule 80 nipple. These were to blow down >>> the MBT's and not for any electrical penetrators and there was a thread a >>> long time ago where Subcon popped up so I went to them to order the >>> fittings without doing my homework and asking what they were rated at. >>> Rather than drill them all out and re tap for metric, I will get my local >>> machine shop to make some short ss pieces just long enough to take a blue >>> globe fitting and then weld them on the outside of all my thru hulls to >>> change them over. >>> Rick >>> >>> On Tue, Dec 1, 2020 at 5:25 PM hank pronk via Personal_Submersibles < >>> personal_submersibles at psubs.org> wrote: >>> >>> Rick, >>> I use a cordless drill for that stuff, because I can hold it back from >>> twisting out of my hands. >>> Hank >>> >>> On Tuesday, December 1, 2020, 6:51:12 PM MST, Rick Patton via >>> Personal_Submersibles wrote: >>> >>> >>> Hank >>> >>> If I could put the fittings in a vice or milling machine, it would be a >>> no brainer but these are already welded into the hull and so would have to >>> be drilled out free hand with an electric 1/2" drill motor and I broke a >>> finger trying to enlarge a hole as the bit stopped and the motor kept >>> spinning and I wasn't able to let go of it fast enough. Gonna pressure test >>> the ones I have to see at what point they extrude the wire but I still have >>> to either drill out and re tap like you say or have a metric fitting welded >>> to the existing fittings that are already in the sub. >>> >>> Rick >>> >>> On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles < >>> personal_submersibles at psubs.org> wrote: >>> >>> Rick, >>> Drill them out to the closest size and thread them to metric. >>> Hank >>> >>> On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via >>> Personal_Submersibles wrote: >>> >>> >>> Hank >>> >>> No, cost wasn't the factor, it was that I can't find a vendor who makes >>> the fitting in the 1/4" NPT size ss fitting that I had machined and welded >>> into the front dome years ago. 3/8" is the smallest that vendors go down >>> to. All my fittings that accept a strain relief fitting except the two in >>> the front are 1/2". I'll have to go back threw the prints to see where I >>> would of gotten the 1/4" from as I know I wouldn't of just pulled it out of >>> the air. My preference now would be a blue globe fitting as they can take >>> much more pressure but they are made by a German company and only offered >>> in Metric and all my existing threw hulls are a standard NPT thread. >>> Rick >>> >>> On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles < >>> personal_submersibles at psubs.org> wrote: >>> >>> Rick, I just did a google search on how well nickel stands up to salt >>> water. Turns out, it is good. I am sure SS is better of coarse, but >>> the reality of owning a P Sub is, they are not in the water much. I >>> assume you are asking because they are a lot cheaper. Another reality >>> of owning a Psub, they are expensive. I assume you will be putting >>> sacrificial anodes on the hull. I would use them and keep an eye on them. >>> I admit, I am not as concerned about this as others, that is because I am >>> spoiled in fresh water. >>> Hank >>> On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via >>> Personal_Submersibles wrote: >>> >>> >>> I was wondering if it was OK to use a nickel plated brass strain relief >>> fitting to pass a cable through? >>> Rick >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 7 16:37:02 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Mon, 7 Dec 2020 21:37:02 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1654665517.4520907.1607108973064@mail.yahoo.com> <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> Message-ID: <969327476.1334312.1607377022860@mail.yahoo.com> Here's the first SEMJR-101 assembled and ready for testing.? Documentation and video are in progress. -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 101-assembled.jpg Type: image/jpeg Size: 276623 bytes Desc: not available URL: From personal_submersibles at psubs.org Mon Dec 7 17:18:26 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Mon, 7 Dec 2020 22:18:26 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <969327476.1334312.1607377022860@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1654665517.4520907.1607108973064@mail.yahoo.com> <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> <969327476.1334312.1607377022860@mail.yahoo.com> Message-ID: <716728608.5499022.1607379506712@mail.yahoo.com> Looks great Jon,?so does the CO2, O2 module transmit wirelessly to this module? Noticed there were several tx rx pins on it.?Alan On Tuesday, December 8, 2020, 10:39:23 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: Here's the first SEMJR-101 assembled and ready for testing.? Documentation and video are in progress. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 7 20:09:53 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Tue, 8 Dec 2020 01:09:53 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <716728608.5499022.1607379506712@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1654665517.4520907.1607108973064@mail.yahoo.com> <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> <969327476.1334312.1607377022860@mail.yahoo.com> <716728608.5499022.1607379506712@mail.yahoo.com> Message-ID: <280085136.5527914.1607389793837@mail.yahoo.com> Wired, Alan.? None of the sensors are WIFI capable.? CO2/O2 sensors are TTL serial.? Barometer, Temp, Humidity sensors are I2C.?? Jon On Monday, December 7, 2020, 05:20:13 PM EST, Alan James via Personal_Submersibles wrote: Looks great Jon,?so does the CO2, O2 module transmit wirelessly to this module? Noticed there were several tx rx pins on it.?Alan On Tuesday, December 8, 2020, 10:39:23 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: Here's the first SEMJR-101 assembled and ready for testing.? Documentation and video are in progress. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 8 13:24:20 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Tue, 8 Dec 2020 18:24:20 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <280085136.5527914.1607389793837@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1654665517.4520907.1607108973064@mail.yahoo.com> <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> <969327476.1334312.1607377022860@mail.yahoo.com> <716728608.5499022.1607379506712@mail.yahoo.com> <280085136.5527914.1607389793837@mail.yahoo.com> Message-ID: <850400938.5815027.1607451860921@mail.yahoo.com> Jon,?that unit will save people a lot of money over the expense of buying individual monitors.?There are very cheap rf modules if anyone had a need to go wireless.?Alan On Tuesday, December 8, 2020, 02:24:18 PM GMT+13, Jon Wallace via Personal_Submersibles wrote: Wired, Alan.? None of the sensors are WIFI capable.? CO2/O2 sensors are TTL serial.? Barometer, Temp, Humidity sensors are I2C.?? Jon On Monday, December 7, 2020, 05:20:13 PM EST, Alan James via Personal_Submersibles wrote: Looks great Jon,?so does the CO2, O2 module transmit wirelessly to this module? Noticed there were several tx rx pins on it.?Alan On Tuesday, December 8, 2020, 10:39:23 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: Here's the first SEMJR-101 assembled and ready for testing.? Documentation and video are in progress. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 8 16:46:59 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Tue, 8 Dec 2020 21:46:59 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <850400938.5815027.1607451860921@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1654665517.4520907.1607108973064@mail.yahoo.com> <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> <969327476.1334312.1607377022860@mail.yahoo.com> <716728608.5499022.1607379506712@mail.yahoo.com> <280085136.5527914.1607389793837@mail.yahoo.com> <850400938.5815027.1607451860921@mail.yahoo.com> Message-ID: <1328579970.5942363.1607464019312@mail.yahoo.com> Individual monitors?? Not sure what you mean. Jon On Tuesday, December 8, 2020, 01:26:16 PM EST, Alan James via Personal_Submersibles wrote: Jon,?that unit will save people a lot of money over the expense of buying individual monitors.?There are very cheap rf modules if anyone had a need to go wireless.?Alan On Tuesday, December 8, 2020, 02:24:18 PM GMT+13, Jon Wallace via Personal_Submersibles wrote: Wired, Alan.? None of the sensors are WIFI capable.? CO2/O2 sensors are TTL serial.? Barometer, Temp, Humidity sensors are I2C.?? Jon On Monday, December 7, 2020, 05:20:13 PM EST, Alan James via Personal_Submersibles wrote: Looks great Jon,?so does the CO2, O2 module transmit wirelessly to this module? Noticed there were several tx rx pins on it.?Alan On Tuesday, December 8, 2020, 10:39:23 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: Here's the first SEMJR-101 assembled and ready for testing.? Documentation and video are in progress. _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 9 14:15:30 2020 From: personal_submersibles at psubs.org (Alan via Personal_Submersibles) Date: Thu, 10 Dec 2020 08:15:30 +1300 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1328579970.5942363.1607464019312@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1654665517.4520907.1607108973064@mail.yahoo.com> <2D71C749-95ED-48EC-9881-260A1BE74964@yahoo.com> <969327476.1334312.1607377022860@mail.yahoo.com> <716728608.5499022.1607379506712@mail.yahoo.com> <280085136.5527914.1607389793837@mail.yahoo.com> <850400938.5815027.1607451860921@mail.yahoo.com> <1328579970.5942363.1607464019312@mail.yahoo.com> Message-ID: <5397E6AC-9EC5-4482-808E-D4EAC09C80F4@yahoo.com> Jon, I was meaning it will be much cheaper building your unit that integrates Several sensors & displays on one screen than buy individual CO2, O2, pressure etc monitors (units) Alan > On 9/12/2020, at 10:46 AM, Jon Wallace via Personal_Submersibles wrote: > > Individual monitors? Not sure what you mean. > > Jon > > > > On Tuesday, December 8, 2020, 01:26:16 PM EST, Alan James via Personal_Submersibles wrote: > > > Jon, > that unit will save people a lot of money over the expense of buying individual monitors. > There are very cheap rf modules if anyone had a need to go wireless. > Alan > > > On Tuesday, December 8, 2020, 02:24:18 PM GMT+13, Jon Wallace via Personal_Submersibles wrote: > > > Wired, Alan. None of the sensors are WIFI capable. CO2/O2 sensors are TTL serial. Barometer, Temp, Humidity sensors are I2C. > > Jon > > > On Monday, December 7, 2020, 05:20:13 PM EST, Alan James via Personal_Submersibles wrote: > > > Looks great Jon, > so does the CO2, O2 module transmit wirelessly to this module? Noticed there were several tx rx pins on it. > Alan > > On Tuesday, December 8, 2020, 10:39:23 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: > > > Here's the first SEMJR-101 assembled and ready for testing. Documentation and video are in progress. > > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 12:42:39 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Sun, 13 Dec 2020 17:42:39 +0000 (UTC) Subject: [PSUBS-MAILIST] Life Support Alarms References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> Message-ID: <1806472143.203674.1607881359766@mail.yahoo.com> I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions.? I'm not convinced temp or humidity matter all that much overall and require an agreement.? I would start with the following: O2:? ? 19.0 to 23 percentCO2:? 0 to 5000 ppmPressure:? +/- 1psi Comments? -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 12:59:17 2020 From: personal_submersibles at psubs.org (hank pronk via Personal_Submersibles) Date: Sun, 13 Dec 2020 17:59:17 +0000 (UTC) Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1806472143.203674.1607881359766@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: <175525207.199896.1607882357299@mail.yahoo.com> Jon, that is all you need and directionHank On Sunday, December 13, 2020, 10:43:01 AM MST, Jon Wallace via Personal_Submersibles wrote: I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions.? I'm not convinced temp or humidity matter all that much overall and require an agreement.? I would start with the following: O2:? ? 19.0 to 23 percentCO2:? 0 to 5000 ppmPressure:? +/- 1psi Comments?_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 13:08:05 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Sun, 13 Dec 2020 18:08:05 +0000 Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1806472143.203674.1607881359766@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: <91sZrWYdTx26oNsizY3UGHaZDGH6Z5ErrEfupjHHDZ4c4os8tsYX3vnyypT1rJcRZGiMzvpansRi1m2MhLo9KSmttTxKQ-MFiCT5V2EPEgM=@protonmail.com> There is a humidity guideline in the ABS rules, which is 30% - 70% RH (non-condensing). While cabin temperature is not specifically addressed in the underwater systems rules, it is addressed elsewhere in ABS publications. I don't remember offhand whether it is from the ergonomics guide, the bridge design guide, or the steel vessel rules, but I do recall that HVAC is to maintain temperature within the range of 14?C to 30?C (57.2?F to 86?F). PSubs may need some leeway on the low end, substituting appropriate clothing (and emergency / survival insulation) for active heaters. Diving bells carry emergency insulating survival cocoons for the occupants for an emergency which entails loss of hot water supply to the bell, as the temperature will rapidly drop to the ambient water temperature. PSubs are no different unless they are insulated by design. Sean -------- Original Message -------- On Dec. 13, 2020, 10:42, Jon Wallace via Personal_Submersibles wrote: > I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions. I'm not convinced temp or humidity matter all that much overall and require an agreement. I would start with the following: > > O2: 19.0 to 23 percent > CO2: 0 to 5000 ppm > Pressure: +/- 1psi > > Comments? -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 13:24:39 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Sun, 13 Dec 2020 18:24:39 +0000 Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1806472143.203674.1607881359766@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: On the subject of internal pressure, there are two different relevant design guidelines. One is to ensure that the vessel is capable of withstanding a positive internal pressure of one atm above ambient (with mandatory pressure relief above that), and the other is the optimum service pressure, which may or may not be a controlled parameter. If it is not controlled, then it will just be a consequence of temperature and moisture balance, and as long as the means are available to equalize with surface pressure prior to opening the access hatch, that variance should be inconsequential. You may want to introduce a slight vacuum with respect to the actual atmospheric pressure in order to test seal integrity prior to submergence, so any recommendation for operating cabin pressure would need to accommodate that. On the other side of the coin, the potential for gas leaks from pressurized sources could inadvertently raise the pressure of the passenger compartment, and you might wish to introduce active control over that with e.g. an on board compressor to draw it down, in conjunction with a valved flow restricted air source to raise it if necessary. In that case, I would be inclined to control it either to the measured atmospheric pressure at the time of lock-in, or to one standard atmosphere at 101.325 kPa. Not sure where I would set alarm limits. Probably I would look at typical atmospheric pressure variances at sea level and set limits outside of that? Sean -------- Original Message -------- On Dec. 13, 2020, 10:42, Jon Wallace via Personal_Submersibles wrote: > I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions. I'm not convinced temp or humidity matter all that much overall and require an agreement. I would start with the following: > > O2: 19.0 to 23 percent > CO2: 0 to 5000 ppm > Pressure: +/- 1psi > > Comments? -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 13:33:43 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Sun, 13 Dec 2020 18:33:43 +0000 Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1806472143.203674.1607881359766@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: <2qNgGC5oAlMshEbnZCru_Vu1eBlpDrDTXBJC9fvk_dVSh0DDZ2DXOLsk5l2ZyTL23oZtopWOQscSEnGfSsS-VTbYO4V5eJw5NvvZDXnWy90=@protonmail.com> One final thought regarding the carbon dioxide measurement: by all means, try to bring it down as close to zero as is possible during a dive, but remember that atmospheric air has ~414 ppm CO2 in it, so it might be worth linking your scrubber fan circuit to a hatch interlock, (or setting a low cutoff value) so that you don't needlessly run the scrubber fan while the hatch is open on the surface chasing a CO2 target that you can't achieve. I would also be inclined to set both warning and alarm limits for all parameters, the alarms being the permitted minimums / maximums, and the warnings being an early indication to draw your attention to a parameter approaching an alarm limit while still providing sufficient time to take corrective action. Sean -------- Original Message -------- On Dec. 13, 2020, 10:42, Jon Wallace via Personal_Submersibles wrote: > I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions. I'm not convinced temp or humidity matter all that much overall and require an agreement. I would start with the following: > > O2: 19.0 to 23 percent > CO2: 0 to 5000 ppm > Pressure: +/- 1psi > > Comments? -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 14:10:50 2020 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Sun, 13 Dec 2020 19:10:50 +0000 (UTC) Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1806472143.203674.1607881359766@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: <1197700443.231727.1607886650583@mail.yahoo.com> For a Psub Life Support standard, I think you should stick with ABS rules as much as possible.? For sure being able to measure, control and set alarm states for CO2 and O2 at the level you notes are critical. Other parameters like cabin temperature and relative humidity (RH) I think are important to measure for safety reason but not control.? If you measure RH and cabin temperature them you can calculate the the Heat Index in the boat from?Heat Index Formula Celsius - Definition, Formula And Solved Examples (byjus.com)?which is nice to know given we dive in hot climates and normally don't have AC in the boats.? I personally think +/1 1 psi is a bit tight and +/- 2 psi is adequate.? As Sean notes, ABS rules call out for the control of humidly and temperature.? I think this is a bit to constraining for PSub world and I don't know of any PSubs.org boats that have AC control. Cliff | | | | | | | | | | | Heat Index Formula Celsius - Definition, Formula And Solved Examples The Heat Index (HI) is an equation combining air temperature and relative humidity to determine the equivalent t... | | | On Sunday, December 13, 2020, 11:43:40 AM CST, Jon Wallace via Personal_Submersibles wrote: I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions.? I'm not convinced temp or humidity matter all that much overall and require an agreement.? I would start with the following: O2:? ? 19.0 to 23 percentCO2:? 0 to 5000 ppmPressure:? +/- 1psi Comments?_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 14:45:25 2020 From: personal_submersibles at psubs.org (irox via Personal_Submersibles) Date: Sun, 13 Dec 2020 14:45:25 -0500 (EST) Subject: [PSUBS-MAILIST] Life Support Alarms Message-ID: <1163395849.1231.1607888726284@wamui-fuzz.atl.sa.earthlink.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 14:56:54 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Sun, 13 Dec 2020 19:56:54 +0000 (UTC) Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: <1921528801.228164.1607889414228@mail.yahoo.com> Sean, Normal weather extremes were pretty much what I was thinking of as well.? However it turns out our pressure extremes are not very far from our daily average.? After some research of Buoy data here in the northeast it looks like over the last three years we've gone from lows of 988mbar to highs of 1041mbar, or about .4 psi on either side of "average".? That fits within my 1psi range although I could go with 2psi as Cliff suggested, as well. If we think about SCUBA we know we are going to feel it in our ears somewhere around 3-4psi (180mbar?), so an alarm at 1-2 psi letting you know something is coming seems reasonable to me. Thoughts?Jon On Sunday, December 13, 2020, 01:26:25 PM EST, Sean T. Stevenson via Personal_Submersibles wrote: On the subject of internal pressure, there are two different relevant design guidelines. One is to ensure that the vessel is capable of withstanding a positive internal pressure of one atm above ambient (with mandatory pressure relief above that), and the other is the optimum service pressure, which may or may not be a controlled parameter. If it is not controlled, then it will just be a consequence of temperature and moisture balance, and as long as the means are available to equalize with surface pressure prior to opening the access hatch, that variance should be inconsequential. You may want to introduce a slight vacuum with respect to the actual atmospheric pressure in order to test seal integrity prior to submergence, so any recommendation for operating cabin pressure would need to accommodate that. On the other side of the coin, the potential for gas leaks from pressurized sources could inadvertently raise the pressure of the passenger compartment, and you might wish to introduce active control over that with e.g. an on board compressor to draw it down, in conjunction with a valved flow restricted air source to raise it if necessary. In that case, I would be inclined to control it either to the measured atmospheric pressure at the time of lock-in, or to one standard atmosphere at 101.325 kPa. Not sure where I would set alarm limits. Probably I would look at typical atmospheric pressure variances at sea level and set limits outside of that? Sean -------- Original Message -------- On Dec. 13, 2020, 10:42, Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions.? I'm not convinced temp or humidity matter all that much overall and require an agreement.? I would start with the following: O2:? ? 19.0 to 23 percentCO2:? 0 to 5000 ppmPressure:? +/- 1psi Comments?_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 15:11:32 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Sun, 13 Dec 2020 20:11:32 +0000 (UTC) Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1197700443.231727.1607886650583@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> <1197700443.231727.1607886650583@mail.yahoo.com> Message-ID: <1250141004.179456.1607890292285@mail.yahoo.com> Cliff, Looking at your flathead lake data, you had a total spread of about .5psi during your dives.? High of 14.1 and low of 13.6 from what I can see of the data you provided.? So a 1-2 psi variant either side of atmospheric seems like it would be reasonable. Jon On Sunday, December 13, 2020, 02:12:35 PM EST, Cliff Redus via Personal_Submersibles wrote: For a Psub Life Support standard, I think you should stick with ABS rules as much as possible.? For sure being able to measure, control and set alarm states for CO2 and O2 at the level you notes are critical. Other parameters like cabin temperature and relative humidity (RH) I think are important to measure for safety reason but not control.? If you measure RH and cabin temperature them you can calculate the the Heat Index in the boat from?Heat Index Formula Celsius - Definition, Formula And Solved Examples (byjus.com)?which is nice to know given we dive in hot climates and normally don't have AC in the boats.? I personally think +/1 1 psi is a bit tight and +/- 2 psi is adequate.? As Sean notes, ABS rules call out for the control of humidly and temperature.? I think this is a bit to constraining for PSub world and I don't know of any PSubs.org boats that have AC control. Cliff | | | | | | | | | | | Heat Index Formula Celsius - Definition, Formula And Solved Examples The Heat Index (HI) is an equation combining air temperature and relative humidity to determine the equivalent t... | | | On Sunday, December 13, 2020, 11:43:40 AM CST, Jon Wallace via Personal_Submersibles wrote: I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions.? I'm not convinced temp or humidity matter all that much overall and require an agreement.? I would start with the following: O2:? ? 19.0 to 23 percentCO2:? 0 to 5000 ppmPressure:? +/- 1psi Comments?_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 13 18:40:08 2020 From: personal_submersibles at psubs.org (Alec Smyth via Personal_Submersibles) Date: Sun, 13 Dec 2020 18:40:08 -0500 Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1806472143.203674.1607881359766@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: Hi Jon, Ah, the one that needs discussion in my opinion is the internal pressure. For every 1psi of internal over-pressure, my bow dome sees 566 lbs of force trying to blow it out of the sub (at the surface of course.) How much can it take before blowing out? I don't know, and it's not something I can test. The highest I've ever gone I think is 0.5psi over ambient. On the negative side, there's no problem of course and one could go to a much higher value with no problem. Internal pressure is the reason an overpressure valve is essential, but there again I'm running a little by the seat of my pants at the moment because although I have a large OP valve, I don't know its cracking pressure. Cliff, however, is coming to the rescue soon because he is planning to actually measure this. More to follow sometime soon... Note the color coding thresholds on my cabin pressure faceplate (attached.) They are not scientific, however, and the thresholds would in any case be dependent on construction details of each sub. Best, Alec On Sun, Dec 13, 2020 at 12:43 PM Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > I'm looking to start a discussion to create a PSUBS standard for max/min > cabin operating conditions. I'm not convinced temp or humidity matter all > that much overall and require an agreement. I would start with the > following: > > O2: 19.0 to 23 percent > CO2: 0 to 5000 ppm > Pressure: +/- 1psi > > Comments? > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Pressure Gauge Faceplate resized no border.jpg Type: image/jpeg Size: 21908 bytes Desc: not available URL: From personal_submersibles at psubs.org Sun Dec 13 22:12:44 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Sun, 13 Dec 2020 19:12:44 -0800 Subject: [PSUBS-MAILIST] Scrubber size Message-ID: Hi Guys, I was following Jon's thread and thought how appropriate. I am building a scrubber for the VAST sub. The housing I acquired was a carbon filter used in the grow industry. With an interior screen core for the air to flow thru to the sodasorb core to the outside screen. The volume of this space holds 3.6 lbs of carbon. Not sure if the weight per volume of the sodasorb is exactly the same, but if it is that chamber would produce about 14.4 hours of absorption. I'm am thinking that I am going to cut the unit in half. My thinking is that for a typical day of diving, 14 hrs seem a bit excessive and I would be wasting a lot of sorb. With pre packaged, vacuumed bags I can carry what would be required to meet ABS guidelines. One of my concerns though is that with the compactness of the VAST sub with a reduced volume of sorb, would the heat generated be greater than with more sorb, thereby also increasing the humidity buildup. I am hoping to get some experience feedback from other small owners, and what they have used volume wise of the sorb for a typical day of diving. The co2 unit I am using measures humidity as well as co2 ppm. Attached are pictures of the unit ready to have the fan attached. Best Regards, David Colombo -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image3735587101207958388.jpg Type: image/jpeg Size: 333188 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image6248219958829571720.jpg Type: image/jpeg Size: 351093 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image1702470987095232723.jpg Type: image/jpeg Size: 378808 bytes Desc: not available URL: From personal_submersibles at psubs.org Sun Dec 13 22:16:18 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Mon, 14 Dec 2020 03:16:18 +0000 (UTC) Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: <1806472143.203674.1607881359766@mail.yahoo.com> References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: <798156523.337378.1607915778945@mail.yahoo.com> Jon,?I would just go with what ABS or DNV-GL say,? as approving anything else as an organization might be problematic.?People will do what they want anyway as controlling temperature and humidity may be out of the range of most Psubbers.?Alan On Monday, December 14, 2020, 06:44:39 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions.? I'm not convinced temp or humidity matter all that much overall and require an agreement.? I would start with the following: O2:? ? 19.0 to 23 percentCO2:? 0 to 5000 ppmPressure:? +/- 1psi Comments?_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 09:38:07 2020 From: personal_submersibles at psubs.org (Alec Smyth via Personal_Submersibles) Date: Mon, 14 Dec 2020 09:38:07 -0500 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: References: Message-ID: Hi Dave, >From the photos, I think you've picked up the exact same carbon scrubber I had in Snoopy. The holes are a bit big for Sofnolime, but you can easily add a second layer of much finer mesh stitched to the inside of the existing cylinders with fine wire. Use a donut of foam on top of the Sofnolime to squash it down, so there isn't a path of low resistance for the air to flow over rather than through the Sofnolime as it settles. Also, be sure to use a radial blower, not an axial one. As for the volume, it was perfect for Snoopy but I was diving with two people, so if you cut it in half I think you'll be about right. I don't anticipate you'll get any significant heating. The absorbent will get soggy and can drip, so mount it with the blower on top to keep that dry. Best, Alec On Sun, Dec 13, 2020 at 10:14 PM David Colombo via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi Guys, I was following Jon's thread and thought how appropriate. I am > building a scrubber for the VAST sub. The housing I acquired was a carbon > filter used in the grow industry. With an interior screen core for the air > to flow thru to the sodasorb core to the outside screen. The volume of this > space holds 3.6 lbs of carbon. Not sure if the weight per volume of the > sodasorb is exactly the same, but if it is that chamber would produce about > 14.4 hours of absorption. I'm am thinking that I am going to cut the unit > in half. My thinking is that for a typical day of diving, 14 hrs seem a bit > excessive and I would be wasting a lot of sorb. With pre packaged, > vacuumed bags I can carry what would be required to meet ABS guidelines. > One of my concerns though is that with the compactness of the VAST sub with > a reduced volume of sorb, would the heat generated be greater than with > more sorb, thereby also increasing the humidity buildup. > I am hoping to get some experience feedback from other small owners, and > what they have used volume wise of the sorb for a typical day of diving. > The co2 unit I am using measures humidity as well as co2 ppm. > Attached are pictures of the unit ready to have the fan attached. > Best Regards, > David Colombo > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 09:40:51 2020 From: personal_submersibles at psubs.org (Steve McQueen via Personal_Submersibles) Date: Mon, 14 Dec 2020 09:40:51 -0500 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: References: Message-ID: Dave, From a design standpoint I went with the wasteful media approach. I don't see myself diving often enough to worry about the waste. I made my scrubber volume as large as the installation footprint allowed. I didn't want to worry about changing the media anymore than needed. It still ended up being a trade off as I think I have to change my media out once or twice to have 72 hour capacity. However you do it imagine changing the media while sitting in the sub. Steve On Sun, Dec 13, 2020 at 10:14 PM David Colombo via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi Guys, I was following Jon's thread and thought how appropriate. I am > building a scrubber for the VAST sub. The housing I acquired was a carbon > filter used in the grow industry. With an interior screen core for the air > to flow thru to the sodasorb core to the outside screen. The volume of this > space holds 3.6 lbs of carbon. Not sure if the weight per volume of the > sodasorb is exactly the same, but if it is that chamber would produce about > 14.4 hours of absorption. I'm am thinking that I am going to cut the unit > in half. My thinking is that for a typical day of diving, 14 hrs seem a bit > excessive and I would be wasting a lot of sorb. With pre packaged, > vacuumed bags I can carry what would be required to meet ABS guidelines. > One of my concerns though is that with the compactness of the VAST sub with > a reduced volume of sorb, would the heat generated be greater than with > more sorb, thereby also increasing the humidity buildup. > I am hoping to get some experience feedback from other small owners, and > what they have used volume wise of the sorb for a typical day of diving. > The co2 unit I am using measures humidity as well as co2 ppm. > Attached are pictures of the unit ready to have the fan attached. > Best Regards, > David Colombo > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 11:07:21 2020 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:07:21 +0000 (UTC) Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: References: Message-ID: <2079853271.493639.1607962042088@mail.yahoo.com> David, the scrubber on the R300 holds 3.5 lbs of SodaSorb HP.? The longest I have been submerged was 12.5 hours during a pool test.? The longest I have been submerged for a normal dive event is 5 hours at one of the Islamorada PSub conventions.? My NOP is to discard partially consumed absorbent at the start of each dive day regardless of how many hours used and refill.? I keep spare absorbent in sealed bags onboard sufficient to last 80 hours (8 hours normal dive time plus 72 hours emergency time).? Due to W.R. Grace, the manufacture of SodaSorb HP, stopping manufacturing of this CO2 absorbent, I have switched to DiveSorb Pro from Dragger.? I have no experience with the new absorbent but plan on doing some shop testing prior to my next dive.? If you are interested, I have a report on my life support system where I have documented the system as well as all testing.? ?If you are interest, I would be glad to send it to you if you will contact me off list.? The scrubber design I used is based on the scrubber in Snoopy.? ?It is a radial flow charcoal filter container with a blower that discharges the clean air from the top.? After I got the right blower speced for the unit, the scrubber has worked great. The filter container is 6" OD x 7-1/2" height, with 4" ID for annulus that contain the absorbent.? The one I use is like?iPower 4" 6" 8" 10" 12" Inch Air Carbon Filter Virgin Charcoal for Inline Fan | eBay | | | | $32.99 | | | | | | | iPower 4" 6" 8" 10" 12" Inch Air Carbon Filter Virgin Charcoal for Inlin... Professional grade filter that will handle the nastiest odors produced by the prettiest plants. ?Durability? iPo... | | | I am a big believer in shop life support tests so that you know the actual performance limits of your life support system.? I would encourage all phubbers to do this qualification work prior to normal dive operations.? It is actually a lot of fun to conduct these test.? I find there has been no problem in getting volunteers for these life support test which need to be done in a controlled environment for safety purposes. On Sunday, December 13, 2020, 09:14:10 PM CST, David Colombo via Personal_Submersibles wrote: Hi Guys, I was following Jon's thread and thought how appropriate.? I am building a scrubber for the VAST sub. The housing I acquired was a carbon filter used in the grow industry.? With an interior screen core for the air to flow thru to the sodasorb core to the outside screen. The volume of this space holds 3.6 lbs of carbon. Not sure if the weight per volume of the sodasorb is exactly the same, but if it is that chamber would produce about 14.4 hours of absorption. I'm am thinking that I am going to cut the unit in half. My thinking is that for a typical day of diving, 14 hrs seem a bit excessive and I would be wasting? a lot of sorb.? With pre packaged, vacuumed bags I can carry what would be required to meet ABS guidelines.? One of my concerns though is that with the compactness of the VAST sub with a reduced volume of sorb, would the heat generated be greater than with more sorb, thereby also increasing the humidity buildup.I am hoping to get some experience feedback from other small owners, and what they have used volume wise of the sorb for a typical day of diving. The co2 unit I am using measures humidity as well as co2 ppm.?Attached are pictures of the unit ready to have the fan attached.Best Regards,David Colombo _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 1607961600404blob.jpg Type: image/png Size: 847463 bytes Desc: not available URL: From personal_submersibles at psubs.org Mon Dec 14 13:49:52 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Mon, 14 Dec 2020 18:49:52 +0000 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: References: Message-ID: The recommendation to use a centrifugal blower as opposed to an axial fan necessarily implies this, but I just wanted to point out that a radial scrubber will be most efficient with the flow direction from outside to inside of the scrubber. Sean -------- Original Message -------- On Dec. 13, 2020, 20:12, David Colombo via Personal_Submersibles wrote: > Hi Guys, I was following Jon's thread and thought how appropriate. I am building a scrubber for the VAST sub. The housing I acquired was a carbon filter used in the grow industry. With an interior screen core for the air to flow thru to the sodasorb core to the outside screen. The volume of this space holds 3.6 lbs of carbon. Not sure if the weight per volume of the sodasorb is exactly the same, but if it is that chamber would produce about 14.4 hours of absorption. I'm am thinking that I am going to cut the unit in half. My thinking is that for a typical day of diving, 14 hrs seem a bit excessive and I would be wasting a lot of sorb. With pre packaged, vacuumed bags I can carry what would be required to meet ABS guidelines. One of my concerns though is that with the compactness of the VAST sub with a reduced volume of sorb, would the heat generated be greater than with more sorb, thereby also increasing the humidity buildup. > I am hoping to get some experience feedback from other small owners, and what they have used volume wise of the sorb for a typical day of diving. The co2 unit I am using measures humidity as well as co2 ppm. > Attached are pictures of the unit ready to have the fan attached. > Best Regards, > David Colombo -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 18:24:08 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Mon, 14 Dec 2020 15:24:08 -0800 Subject: [PSUBS-MAILIST] Scrubber size Message-ID: <20201214152408.2F675676@m0117566.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 18:32:51 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Mon, 14 Dec 2020 23:32:51 +0000 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: <20201214152408.2F675676@m0117566.ppops.net> References: <20201214152408.2F675676@m0117566.ppops.net> Message-ID: <-EbC0H25kibp57Q3uZG0-KDM4tmnng6K0MpGli8akp-f0qeEMInwRRncPkVvsYOO9xrLrD3r33kaQcj-mOAwjquDMZ_ls8TFjMvBlWWAKZM=@protonmail.com> Scrubber capacity will be dictated not only by the mass of scrubber media available, but by the particle size as well, because the reaction is surface area driven. With Sofnolime, 797 grade is much smaller granules than CD grade and so will give you extended duration at the expense of much greater resistance to airflow. This will e.g. improve your dwell time but slow down the complete cabin turnover rate. Sean -------- Original Message -------- On Dec. 14, 2020, 16:24, Brian Cox via Personal_Submersibles wrote: > My scrubber holds about 11 lbs of sofnolime. I have been wrapping my scrubber with cling wrap after the end of a dive. I've mostly been testing on my "dives" so usually only an hour or so. > > Also, I just recently charged up my scrubber and then wrapped with cling wrap, so the scrubber is ready to go for the next dive. > > Brian > > --- personal_submersibles at psubs.org wrote: > > From: "Sean T. Stevenson via Personal_Submersibles" > To: personal_submersibles at psubs.org > Subject: Re: [PSUBS-MAILIST] Scrubber size > Date: Mon, 14 Dec 2020 18:49:52 +0000 > > The recommendation to use a centrifugal blower as opposed to an axial fan necessarily implies this, but I just wanted to point out that a radial scrubber will be most efficient with the flow direction from outside to inside of the scrubber. > > Sean > > -------- Original Message -------- > On Dec. 13, 2020, 20:12, David Colombo via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > >> Hi Guys, I was following Jon's thread and thought how appropriate. I am building a scrubber for the VAST sub. The housing I acquired was a carbon filter used in the grow industry. With an interior screen core for the air to flow thru to the sodasorb core to the outside screen. The volume of this space holds 3.6 lbs of carbon. Not sure if the weight per volume of the sodasorb is exactly the same, but if it is that chamber would produce about 14.4 hours of absorption. I'm am thinking that I am going to cut the unit in half. My thinking is that for a typical day of diving, 14 hrs seem a bit excessive and I would be wasting a lot of sorb. With pre packaged, vacuumed bags I can carry what would be required to meet ABS guidelines. One of my concerns though is that with the compactness of the VAST sub with a reduced volume of sorb, would the heat generated be greater than with more sorb, thereby also increasing the humidity buildup. >> I am hoping to get some experience feedback from other small owners, and what they have used volume wise of the sorb for a typical day of diving. The co2 unit I am using measures humidity as well as co2 ppm. >> Attached are pictures of the unit ready to have the fan attached. >> Best Regards, >> David Colombo > > _______________________________________________ Personal_Submersibles mailing list [Personal_Submersibles at psubs.org](/eonapps/ft/wm/page/compose?send_to=Personal_Submersibles%40psubs.org) http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 19:20:08 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:20:08 -0800 Subject: [PSUBS-MAILIST] Scrubber size Message-ID: <20201214162008.2551D647@m0117457.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 19:28:17 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Tue, 15 Dec 2020 00:28:17 +0000 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: <20201214162008.2551D647@m0117457.ppops.net> References: <20201214162008.2551D647@m0117457.ppops.net> Message-ID: The only information I am aware of is what's on the technical data sheet from Molecular Products. See attached. Sean Sent -------- Original Message -------- On Dec. 14, 2020, 17:20, Brian Cox via Personal_Submersibles wrote: > I'm using 408 mesh CD grade Sofnolime , > > Sean, Is there any documentation on the difference in the life of the absorbent material from the smaller 797 grade as opposed to the CD grade? Assuming efficient air flow. > > Brian > > --- personal_submersibles at psubs.org wrote: > > From: "Sean T. Stevenson via Personal_Submersibles" > To: personal_submersibles at psubs.org > Subject: Re: [PSUBS-MAILIST] Scrubber size > Date: Mon, 14 Dec 2020 23:32:51 +0000 > > Scrubber capacity will be dictated not only by the mass of scrubber media available, but by the particle size as well, because the reaction is surface area driven. With Sofnolime, 797 grade is much smaller granules than CD grade and so will give you extended duration at the expense of much greater resistance to airflow. This will e.g. improve your dwell time but slow down the complete cabin turnover rate. > > Sean > > -------- Original Message -------- > On Dec. 14, 2020, 16:24, Brian Cox via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > >> My scrubber holds about 11 lbs of sofnolime. I have been wrapping my scrubber with cling wrap after the end of a dive. I've mostly been testing on my "dives" so usually only an hour or so. >> >> Also, I just recently charged up my scrubber and then wrapped with cling wrap, so the scrubber is ready to go for the next dive. >> >> Brian >> >> --- personal_submersibles at psubs.org wrote: >> >> From: "Sean T. Stevenson via Personal_Submersibles" >> To: personal_submersibles at psubs.org >> Subject: Re: [PSUBS-MAILIST] Scrubber size >> Date: Mon, 14 Dec 2020 18:49:52 +0000 >> >> The recommendation to use a centrifugal blower as opposed to an axial fan necessarily implies this, but I just wanted to point out that a radial scrubber will be most efficient with the flow direction from outside to inside of the scrubber. >> >> Sean >> >> -------- Original Message -------- >> On Dec. 13, 2020, 20:12, David Colombo via Personal_Submersibles < personal_submersibles at psubs.org> wrote: >> >>> Hi Guys, I was following Jon's thread and thought how appropriate. I am building a scrubber for the VAST sub. The housing I acquired was a carbon filter used in the grow industry. With an interior screen core for the air to flow thru to the sodasorb core to the outside screen. The volume of this space holds 3.6 lbs of carbon. Not sure if the weight per volume of the sodasorb is exactly the same, but if it is that chamber would produce about 14.4 hours of absorption. I'm am thinking that I am going to cut the unit in half. My thinking is that for a typical day of diving, 14 hrs seem a bit excessive and I would be wasting a lot of sorb. With pre packaged, vacuumed bags I can carry what would be required to meet ABS guidelines. One of my concerns though is that with the compactness of the VAST sub with a reduced volume of sorb, would the heat generated be greater than with more sorb, thereby also increasing the humidity buildup. >>> I am hoping to get some experience feedback from other small owners, and what they have used volume wise of the sorb for a typical day of diving. The co2 unit I am using measures humidity as well as co2 ppm. >>> Attached are pictures of the unit ready to have the fan attached. >>> Best Regards, >>> David Colombo >> >> _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ Personal_Submersibles mailing list [Personal_Submersibles at psubs.org](/eonapps/ft/wm/page/compose?send_to=Personal_Submersibles%40psubs.org) http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Sofnolime-797-CD-TDS-v12-1.pdf Type: application/pdf Size: 660386 bytes Desc: not available URL: From personal_submersibles at psubs.org Mon Dec 14 19:33:10 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:33:10 -0800 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: References: Message-ID: Alex, thats what I thought. The filter did come with a fine mesh bag, and the outside fabric cover I assumed that would be small enough. I need to find some ss snap clamps to pull the cover down. The fiter did come with foam donut at both top and bottom. I was going to replace that with a litter denser foam to help in the compression. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Mon, Dec 14, 2020 at 6:39 AM Alec Smyth via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi Dave, > > From the photos, I think you've picked up the exact same carbon scrubber I > had in Snoopy. The holes are a bit big for Sofnolime, but you can easily > add a second layer of much finer mesh stitched to the inside of the > existing cylinders with fine wire. Use a donut of foam on top of the > Sofnolime to squash it down, so there isn't a path of low resistance for > the air to flow over rather than through the Sofnolime as it settles. Also, > be sure to use a radial blower, not an axial one. As for the volume, it was > perfect for Snoopy but I was diving with two people, so if you cut it in > half I think you'll be about right. I don't anticipate you'll get any > significant heating. The absorbent will get soggy and can drip, so mount it > with the blower on top to keep that dry. > > Best, > Alec > > On Sun, Dec 13, 2020 at 10:14 PM David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Hi Guys, I was following Jon's thread and thought how appropriate. I am >> building a scrubber for the VAST sub. The housing I acquired was a carbon >> filter used in the grow industry. With an interior screen core for the air >> to flow thru to the sodasorb core to the outside screen. The volume of this >> space holds 3.6 lbs of carbon. Not sure if the weight per volume of the >> sodasorb is exactly the same, but if it is that chamber would produce about >> 14.4 hours of absorption. I'm am thinking that I am going to cut the unit >> in half. My thinking is that for a typical day of diving, 14 hrs seem a bit >> excessive and I would be wasting a lot of sorb. With pre packaged, >> vacuumed bags I can carry what would be required to meet ABS guidelines. >> One of my concerns though is that with the compactness of the VAST sub with >> a reduced volume of sorb, would the heat generated be greater than with >> more sorb, thereby also increasing the humidity buildup. >> I am hoping to get some experience feedback from other small owners, and >> what they have used volume wise of the sorb for a typical day of diving. >> The co2 unit I am using measures humidity as well as co2 ppm. >> Attached are pictures of the unit ready to have the fan attached. >> Best Regards, >> David Colombo >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 19:36:29 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:36:29 -0800 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: References: Message-ID: Steve thanks for the advice. It could get messy in a change out. I could practice while sitting in the sub for the 12 hr test. (my wife says to me what are you going to do for 12 hours?) I just shrugged my shoulders? Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Mon, Dec 14, 2020 at 6:41 AM Steve McQueen via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Dave, From a design standpoint I went with the wasteful media approach. I > don't see myself diving often enough to worry about the waste. I made my > scrubber volume as large as the installation footprint allowed. I didn't > want to worry about changing the media anymore than needed. It still ended > up being a trade off as I think I have to change my media out once or twice > to have 72 hour capacity. > > However you do it imagine changing the media while sitting in the sub. > > Steve > > > > On Sun, Dec 13, 2020 at 10:14 PM David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Hi Guys, I was following Jon's thread and thought how appropriate. I am >> building a scrubber for the VAST sub. The housing I acquired was a carbon >> filter used in the grow industry. With an interior screen core for the air >> to flow thru to the sodasorb core to the outside screen. The volume of this >> space holds 3.6 lbs of carbon. Not sure if the weight per volume of the >> sodasorb is exactly the same, but if it is that chamber would produce about >> 14.4 hours of absorption. I'm am thinking that I am going to cut the unit >> in half. My thinking is that for a typical day of diving, 14 hrs seem a bit >> excessive and I would be wasting a lot of sorb. With pre packaged, >> vacuumed bags I can carry what would be required to meet ABS guidelines. >> One of my concerns though is that with the compactness of the VAST sub with >> a reduced volume of sorb, would the heat generated be greater than with >> more sorb, thereby also increasing the humidity buildup. >> I am hoping to get some experience feedback from other small owners, and >> what they have used volume wise of the sorb for a typical day of diving. >> The co2 unit I am using measures humidity as well as co2 ppm. >> Attached are pictures of the unit ready to have the fan attached. >> Best Regards, >> David Colombo >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 19:41:35 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:41:35 -0800 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: <2079853271.493639.1607962042088@mail.yahoo.com> References: <2079853271.493639.1607962042088@mail.yahoo.com> Message-ID: Cliff, thanks. Thats the same as I purchased. Where did you source your radial fan? Wyvonne laughed when I told her I would be sitting in the sub for 12 hrs like Cliff. Here first response was can't you find someone to trade places 1/2 way through? LOL I will look into that other scrubber material. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Mon, Dec 14, 2020 at 8:08 AM Cliff Redus via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > David, the scrubber on the R300 holds 3.5 lbs of SodaSorb HP. The longest > I have been submerged was 12.5 hours during a pool test. The longest I > have been submerged for a normal dive event is 5 hours at one of the > Islamorada PSub conventions. My NOP is to discard partially consumed > absorbent at the start of each dive day regardless of how many hours used > and refill. I keep spare absorbent in sealed bags onboard sufficient to > last 80 hours (8 hours normal dive time plus 72 hours emergency time). Due > to W.R. Grace, the manufacture of SodaSorb HP, stopping manufacturing of > this CO2 absorbent, I have switched to DiveSorb Pro from Dragger. I have > no experience with the new absorbent but plan on doing some shop testing > prior to my next dive. If you are interested, I have a report on my life > support system where I have documented the system as well as all testing. > If you are interest, I would be glad to send it to you if you will contact > me off list. The scrubber design I used is based on the scrubber in > Snoopy. It is a radial flow charcoal filter container with a blower that > discharges the clean air from the top. After I got the right blower speced > for the unit, the scrubber has worked great. > > The filter container is 6" OD x 7-1/2" height, with 4" ID for annulus that > contain the absorbent. The one I use is like iPower 4" 6" 8" 10" 12" > Inch Air Carbon Filter Virgin Charcoal for Inline Fan | eBay > > > $32.99 > iPower 4" 6" 8" 10" 12" Inch Air Carbon Filter Virgin Charcoal for Inlin... > > Professional grade filter that will handle the nastiest odors produced by > the prettiest plants. ?Durability? iPo... > > > > > [image: Inline image] > I am a big believer in shop life support tests so that you know the actual > performance limits of your life support system. I would encourage all > phubbers to do this qualification work prior to normal dive operations. It > is actually a lot of fun to conduct these test. I find there has been no > problem in getting volunteers for these life support test which need to be > done in a controlled environment for safety purposes. > > On Sunday, December 13, 2020, 09:14:10 PM CST, David Colombo via > Personal_Submersibles wrote: > > > Hi Guys, I was following Jon's thread and thought how appropriate. I am > building a scrubber for the VAST sub. The housing I acquired was a carbon > filter used in the grow industry. With an interior screen core for the air > to flow thru to the sodasorb core to the outside screen. The volume of this > space holds 3.6 lbs of carbon. Not sure if the weight per volume of the > sodasorb is exactly the same, but if it is that chamber would produce about > 14.4 hours of absorption. I'm am thinking that I am going to cut the unit > in half. My thinking is that for a typical day of diving, 14 hrs seem a bit > excessive and I would be wasting a lot of sorb. With pre packaged, > vacuumed bags I can carry what would be required to meet ABS guidelines. > One of my concerns though is that with the compactness of the VAST sub with > a reduced volume of sorb, would the heat generated be greater than with > more sorb, thereby also increasing the humidity buildup. > I am hoping to get some experience feedback from other small owners, and > what they have used volume wise of the sorb for a typical day of diving. > The co2 unit I am using measures humidity as well as co2 ppm. > Attached are pictures of the unit ready to have the fan attached. > Best Regards, > David Colombo > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 1607961600404blob.jpg Type: image/jpeg Size: 847463 bytes Desc: not available URL: From personal_submersibles at psubs.org Mon Dec 14 19:48:10 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:48:10 -0800 Subject: [PSUBS-MAILIST] Scrubber size Message-ID: <20201214164810.999B4608@m0117567.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 19:49:26 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:49:26 -0800 Subject: [PSUBS-MAILIST] Scrubber size Message-ID: <20201214164926.999B4606@m0117567.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 19:57:54 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Mon, 14 Dec 2020 16:57:54 -0800 Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: <20201214164926.999B4606@m0117567.ppops.net> References: <20201214164926.999B4606@m0117567.ppops.net> Message-ID: Brian, Corrosive to the SS mesh shell? Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Mon, Dec 14, 2020 at 4:49 PM Brian Cox via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > David, And that material is corrosive. > > Brian > > > > --- personal_submersibles at psubs.org wrote: > > From: David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> > To: Personal Submersibles General Discussion < > personal_submersibles at psubs.org> > Subject: Re: [PSUBS-MAILIST] Scrubber size > Date: Mon, 14 Dec 2020 16:36:29 -0800 > > Steve thanks for the advice. It could get messy in a change out. I could > practice while sitting in the sub for the 12 hr test. (my wife says to me > what are you going to do for 12 hours?) > I just shrugged my shoulders? > > Best Regards, > David Colombo > > 804 College Ave > Santa Rosa, CA. 95404 > (707) 536-1424 > www.SeaQuestor.com > > > > On Mon, Dec 14, 2020 at 6:41 AM Steve McQueen via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Dave, From a design standpoint I went with the wasteful media approach. I > don't see myself diving often enough to worry about the waste. I made my > scrubber volume as large as the installation footprint allowed. I didn't > want to worry about changing the media anymore than needed. It still ended > up being a trade off as I think I have to change my media out once or twice > to have 72 hour capacity. > > However you do it imagine changing the media while sitting in the sub. > > Steve > > > > On Sun, Dec 13, 2020 at 10:14 PM David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Hi Guys, I was following Jon's thread and thought how appropriate. I am > building a scrubber for the VAST sub. The housing I acquired was a carbon > filter used in the grow industry. With an interior screen core for the air > to flow thru to the sodasorb core to the outside screen. The volume of this > space holds 3.6 lbs of carbon. Not sure if the weight per volume of the > sodasorb is exactly the same, but if it is that chamber would produce about > 14.4 hours of absorption. I'm am thinking that I am going to cut the unit > in half. My thinking is that for a typical day of diving, 14 hrs seem a bit > excessive and I would be wasting a lot of sorb. With pre packaged, > vacuumed bags I can carry what would be required to meet ABS guidelines. > One of my concerns though is that with the compactness of the VAST sub with > a reduced volume of sorb, would the heat generated be greater than with > more sorb, thereby also increasing the humidity buildup. > I am hoping to get some experience feedback from other small owners, and > what they have used volume wise of the sorb for a typical day of diving. > The co2 unit I am using measures humidity as well as co2 ppm. > Attached are pictures of the unit ready to have the fan attached. > Best Regards, > David Colombo > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ Personal_Submersibles > mailing list Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 20:06:04 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Mon, 14 Dec 2020 17:06:04 -0800 Subject: [PSUBS-MAILIST] Scrubber size Message-ID: <20201214170604.99998F0E@m0117565.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 20:19:35 2020 From: personal_submersibles at psubs.org (irox via Personal_Submersibles) Date: Mon, 14 Dec 2020 17:19:35 -0800 (GMT-08:00) Subject: [PSUBS-MAILIST] Scrubber size Message-ID: <203874782.4790.1607995175520@wamui-teddy.atl.sa.earthlink.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 20:24:09 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Mon, 14 Dec 2020 17:24:09 -0800 Subject: [PSUBS-MAILIST] Scrubber size Message-ID: <20201214172409.2F67509A@m0117566.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 14 21:03:52 2020 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Tue, 15 Dec 2020 02:03:52 +0000 (UTC) Subject: [PSUBS-MAILIST] Scrubber size In-Reply-To: References: <2079853271.493639.1607962042088@mail.yahoo.com> Message-ID: <1060904567.730963.1607997833007@mail.yahoo.com> Shop dives are great! You will enjoy.? Spec on the scrubber blower I used is in the R300 Life Support report I just sent you. Best On Monday, December 14, 2020, 06:42:47 PM CST, David Colombo via Personal_Submersibles wrote: Cliff, thanks. Thats the same as I purchased. Where did you source your radial fan?? Wyvonne laughed when I told her I would be sitting in the sub for 12 hrs like Cliff. Here first response was can't you find someone to trade places 1/2 way through? LOL I will look into that other scrubber material. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Mon, Dec 14, 2020 at 8:08 AM Cliff Redus via Personal_Submersibles wrote: David, the scrubber on the R300 holds 3.5 lbs of SodaSorb HP.? The longest I have been submerged was 12.5 hours during a pool test.? The longest I have been submerged for a normal dive event is 5 hours at one of the Islamorada PSub conventions.? My NOP is to discard partially consumed absorbent at the start of each dive day regardless of how many hours used and refill.? I keep spare absorbent in sealed bags onboard sufficient to last 80 hours (8 hours normal dive time plus 72 hours emergency time).? Due to W.R. Grace, the manufacture of SodaSorb HP, stopping manufacturing of this CO2 absorbent, I have switched to DiveSorb Pro from Dragger.? I have no experience with the new absorbent but plan on doing some shop testing prior to my next dive.? If you are interested, I have a report on my life support system where I have documented the system as well as all testing.? ?If you are interest, I would be glad to send it to you if you will contact me off list.? The scrubber design I used is based on the scrubber in Snoopy.? ?It is a radial flow charcoal filter container with a blower that discharges the clean air from the top.? After I got the right blower speced for the unit, the scrubber has worked great. The filter container is 6" OD x 7-1/2" height, with 4" ID for annulus that contain the absorbent.? The one I use is like?iPower 4" 6" 8" 10" 12" Inch Air Carbon Filter Virgin Charcoal for Inline Fan | eBay | | | | $32.99 | | | | | | | iPower 4" 6" 8" 10" 12" Inch Air Carbon Filter Virgin Charcoal for Inlin... Professional grade filter that will handle the nastiest odors produced by the prettiest plants. ?Durability? iPo... | | | I am a big believer in shop life support tests so that you know the actual performance limits of your life support system.? I would encourage all phubbers to do this qualification work prior to normal dive operations.? It is actually a lot of fun to conduct these test.? I find there has been no problem in getting volunteers for these life support test which need to be done in a controlled environment for safety purposes. On Sunday, December 13, 2020, 09:14:10 PM CST, David Colombo via Personal_Submersibles wrote: Hi Guys, I was following Jon's thread and thought how appropriate.? I am building a scrubber for the VAST sub. The housing I acquired was a carbon filter used in the grow industry.? With an interior screen core for the air to flow thru to the sodasorb core to the outside screen. The volume of this space holds 3.6 lbs of carbon. Not sure if the weight per volume of the sodasorb is exactly the same, but if it is that chamber would produce about 14.4 hours of absorption. I'm am thinking that I am going to cut the unit in half. My thinking is that for a typical day of diving, 14 hrs seem a bit excessive and I would be wasting? a lot of sorb.? With pre packaged, vacuumed bags I can carry what would be required to meet ABS guidelines.? One of my concerns though is that with the compactness of the VAST sub with a reduced volume of sorb, would the heat generated be greater than with more sorb, thereby also increasing the humidity buildup.I am hoping to get some experience feedback from other small owners, and what they have used volume wise of the sorb for a typical day of diving. The co2 unit I am using measures humidity as well as co2 ppm.?Attached are pictures of the unit ready to have the fan attached.Best Regards,David Colombo _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: 1607961600404blob.jpg Type: image/jpeg Size: 847463 bytes Desc: not available URL: From personal_submersibles at psubs.org Tue Dec 15 03:08:04 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Tue, 15 Dec 2020 00:08:04 -0800 Subject: [PSUBS-MAILIST] OTS Magncom sw-1000 Message-ID: Ok guys my pair of units arrived today. This military grade unit is supposed to be able to transmit 70w 3000ft on channel A 25hz. The transducer on this these are twice the size of the sb units. Also the battery pack is a li battery pack of 10 batteries, 12v at 2.2Ah. I contacted the mfg, only to discover that they were custom built for OTS and can be purchased only from them if you are military. Tomorrow I plan on tearing down the battery as it appears to have a BMS under the shrink wrap. The other interesting thing is you can connect two diver units together and they can talk to each other which opens some doors for an external comms port in the event of an emergency communication with sub and diver unit. Looks like I might be going to the lake to see if these things are true since I just bought them as parts. David -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image9088266424553652807.jpg Type: image/jpeg Size: 322161 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image7867760779191013971.jpg Type: image/jpeg Size: 193406 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image8408584818111403651.jpg Type: image/jpeg Size: 260606 bytes Desc: not available URL: From personal_submersibles at psubs.org Tue Dec 15 10:21:11 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Tue, 15 Dec 2020 15:21:11 +0000 Subject: [PSUBS-MAILIST] OTS Magncom sw-1000 In-Reply-To: References: Message-ID: David - Where did you find these? 70W is nice. It's a shame that you can't get OTS channel 1 on them. I like the hardwire diver to diver for secure comms. The new magnacom units coming out next year have a secure channel which is electronically scrambled and then transmitted acoustically, but you can never get more secure than hardwire. That said, it sounds like the external port idea might work using the diver to diver connector, as the manual (attached) talks about duplex hardwire multiple diver connection using this port, which should work with anything. As a diver, I see a definite advantage in the ability to establish a direct hardwire link between a disabled sub and the surface (where depths permit), versus trying to do everything acoustically where you are affecting intelligibility on top of already compromised intelligibility due to helium voice on the diver side. I was surprised to read, however, that the earphone / microphone assembly worn by a diver using this unit may need to be specific to it. Unless I misunderstand (STEP 3, Section 3.3), it sounds like the regular earphone / microphone assemblies that are compatible with all the other comm systems won't work with this unit? Sean -------- Original Message -------- On Dec. 15, 2020, 01:08, David Colombo via Personal_Submersibles wrote: > Ok guys my pair of units arrived today. This military grade unit is supposed to be able to transmit 70w 3000ft on channel A 25hz. The transducer on this these are twice the size of the sb units. Also the battery pack is a li battery pack of 10 batteries, 12v at 2.2Ah. I contacted the mfg, only to discover that they were custom built for OTS and can be purchased only from them if you are military. Tomorrow I plan on tearing down the battery as it appears to have a BMS under the shrink wrap. The other interesting thing is you can connect two diver units together and they can talk to each other which opens some doors for an external comms port in the event of an emergency communication with sub and diver unit. Looks like I might be going to the lake to see if these things are true since I just bought them as parts. > David -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: SW-1000-SC-rev-L.pdf Type: application/pdf Size: 801666 bytes Desc: not available URL: From personal_submersibles at psubs.org Tue Dec 15 10:33:55 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Tue, 15 Dec 2020 15:33:55 +0000 Subject: [PSUBS-MAILIST] OTS Magncom sw-1000 In-Reply-To: References: Message-ID: Sorry - just wanted to clarify... If you were using this unit for acoustic comms with your own surface support, so not broadcasting on OTS channel 1 as per the PSubs standard, but still better than most for that 1:1 communication because of the strength of those units (they are supposedly exclusively US Navy), a rescue scenario within divable depth (like a PSubs event with a depth limit) might entail sending a diver down on hardwire channel 1, with a second com rope on hardwire channel 2 to connect to the port just to establish direct communications with the surface while the rest of the rescue plan is played out. The SSB-2010 units don't have that capability, though I suppose you only need a bulkhead port on the sub directly connected to an internal headset to duplicate it. Sean -------- Original Message -------- On Dec. 15, 2020, 08:21, Sean T. Stevenson wrote: > David - Where did you find these? > > 70W is nice. It's a shame that you can't get OTS channel 1 on them. I like the hardwire diver to diver for secure comms. The new magnacom units coming out next year have a secure channel which is electronically scrambled and then transmitted acoustically, but you can never get more secure than hardwire. > > That said, it sounds like the external port idea might work using the diver to diver connector, as the manual (attached) talks about duplex hardwire multiple diver connection using this port, which should work with anything. As a diver, I see a definite advantage in the ability to establish a direct hardwire link between a disabled sub and the surface (where depths permit), versus trying to do everything acoustically where you are affecting intelligibility on top of already compromised intelligibility due to helium voice on the diver side. > > I was surprised to read, however, that the earphone / microphone assembly worn by a diver using this unit may need to be specific to it. Unless I misunderstand (STEP 3, Section 3.3), it sounds like the regular earphone / microphone assemblies that are compatible with all the other comm systems won't work with this unit? > > Sean > > -------- Original Message -------- > On Dec. 15, 2020, 01:08, David Colombo via Personal_Submersibles wrote: > >> Ok guys my pair of units arrived today. This military grade unit is supposed to be able to transmit 70w 3000ft on channel A 25hz. The transducer on this these are twice the size of the sb units. Also the battery pack is a li battery pack of 10 batteries, 12v at 2.2Ah. I contacted the mfg, only to discover that they were custom built for OTS and can be purchased only from them if you are military. Tomorrow I plan on tearing down the battery as it appears to have a BMS under the shrink wrap. The other interesting thing is you can connect two diver units together and they can talk to each other which opens some doors for an external comms port in the event of an emergency communication with sub and diver unit. Looks like I might be going to the lake to see if these things are true since I just bought them as parts. >> David -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 15 15:42:31 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Tue, 15 Dec 2020 12:42:31 -0800 Subject: [PSUBS-MAILIST] OTS Magncom sw-1000 In-Reply-To: References: Message-ID: Hi Sean, I read the same thing about the headset. I will test that. I hope the headsets that I already have will work. The plan is that I already have the OTS SSB2010 unit installed and is operational along with the topside unit, which has only channels 1-4 active. The Magnacom is a backup unit that would be used if topside is having issues with the comms, due to distance, otherwise channel 1 is the priority. Also as a backup the topside diver unit could be taken via a diver to the sub location in an EVENT and have the direct link with the sub via an external port. If I had a way to add the 25hz to my topside unit I would. I just like the ability of greater 70w power and range as backup. The LI battery pack is of real interest to me, as I believe it has an integrated bms for the 10 cells, and if it's what I think it is it could be adapted to the SSB2010 unit for greater talk time. From experience, my VHF handhelds are advertised with a greater range of power @ 5w when the batteries are the rechargeable type vs 1w for regular batteries. Not sure if it's the battery density or the power curve before the power drops off that is giving more watts. I will know shortly if the transducer can be removed and an extension cable added, which will make the use as a topside unit more functionable. Unfortunately this is the first time I have seen these units available, and since I can't purchase replacement parts due to the military issue, this might be a one off project. But will be fun to play with. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Tue, Dec 15, 2020 at 7:34 AM Sean T. Stevenson via Personal_Submersibles wrote: > Sorry - just wanted to clarify... If you were using this unit for acoustic > comms with your own surface support, so not broadcasting on OTS channel 1 > as per the PSubs standard, but still better than most for that 1:1 > communication because of the strength of those units (they are supposedly > exclusively US Navy), a rescue scenario within divable depth (like a PSubs > event with a depth limit) might entail sending a diver down on hardwire > channel 1, with a second com rope on hardwire channel 2 to connect to the > port just to establish direct communications with the surface while the > rest of the rescue plan is played out. > > The SSB-2010 units don't have that capability, though I suppose you only > need a bulkhead port on the sub directly connected to an internal headset > to duplicate it. > > Sean > > -------- Original Message -------- > On Dec. 15, 2020, 08:21, Sean T. Stevenson < > sean.t.stevenson at protonmail.com> wrote: > > > David - Where did you find these? > > 70W is nice. It's a shame that you can't get OTS channel 1 on them. I like > the hardwire diver to diver for secure comms. The new magnacom units coming > out next year have a secure channel which is electronically scrambled and > then transmitted acoustically, but you can never get more secure than > hardwire. > > That said, it sounds like the external port idea might work using the > diver to diver connector, as the manual (attached) talks about duplex > hardwire multiple diver connection using this port, which should work with > anything. As a diver, I see a definite advantage in the ability to > establish a direct hardwire link between a disabled sub and the surface > (where depths permit), versus trying to do everything acoustically where > you are affecting intelligibility on top of already compromised > intelligibility due to helium voice on the diver side. > > I was surprised to read, however, that the earphone / microphone assembly > worn by a diver using this unit may need to be specific to it. Unless I > misunderstand (STEP 3, Section 3.3), it sounds like the regular earphone / > microphone assemblies that are compatible with all the other comm systems > won't work with this unit? > > Sean > > -------- Original Message -------- > On Dec. 15, 2020, 01:08, David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > > Ok guys my pair of units arrived today. This military grade unit is > supposed to be able to transmit 70w 3000ft on channel A 25hz. The > transducer on this these are twice the size of the sb units. Also the > battery pack is a li battery pack of 10 batteries, 12v at 2.2Ah. I > contacted the mfg, only to discover that they were custom built for OTS and > can be purchased only from them if you are military. Tomorrow I plan on > tearing down the battery as it appears to have a BMS under the shrink wrap. > The other interesting thing is you can connect two diver units together and > they can talk to each other which opens some doors for an external comms > port in the event of an emergency communication with sub and diver unit. > Looks like I might be going to the lake to see if these things are true > since I just bought them as parts. > David > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 16 12:35:59 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Wed, 16 Dec 2020 09:35:59 -0800 Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery Message-ID: Hi guys, I torn down the one battery I got with my magnacom units so I can build a couple more. Attached are photos of the teardown. Only problem is one component that only had labeling on one side. The other side had only the letters va with a smudge over other data. I think it's a fuse based on the fact it interrupts the circuit. I sketched out the circuit for reference. I thought taught there might be a BMS, but apparently not. Jon, to recreate the circuit board component, would you recommend having done by a fabricator? Any ideas or thoughts would be appreciated. Thanks, David -------------- next part -------------- An HTML attachment was scrubbed... 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Name: Image3680111788714729103.jpg Type: image/jpeg Size: 201991 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image5161974575951923905.jpg Type: image/jpeg Size: 201991 bytes Desc: not available URL: From personal_submersibles at psubs.org Wed Dec 16 16:23:28 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Wed, 16 Dec 2020 11:23:28 -1000 Subject: [PSUBS-MAILIST] strain relief fittings Message-ID: As mentioned before, I goofed up and welded 7 ss female threaded thru hull fittings in for the Sealcon strain relief fittings before checking that they weren't rated for more than 10 bar which has an IP rating of 68. Since I have a bunch of these already, I plan on using them on the inside as a backup and going with the Blue Globe as recommended by some on this forum because they will take the 300 psi that my sub will see. Since Blue Globe is metric, I will need to machine some short ss stubs with the proper metric threads and weld them onto the outsides of my NPT thru hulls so I can take the proper rated fittings. I have 4 cables that will have to pass through, 2 @ 4.11 mm, 1 @ 4.87 mm and three @ 5 mm. Can someone recommend who to call to get these sizes in a Blue Globe here in the U.S? Thanks Rick -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 16 17:23:13 2020 From: personal_submersibles at psubs.org (irox via Personal_Submersibles) Date: Wed, 16 Dec 2020 17:23:13 -0500 (EST) Subject: [PSUBS-MAILIST] strain relief fittings Message-ID: <1993429549.4091.1608157393394@wamui-teddy.atl.sa.earthlink.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 16 20:06:44 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Wed, 16 Dec 2020 15:06:44 -1000 Subject: [PSUBS-MAILIST] strain relief fittings In-Reply-To: <1993429549.4091.1608157393394@wamui-teddy.atl.sa.earthlink.net> References: <1993429549.4091.1608157393394@wamui-teddy.atl.sa.earthlink.net> Message-ID: Hi Ian I spoke with them but the guy I spoke with was not able to tell me what the IP rating was. Do you have any idea what yours were rated for as far as PSI goes? Rick On Wed, Dec 16, 2020 at 12:23 PM irox via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > > Hi Rick, > > I ordered mine from automation24: > https://www.automation24.com/brass-cable-glands > https://www.automation24.com/stainless-steel-cable-glands > > Since the brass-nickel plated ones are so cheap(compared to SS), I just > bought a couple of each (smaller) size > so I could figure out what would work best. Each cable gland can cover a > range of cable sizes, so you're > likely to be able to use the same size for all cables. E.g. the M10x1 > cable gland does cables 1.5-6mm, the M12x1.5 > does 2-8mm, the M16x1.5 does 4mm to 11mm. > > For the final installation I'm planning on using SS glands, although I may > use some brass-nickel-plated ones > and replacement them with SS in the future (when the rust starts to show). > > Ian. > > -----Original Message----- > From: Rick Patton via Personal_Submersibles > Sent: Dec 16, 2020 1:23 PM > To: psubs chat room > Subject: [PSUBS-MAILIST] strain relief fittings > > As mentioned before, I goofed up and welded 7 ss female threaded thru hull > fittings in for the Sealcon strain relief fittings before checking that > they weren't rated for more than 10 bar which has an IP rating of 68. > Since I have a bunch of these already, I plan on using them on the inside > as a backup and going with the Blue Globe as recommended by some on this > forum because they will take the 300 psi that my sub will see. > Since Blue Globe is metric, I will need to machine some short ss stubs > with the proper metric threads and weld them onto the outsides of my NPT > thru hulls so I can take the proper rated fittings. > I have 4 cables that will have to pass through, 2 @ 4.11 mm, 1 @ 4.87 mm > and three @ 5 mm. Can someone recommend who to call to get these sizes in a > Blue Globe here in the U.S? > Thanks > > Rick > > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 16 20:28:57 2020 From: personal_submersibles at psubs.org (irox via Personal_Submersibles) Date: Wed, 16 Dec 2020 17:28:57 -0800 (GMT-08:00) Subject: [PSUBS-MAILIST] strain relief fittings Message-ID: <1296621729.4938.1608168537944@wamui-teddy.atl.sa.earthlink.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 17 08:02:31 2020 From: personal_submersibles at psubs.org (hank pronk via Personal_Submersibles) Date: Thu, 17 Dec 2020 13:02:31 +0000 (UTC) Subject: [PSUBS-MAILIST] (no subject) References: <1019381741.1742183.1608210151095.ref@mail.yahoo.com> Message-ID: <1019381741.1742183.1608210151095@mail.yahoo.com> ? ? ? ? ? ? 4:58Now playing Watch later Watch later Add to queue Add to queue ? ? ? ? Hi All,?I am venturing out of my comfort zone a bit and am building a work class ROV to support E3000.The ROV is 600 lbs and has one of my electric arms. ?The beauty of this is, I can carry and launch it off my Landing Craft.Hank -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 17 12:54:06 2020 From: personal_submersibles at psubs.org (Tim Novak via Personal_Submersibles) Date: Thu, 17 Dec 2020 09:54:06 -0800 Subject: [PSUBS-MAILIST] (no subject) In-Reply-To: <1019381741.1742183.1608210151095@mail.yahoo.com> References: <1019381741.1742183.1608210151095.ref@mail.yahoo.com> <1019381741.1742183.1608210151095@mail.yahoo.com> Message-ID: <004e01d6d49d$9d5e5f50$d81b1df0$@telus.net> Very cool, Hank. Tim From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of hank pronk via Personal_Submersibles Sent: Thursday, December 17, 2020 5:03 AM To: Personal Submersibles General Discussion Subject: [PSUBS-MAILIST] (no subject) 4:58 Now playing Watch later Watch later Add to queue Add to queue Hi All, I am venturing out of my comfort zone a bit and am building a work class ROV to support E3000. The ROV is 600 lbs and has one of my electric arms. The beauty of this is, I can carry and launch it off my Landing Craft. Hank -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 17 13:13:46 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Thu, 17 Dec 2020 08:13:46 -1000 Subject: [PSUBS-MAILIST] strain relief fittings In-Reply-To: <1296621729.4938.1608168537944@wamui-teddy.atl.sa.earthlink.net> References: <1296621729.4938.1608168537944@wamui-teddy.atl.sa.earthlink.net> Message-ID: Thanks Ian Maybe I am being over protective now because I didn't pay enough attention before and got under rated fittings. I couldn't find a diffident rating for the IP 69K as far as bars or psi goes but this data sheet spells it out better. Thanks Rick On Wed, Dec 16, 2020 at 3:29 PM irox via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > > Hi Rick, > > I've been going off of this data sheet: > https://media.automation24.com/datasheet/us/blueglobe.pdf > > I note the SS ones are listed as IP68K, but the brass-nickel ones are > listed as IP68. > > I found some test info on page 67 of the datasheet: > "blueglobe complies with protection class > IP 68. The glands are absolutely dust-proof and > water-proof down to 150 m (15 bar). > Test samples made of PA, brass and stainless > steel passed the IP 69K test in accordance with > DIN 40050 Part 9 at 100 bar water pressure, > +80 ?C for 2 minutes in the PFLITSCH testing > laboratory." > > I'm interpreting this as they are rated for 150m (15bar) operational use, > but were tested in lab conditions to 100bar and they didn't fail. > > Ian. > > > -----Original Message----- > From: Rick Patton via Personal_Submersibles > Sent: Dec 16, 2020 5:06 PM > To: Personal Submersibles General Discussion > Subject: Re: [PSUBS-MAILIST] strain relief fittings > > Hi Ian > > I spoke with them but the guy I spoke with was not able to tell me what > the IP rating was. Do you have any idea what yours were rated for as far as > PSI goes? > > Rick > > > On Wed, Dec 16, 2020 at 12:23 PM irox via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> >> Hi Rick, >> >> I ordered mine from automation24: >> https://www.automation24.com/brass-cable-glands >> https://www.automation24.com/stainless-steel-cable-glands >> >> Since the brass-nickel plated ones are so cheap(compared to SS), I just >> bought a couple of each (smaller) size >> so I could figure out what would work best. Each cable gland can cover a >> range of cable sizes, so you're >> likely to be able to use the same size for all cables. E.g. the M10x1 >> cable gland does cables 1.5-6mm, the M12x1.5 >> does 2-8mm, the M16x1.5 does 4mm to 11mm. >> >> For the final installation I'm planning on using SS glands, although I >> may use some brass-nickel-plated ones >> and replacement them with SS in the future (when the rust starts to show). >> >> Ian. >> >> -----Original Message----- >> From: Rick Patton via Personal_Submersibles >> Sent: Dec 16, 2020 1:23 PM >> To: psubs chat room >> Subject: [PSUBS-MAILIST] strain relief fittings >> >> As mentioned before, I goofed up and welded 7 ss female threaded thru >> hull fittings in for the Sealcon strain relief fittings before checking >> that they weren't rated for more than 10 bar which has an IP rating of 68. >> Since I have a bunch of these already, I plan on using them on the inside >> as a backup and going with the Blue Globe as recommended by some on this >> forum because they will take the 300 psi that my sub will see. >> Since Blue Globe is metric, I will need to machine some short ss stubs >> with the proper metric threads and weld them onto the outsides of my NPT >> thru hulls so I can take the proper rated fittings. >> I have 4 cables that will have to pass through, 2 @ 4.11 mm, 1 @ 4.87 mm >> and three @ 5 mm. Can someone recommend who to call to get these sizes in a >> Blue Globe here in the U.S? >> Thanks >> >> Rick >> >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 18 15:02:53 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Fri, 18 Dec 2020 20:02:53 +0000 (UTC) Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: References: Message-ID: <1833419028.2339107.1608321773822@mail.yahoo.com> David,?can you just wire them in to 12V in the boat & forget about the battery packs, or are you intending to use them for scuba diving.?Alan On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi guys, I torn down the one battery I got with my magnacom units so I can build a couple more.? Attached are photos of the teardown. Only problem is one component that only had labeling on one side. The other side had only the letters va with a smudge over other data. I think it's a fuse based on the fact it interrupts the circuit.? I sketched out the circuit for reference. I thought taught there might be a BMS, but apparently not.? Jon, to recreate the circuit board component, would you recommend having done by a fabricator? Any ideas or thoughts would be appreciated.Thanks,David_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 18 15:22:48 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Fri, 18 Dec 2020 12:22:48 -0800 Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: <1833419028.2339107.1608321773822@mail.yahoo.com> References: <1833419028.2339107.1608321773822@mail.yahoo.com> Message-ID: Hi Alan, The unit in the sub I can. The topside unit I was hoping to keep the unit intact in case it could also be used as a diver unit. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Fri, Dec 18, 2020 at 12:03 PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > David, > can you just wire them in to 12V in the boat & forget about the battery > packs, or are you intending to use them for scuba diving. > Alan > > On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via > Personal_Submersibles wrote: > > > Hi guys, I torn down the one battery I got with my magnacom units so I can > build a couple more. Attached are photos of the teardown. Only problem is > one component that only had labeling on one side. The other side had only > the letters va with a smudge over other data. I think it's a fuse based on > the fact it interrupts the circuit. I sketched out the circuit for > reference. I thought taught there might be a BMS, but apparently not. Jon, > to recreate the circuit board component, would you recommend having done by > a fabricator? Any ideas or thoughts would be appreciated. > Thanks, > David > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 18 18:52:32 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Fri, 18 Dec 2020 23:52:32 +0000 (UTC) Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: References: <1833419028.2339107.1608321773822@mail.yahoo.com> Message-ID: <2100435221.2383810.1608335552891@mail.yahoo.com> David,?I have been making up packs of lithium iron batteries and they don't require any electronics other than the external balance charger. You just need to solder on balancing charge leads between the +&- on each battery & the appropriate connector. There are a few different sizes & types of lithium iron batteries. You may find a square type of rc hobby lithium battery of the correct size & voltage off the shelf. Can help a bit more if you aren't familiar with rc lithium iron batteries.?Alan On Saturday, December 19, 2020, 09:24:43 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi Alan, The unit in the sub I can. The topside unit I was hoping to keep the unit intact in case it could also be used as a diver unit. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Fri, Dec 18, 2020 at 12:03 PM Alan James via Personal_Submersibles wrote: David,?can you just wire them in to 12V in the boat & forget about the battery packs, or are you intending to use them for scuba diving.?Alan On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi guys, I torn down the one battery I got with my magnacom units so I can build a couple more.? Attached are photos of the teardown. Only problem is one component that only had labeling on one side. The other side had only the letters va with a smudge over other data. I think it's a fuse based on the fact it interrupts the circuit.? I sketched out the circuit for reference. I thought taught there might be a BMS, but apparently not.? Jon, to recreate the circuit board component, would you recommend having done by a fabricator? Any ideas or thoughts would be appreciated.Thanks,David_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 18 19:46:19 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Sat, 19 Dec 2020 00:46:19 +0000 Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: <2100435221.2383810.1608335552891@mail.yahoo.com> References: <1833419028.2339107.1608321773822@mail.yahoo.com> <2100435221.2383810.1608335552891@mail.yahoo.com> Message-ID: <9K8W9np-m-BDzW_E-Ckg_RCI9z67LBdjixfW718eDBn5Ix0_RGXl6WjG12mAyA7olVXXsZ1_Ez9iEpbnXh5QIRwHXGASA6Y5K8W8KU8V0eI=@protonmail.com> I have made packs before using Saft cells (which IMO are some of the best out there), but the nominal cell voltages of lithium technology cells do not match standard alkalines, so you have to choose your cell type and number of cells in series so that the pack overall comes out the same. Sean -------- Original Message -------- On Dec. 18, 2020, 16:52, Alan James via Personal_Submersibles wrote: > David, > I have been making up packs of lithium iron batteries and they don't require any electronics other than the external balance charger. You just need to solder on balancing charge leads between the +&- on each battery & the appropriate connector. There are a few different sizes & types of lithium iron batteries. You may find a square type of rc hobby lithium battery of the correct size & voltage off the shelf. Can help a bit more if you aren't familiar with rc lithium iron batteries. > Alan > > On Saturday, December 19, 2020, 09:24:43 AM GMT+13, David Colombo via Personal_Submersibles wrote: > > Hi Alan, The unit in the sub I can. The topside unit I was hoping to keep the unit intact in case it could also be used as a diver unit. > > Best Regards, > David Colombo > > 804 College Ave > Santa Rosa, CA. 95404 > (707) 536-1424 > www.SeaQuestor.com > > On Fri, Dec 18, 2020 at 12:03 PM Alan James via Personal_Submersibles wrote: > >> David, >> can you just wire them in to 12V in the boat & forget about the battery packs, or are you intending to use them for scuba diving. >> Alan >> >> On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via Personal_Submersibles wrote: >> >> Hi guys, I torn down the one battery I got with my magnacom units so I can build a couple more. Attached are photos of the teardown. Only problem is one component that only had labeling on one side. The other side had only the letters va with a smudge over other data. I think it's a fuse based on the fact it interrupts the circuit. I sketched out the circuit for reference. I thought taught there might be a BMS, but apparently not. Jon, to recreate the circuit board component, would you recommend having done by a fabricator? Any ideas or thoughts would be appreciated. >> Thanks, >> David >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 18 20:34:48 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Sat, 19 Dec 2020 01:34:48 +0000 (UTC) Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: References: <1833419028.2339107.1608321773822@mail.yahoo.com> Message-ID: <1597002541.2413067.1608341688855@mail.yahoo.com> David, the electronics may be a low voltage protection circuit, or a low high voltage protection circuit so you don't overcharge the batteries.?As Sean says, if you replace with lithium you have to match the battery voltage. Lithium Iron batteries have a nominal voltage of 3.7 but can be charged to 4.2, & discharged to a minimum of 3V. So that gives 2 options, a 3 cel or 4 cel configuration. So 4 cel would be just above 16.6V and could be used down? to 12V (very minimum) or 3 cel 12.6V & 9V minimum.?Alan On Saturday, December 19, 2020, 09:24:43 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi Alan, The unit in the sub I can. The topside unit I was hoping to keep the unit intact in case it could also be used as a diver unit. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Fri, Dec 18, 2020 at 12:03 PM Alan James via Personal_Submersibles wrote: David,?can you just wire them in to 12V in the boat & forget about the battery packs, or are you intending to use them for scuba diving.?Alan On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi guys, I torn down the one battery I got with my magnacom units so I can build a couple more.? Attached are photos of the teardown. Only problem is one component that only had labeling on one side. The other side had only the letters va with a smudge over other data. I think it's a fuse based on the fact it interrupts the circuit.? I sketched out the circuit for reference. I thought taught there might be a BMS, but apparently not.? Jon, to recreate the circuit board component, would you recommend having done by a fabricator? Any ideas or thoughts would be appreciated.Thanks,David_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 18 21:05:27 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Fri, 18 Dec 2020 18:05:27 -0800 Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: <1597002541.2413067.1608341688855@mail.yahoo.com> References: <1833419028.2339107.1608321773822@mail.yahoo.com> <1597002541.2413067.1608341688855@mail.yahoo.com> Message-ID: Hi Alan, one of the fuse is a self reset fuse based upon temperature. The other im not so sure. The original batteries were 1.2 volts (5) total for 12v. If i go with the 16050 li batteries I have as new cells, they are 3.7v, charge to 4.2, discharge to 3.0v. I was thinking that I would go with 4s2p for a total of 8 batteries at 14.8v I could be wrong, but dont I even need a bms even for this small quantity? As I have never built a Li battery before, I figured that a small unit will be the start to be a bigger battery pack. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Fri, Dec 18, 2020 at 5:35 PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > David, the electronics may be a low voltage protection circuit, or a low > high voltage protection circuit so you don't overcharge the batteries. > As Sean says, if you replace with lithium you have to match the battery > voltage. Lithium Iron batteries have a nominal voltage of 3.7 but can be > charged to 4.2, & discharged to a minimum of 3V. So that gives 2 options, a > 3 cel or 4 cel configuration. So 4 cel would be just above 16.6V and could > be used down to 12V (very minimum) or 3 cel 12.6V & 9V minimum. > Alan > > On Saturday, December 19, 2020, 09:24:43 AM GMT+13, David Colombo via > Personal_Submersibles wrote: > > > Hi Alan, The unit in the sub I can. The topside unit I was hoping to keep > the unit intact in case it could also be used as a diver unit. > > Best Regards, > David Colombo > > 804 College Ave > Santa Rosa, CA. 95404 > (707) 536-1424 > www.SeaQuestor.com > > > > On Fri, Dec 18, 2020 at 12:03 PM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > David, > can you just wire them in to 12V in the boat & forget about the battery > packs, or are you intending to use them for scuba diving. > Alan > > On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via > Personal_Submersibles wrote: > > > Hi guys, I torn down the one battery I got with my magnacom units so I can > build a couple more. Attached are photos of the teardown. Only problem is > one component that only had labeling on one side. The other side had only > the letters va with a smudge over other data. I think it's a fuse based on > the fact it interrupts the circuit. I sketched out the circuit for > reference. I thought taught there might be a BMS, but apparently not. Jon, > to recreate the circuit board component, would you recommend having done by > a fabricator? Any ideas or thoughts would be appreciated. > Thanks, > David > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sat Dec 19 14:37:45 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Sun, 20 Dec 2020 08:37:45 +1300 Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: References: <1833419028.2339107.1608321773822@mail.yahoo.com> <1597002541.2413067.1608341688855@mail.yahoo.com> Message-ID: <7B16E3E4-B349-43CA-A006-735CEEF2B72B@yahoo.com> Hi David, using a 2 cel configuration to illistrate; the most basic set up with lithium batteries would be to have 2 cels in series with the main positive & negative wires coming off the ends. Additionally there would be 3 smaller gauge wires running from the positive, the negative & the point where the two batteries join. These smaller wires go to a particular connector compatible with a balance charger. The balance charger reads the voltage of each individual battery & draws current away from over charged batteries and adds it to under charged batteries. The balance charging is needed because lithium batteries can go out of sink in time to the point where one battery gets charged to a dangerously high level & another gets low in comparison & can be damaged by being run too low. I have lithium packs with just these balancing wires added but in the applications I'm using them on (drones & lights) that's all I need as I have a flight controller on the drones checking the power level & volt meters on the lights. Most rc lithium battery packs just have the added balancing wires. What you need additionally depends on what electronics is already in the module. A low voltage indicator or cut-off is important. In some of my uses the high & low voltage limits are programmable. Am mentioning this in case any integrated circuits in your current electronics are pre-programmed. Alan On Saturday, December 19, 2020, 03:07:26 PM GMT+13, David Colombo via Personal_Submersibles wrote: Hi Alan, one of the fuse is a self reset fuse based upon temperature. The other im not so sure. The original batteries were 1.2 volts (5) total for 12v. If i go with the 16050 li batteries I have as new cells, they are 3.7v, charge to 4.2, discharge to 3.0v. I was thinking that I would go with 4s2p for a total of 8 batteries at 14.8v I could be wrong, but dont I even need a bms even for this small quantity? As I have never built a Li battery before, I figured that a small unit will be the start to be a bigger battery pack. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Fri, Dec 18, 2020 at 5:35 PM Alan James via Personal_Submersibles wrote: David, the electronics may be a low voltage protection circuit, or a low high voltage protection circuit so you don't overcharge the batteries. As Sean says, if you replace with lithium you have to match the battery voltage. Lithium Iron batteries have a nominal voltage of 3.7 but can be charged to 4.2, & discharged to a minimum of 3V. So that gives 2 options, a 3 cel or 4 cel configuration. So 4 cel would be just above 16.6V and could be used down to 12V (very minimum) or 3 cel 12.6V & 9V minimum. Alan On Saturday, December 19, 2020, 09:24:43 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi Alan, The unit in the sub I can. The topside unit I was hoping to keep the unit intact in case it could also be used as a diver unit. Best Regards, David Colombo 804 College Ave Santa Rosa, CA. 95404 (707) 536-1424 www.SeaQuestor.com On Fri, Dec 18, 2020 at 12:03 PM Alan James via Personal_Submersibles wrote: David, can you just wire them in to 12V in the boat & forget about the battery packs, or are you intending to use them for scuba diving. Alan On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi guys, I torn down the one battery I got with my magnacom units so I can build a couple more. Attached are photos of the teardown. Only problem is one component that only had labeling on one side. The other side had only the letters va with a smudge over other data. I think it's a fuse based on the fact it interrupts the circuit. I sketched out the circuit for reference. I thought taught there might be a BMS, but apparently not. Jon, to recreate the circuit board component, would you recommend having done by a fabricator? Any ideas or thoughts would be appreciated. Thanks, David _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 21 14:20:19 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Mon, 21 Dec 2020 19:20:19 +0000 (UTC) Subject: [PSUBS-MAILIST] Magnacom SW-1000-sc Battery In-Reply-To: References: Message-ID: <1710983020.3139485.1608578419809@mail.yahoo.com> David,?how are you going with your battery problem.?Did a little bit of googling on NIMH batteries & found this....?Unfortunately?charging NiMH nickel metal hydride batteries?is not as easy to achieve compared to other types of cell or?battery. The?NiMH?cells, like NiCds?require charging?using a constant current. The rate of?charge?is normally specified on the case of the cell and this rate should not be exceeded. It looks to me that the electronics would be a constant current charging circuit. Maybe it has an over voltage cut out.?You could possibly leave the circuit out & buy a Nimh charger suitable for 12V & take them out & charge them.?Alan On Thursday, December 17, 2020, 06:39:22 AM GMT+13, David Colombo via Personal_Submersibles wrote: Hi guys, I torn down the one battery I got with my magnacom units so I can build a couple more.? Attached are photos of the teardown. Only problem is one component that only had labeling on one side. The other side had only the letters va with a smudge over other data. I think it's a fuse based on the fact it interrupts the circuit.? I sketched out the circuit for reference. I thought taught there might be a BMS, but apparently not.? Jon, to recreate the circuit board component, would you recommend having done by a fabricator? Any ideas or thoughts would be appreciated.Thanks,David_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 21 16:48:37 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Mon, 21 Dec 2020 21:48:37 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1832385415.4656162.1607133789968@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> Message-ID: <496372579.3207998.1608587317374@mail.yahoo.com> I have finished the SEMJR software and uploaded it to the web site along with instructions of how to load the software on the Teensy 4.0 microprocessor.? If you are familiar with the Arduino IDE you will find it a fairly simple and standard process.? If you are not familiar with the Arduino IDE or programming, you may find the procedure a bit daunting but stick with it and just follow the instructions step-by-step.? If you just can't get it and are unsuccessful, consider reaching out to someone who has been successful and ask them to load the software on your microprocessor for you. You can also reach out to the mailing list, or Facebook page, and seek help getting the loader running from others that are familiar with the Arduino IDE, including myself.? We will need to know what operating system you are using (MAC, UNIX, Windows) and also what version of that operating system you have. I still need to draft an Operating Manual for the project, although if you can get the software loaded it should all just work without any other configuration. I have changed the menus so that O2, CO2, and Po (change in cabin pressure) appear on one menu; Barometer, Humidity, and Temperature appear on the second menu.? See website for new menu display.? By default, the menus cycle automatically with each being displayed for four seconds.? You can add a momentary button to the project to manually cycle through the menus, or keep one menu displayed on purpose. Three alarms are built into the software.? If an alarm is set, the alarm menu displays the sensor that caused the alarm and holds on that menu until all alarms have fallen within acceptable limits.? In other words, if the alarm menu is displayed, no other menus are accessible until all alarms have been extinguished.? If you get an alarm, SURFACE and deal with it there.O2 alarms at 19.0 and 23.0 percent.CO2 alarms at 5000 ppmPo alarms at 2psi (137mbar) below or above whatever the pressure was when you started the dive I'm working on a couple of videos to help envision all this stuff, but...you know how it goes.? Video editing is painfully slow, as is the PDF documentation.? sigh...geeeeesh..... Jon -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 21 17:31:04 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Mon, 21 Dec 2020 22:31:04 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <496372579.3207998.1608587317374@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> <496372579.3207998.1608587317374@mail.yahoo.com> Message-ID: <551960502.3158994.1608589864992@mail.yahoo.com> Thanks Jon,?that's a great result.?An inexpensive way to monitor all the main environmental conditions!?Alan On Tuesday, December 22, 2020, 10:50:28 AM GMT+13, Jon Wallace via Personal_Submersibles wrote: I have finished the SEMJR software and uploaded it to the web site along with instructions of how to load the software on the Teensy 4.0 microprocessor.? If you are familiar with the Arduino IDE you will find it a fairly simple and standard process.? If you are not familiar with the Arduino IDE or programming, you may find the procedure a bit daunting but stick with it and just follow the instructions step-by-step.? If you just can't get it and are unsuccessful, consider reaching out to someone who has been successful and ask them to load the software on your microprocessor for you. You can also reach out to the mailing list, or Facebook page, and seek help getting the loader running from others that are familiar with the Arduino IDE, including myself.? We will need to know what operating system you are using (MAC, UNIX, Windows) and also what version of that operating system you have. I still need to draft an Operating Manual for the project, although if you can get the software loaded it should all just work without any other configuration. I have changed the menus so that O2, CO2, and Po (change in cabin pressure) appear on one menu; Barometer, Humidity, and Temperature appear on the second menu.? See website for new menu display.? By default, the menus cycle automatically with each being displayed for four seconds.? You can add a momentary button to the project to manually cycle through the menus, or keep one menu displayed on purpose. Three alarms are built into the software.? If an alarm is set, the alarm menu displays the sensor that caused the alarm and holds on that menu until all alarms have fallen within acceptable limits.? In other words, if the alarm menu is displayed, no other menus are accessible until all alarms have been extinguished.? If you get an alarm, SURFACE and deal with it there.O2 alarms at 19.0 and 23.0 percent.CO2 alarms at 5000 ppmPo alarms at 2psi (137mbar) below or above whatever the pressure was when you started the dive I'm working on a couple of videos to help envision all this stuff, but...you know how it goes.? Video editing is painfully slow, as is the PDF documentation.? sigh...geeeeesh..... Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 21 17:56:46 2020 From: personal_submersibles at psubs.org (Philippe Robert via Personal_Submersibles) Date: Mon, 21 Dec 2020 17:56:46 -0500 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <551960502.3158994.1608589864992@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> <496372579.3207998.1608587317374@mail.yahoo.com> <551960502.3158994.1608589864992@mail.yahoo.com> Message-ID: Thank Jon for sharing your work ! I have a question about the Teensy 4.0 microprocessor. What is the benefit to use the teensy instead of arduino Atmel based microcontroller ? Regards Philippe Le lun. 21 d?c. 2020 ? 17:31, Alan James via Personal_Submersibles < personal_submersibles at psubs.org> a ?crit : > Thanks Jon, > that's a great result. > An inexpensive way to monitor all the main environmental conditions! > Alan > > On Tuesday, December 22, 2020, 10:50:28 AM GMT+13, Jon Wallace via > Personal_Submersibles wrote: > > > I have finished the SEMJR software and uploaded it to the web site along > with instructions of how to load the software on the Teensy 4.0 > microprocessor. If you are familiar with the Arduino IDE you will find it > a fairly simple and standard process. If you are not familiar with the > Arduino IDE or programming, you may find the procedure a bit daunting but > stick with it and just follow the instructions step-by-step. If you just > can't get it and are unsuccessful, consider reaching out to someone who has > been successful and ask them to load the software on your microprocessor > for you. > > You can also reach out to the mailing list, or Facebook page, and seek > help getting the loader running from others that are familiar with the > Arduino IDE, including myself. We will need to know what operating system > you are using (MAC, UNIX, Windows) and also what version of that operating > system you have. > > I still need to draft an Operating Manual for the project, although if you > can get the software loaded it should all just work without any other > configuration. > > I have changed the menus so that O2, CO2, and Po (change in cabin > pressure) appear on one menu; Barometer, Humidity, and Temperature appear > on the second menu. See website for new menu display. By default, the > menus cycle automatically with each being displayed for four seconds. You > can add a momentary button to the project to manually cycle through the > menus, or keep one menu displayed on purpose. > > Three alarms are built into the software. If an alarm is set, the alarm > menu displays the sensor that caused the alarm and holds on that menu until > all alarms have fallen within acceptable limits. In other words, if the > alarm menu is displayed, no other menus are accessible until all alarms > have been extinguished. If you get an alarm, SURFACE and deal with it > there. > O2 alarms at 19.0 and 23.0 percent. > CO2 alarms at 5000 ppm > Po alarms at 2psi (137mbar) below or above whatever the pressure was when > you started the dive > > I'm working on a couple of videos to help envision all this stuff, > but...you know how it goes. Video editing is painfully slow, as is the PDF > documentation. sigh...geeeeesh..... > > Jon > > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 21 18:51:12 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Mon, 21 Dec 2020 23:51:12 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> <496372579.3207998.1608587317374@mail.yahoo.com> <551960502.3158994.1608589864992@mail.yahoo.com> Message-ID: <1796243548.3253230.1608594672592@mail.yahoo.com> Philippe, I chose Teensy for this project because it offered the biggest "bang for the buck" in terms of functionality and performance.? Teensy 4.0 has a 32bit-600 mhz processor whereas the Arduino line is limited to 8bit-16mhz processors.? The footprint was important, but of course something like the Arduino Nano also has a small footprint.? However, the Teensy packs so much more functionality in it's footprint, 7 serial lines, 3 SPI lines, 3 I2C lines, even 3 CANBUS lines.? The Nano has only 1 Serial, 1 SPI, and 1 I2C.? So for the same footprint, the Teensy easily dwarfs something like the Nano in terms of functionality and performance. Now, I could make the argument that this type of project really doesn't require a 32 bit - 600 mhz processor, and I could have implemented Software Serial to get the additional serial lines I needed from the Nano, but that would have minimally complicated the coding and also consumed many of those limited 16mhz cpu cycles to run the additional code. The bottom line is that using the Teensy just made everything easier to implement.? The only weakness of the Teensy, if there is one, is that you have to install Teensyduino on top of the Arduino IDE in order to use the Arduino IDE to load and program the microprocessor.? However, it really is a seamless installation and only required once.? It's not much overhead considering all the Teensy hardware offers. Jon On Monday, December 21, 2020, 05:58:41 PM EST, Philippe Robert via Personal_Submersibles wrote: Thank Jon for sharing your?work ! I have a question about the Teensy 4.0 microprocessor. What is the benefit?to use the teensy instead?of arduino Atmel based microcontroller ?? Regards Philippe -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 22 10:06:55 2020 From: personal_submersibles at psubs.org (Philippe Robert via Personal_Submersibles) Date: Tue, 22 Dec 2020 10:06:55 -0500 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1796243548.3253230.1608594672592@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> <496372579.3207998.1608587317374@mail.yahoo.com> <551960502.3158994.1608589864992@mail.yahoo.com> <1796243548.3253230.1608594672592@mail.yahoo.com> Message-ID: Ok Nice ! So the the SEMjr with the teensy can be very expendable. I didint realise the power of the teensy. Le lun. 21 d?c. 2020 6 h 52 p.m., Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> a ?crit : > Philippe, > > I chose Teensy for this project because it offered the biggest "bang for > the buck" in terms of functionality and performance. Teensy 4.0 has a > 32bit-600 mhz processor whereas the Arduino line is limited to 8bit-16mhz > processors. The footprint was important, but of course something like the > Arduino Nano also has a small footprint. However, the Teensy packs so much > more functionality in it's footprint, 7 serial lines, 3 SPI lines, 3 I2C > lines, even 3 CANBUS lines. The Nano has only 1 Serial, 1 SPI, and 1 I2C. > So for the same footprint, the Teensy easily dwarfs something like the Nano > in terms of functionality and performance. > > Now, I could make the argument that this type of project really doesn't > require a 32 bit - 600 mhz processor, and I could have implemented Software > Serial to get the additional serial lines I needed from the Nano, but that > would have minimally complicated the coding and also consumed many of those > limited 16mhz cpu cycles to run the additional code. > > The bottom line is that using the Teensy just made everything easier to > implement. The only weakness of the Teensy, if there is one, is that you > have to install Teensyduino on top of the Arduino IDE in order to use the > Arduino IDE to load and program the microprocessor. However, it really is > a seamless installation and only required once. It's not much overhead > considering all the Teensy hardware offers. > > Jon > > > > On Monday, December 21, 2020, 05:58:41 PM EST, Philippe Robert via > Personal_Submersibles wrote: > > > Thank Jon for sharing your work ! > > I have a question about the Teensy 4.0 microprocessor. What is the > benefit to use the teensy instead of arduino Atmel based microcontroller ? > > Regards > > Philippe > > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 23 02:29:16 2020 From: personal_submersibles at psubs.org (Alan via Personal_Submersibles) Date: Wed, 23 Dec 2020 20:29:16 +1300 Subject: [PSUBS-MAILIST] Life Support Alarms In-Reply-To: References: <1806472143.203674.1607881359766.ref@mail.yahoo.com> <1806472143.203674.1607881359766@mail.yahoo.com> Message-ID: <6E5892D3-22FE-480E-A2F8-4EFC666912A3@yahoo.com> Hi Alec, I'm behind in my emails here, but I would guess that most of your bow dome would be under water when you surfaced, still undergoing an external water pressure that decreases towards the surface. That would be countering the internal pressure to an extent, so maybe not so much of a worry as a hatch dome. Alan > On 14/12/2020, at 12:40 PM, Alec Smyth via Personal_Submersibles wrote: > > Hi Jon, > > Ah, the one that needs discussion in my opinion is the internal pressure. For every 1psi of internal over-pressure, my bow dome sees 566 lbs of force trying to blow it out of the sub (at the surface of course.) How much can it take before blowing out? I don't know, and it's not something I can test. The highest I've ever gone I think is 0.5psi over ambient. On the negative side, there's no problem of course and one could go to a much higher value with no problem. Internal pressure is the reason an overpressure valve is essential, but there again I'm running a little by the seat of my pants at the moment because although I have a large OP valve, I don't know its cracking pressure. Cliff, however, is coming to the rescue soon because he is planning to actually measure this. More to follow sometime soon... > > Note the color coding thresholds on my cabin pressure faceplate (attached.) They are not scientific, however, and the thresholds would in any case be dependent on construction details of each sub. > > > Best, > Alec > > > >> On Sun, Dec 13, 2020 at 12:43 PM Jon Wallace via Personal_Submersibles wrote: >> I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions. I'm not convinced temp or humidity matter all that much overall and require an agreement. I would start with the following: >> >> O2: 19.0 to 23 percent >> CO2: 0 to 5000 ppm >> Pressure: +/- 1psi >> >> Comments? >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 11:00:31 2020 From: personal_submersibles at psubs.org (Steve via Personal_Submersibles) Date: Thu, 24 Dec 2020 11:00:31 -0500 Subject: [PSUBS-MAILIST] Life Support Alarms Message-ID: <202012240648.0BO6miAN076139@whoweb.com> FYI, In my K250, while testing for leaks, I created approx. 1 psig positive internal pressure. I did not notice any issues. Of course it was only for a limited time. Steve Sent from my Verizon Motorola Smartphone On Dec 23, 2020 2:29 AM, Alan via Personal_Submersibles wrote: > > Hi Alec, > I'm behind in my emails here, but I would guess that most of your bow > dome would be under water when you surfaced, still undergoing an external > water pressure that decreases towards the surface. > That would be countering the internal pressure to an extent, so maybe not so > much of a worry as a hatch dome. > Alan > > > On 14/12/2020, at 12:40 PM, Alec Smyth via Personal_Submersibles wrote: > >> Hi Jon, >> >> Ah, the one that needs discussion in my opinion is the internal pressure. For every 1psi of internal over-pressure, my bow dome sees 566 lbs of force trying to blow it out of the sub (at the surface of course.) How much can it take before blowing out? I don't know, and it's not something I can test. The highest I've ever gone I think is 0.5psi over ambient. On the negative side, there's no problem of course and one could go to a much higher value with no problem. Internal pressure is the reason an overpressure valve is essential, but there again I'm running a little by the seat of my pants at the moment because although I have a large OP valve, I don't know its cracking pressure. Cliff, however, is coming to the rescue soon because he is planning to actually measure this. More to follow sometime soon... >> >> Note the color coding thresholds on my cabin pressure faceplate (attached.) They are not scientific, however, and the thresholds would in any case be dependent on construction details of each sub. >> >> >> Best, >> Alec >> >> >> >> On Sun, Dec 13, 2020 at 12:43 PM Jon Wallace via Personal_Submersibles wrote: >>> >>> I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions. I'm not convinced temp or humidity matter all that much overall and require an agreement. I would start with the following: >>> >>> O2: 19.0 to 23 percent >>> CO2: 0 to 5000 ppm >>> Pressure: +/- 1psi >>> >>> Comments? >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 11:11:48 2020 From: personal_submersibles at psubs.org (Steve via Personal_Submersibles) Date: Thu, 24 Dec 2020 11:11:48 -0500 Subject: [PSUBS-MAILIST] Life Support Alarms Message-ID: <202012240700.0BO700mF076262@whoweb.com> I should have mentioned why I performed this test. I too is trying to verify the cracking pressure for my automatic over pressurization valve. This was the only way I knew to test so I could select the proper spring strength. Steve Sent from my Verizon Motorola Smartphone On Dec 24, 2020 11:00 AM, Steve via Personal_Submersibles wrote: > > FYI, In my K250, while testing for leaks, I created approx. 1 psig positive internal pressure. I did not notice any issues. Of course it was only for a limited time. > > Steve > > Sent from my Verizon Motorola Smartphone > On Dec 23, 2020 2:29 AM, Alan via Personal_Submersibles wrote: >> >> Hi Alec, >> I'm behind in my emails here, but I would guess that most of your bow >> dome would be under water when you surfaced, still undergoing an external >> water pressure that decreases towards the surface. >> That would be countering the internal pressure to an extent, so maybe not so >> much of a worry as a hatch dome. >> Alan >> >> >> On 14/12/2020, at 12:40 PM, Alec Smyth via Personal_Submersibles wrote: >> >>> Hi Jon, >>> >>> Ah, the one that needs discussion in my opinion is the internal pressure. For every 1psi of internal over-pressure, my bow dome sees 566 lbs of force trying to blow it out of the sub (at the surface of course.) How much can it take before blowing out? I don't know, and it's not something I can test. The highest I've ever gone I think is 0.5psi over ambient. On the negative side, there's no problem of course and one could go to a much higher value with no problem. Internal pressure is the reason an overpressure valve is essential, but there again I'm running a little by the seat of my pants at the moment because although I have a large OP valve, I don't know its cracking pressure. Cliff, however, is coming to the rescue soon because he is planning to actually measure this. More to follow sometime soon... >>> >>> Note the color coding thresholds on my cabin pressure faceplate (attached.) They are not scientific, however, and the thresholds would in any case be dependent on construction details of each sub. >>> >>> >>> Best, >>> Alec >>> >>> >>> >>> On Sun, Dec 13, 2020 at 12:43 PM Jon Wallace via Personal_Submersibles wrote: >>>> >>>> I'm looking to start a discussion to create a PSUBS standard for max/min cabin operating conditions. I'm not convinced temp or humidity matter all that much overall and require an agreement. I would start with the following: >>>> >>>> O2: 19.0 to 23 percent >>>> CO2: 0 to 5000 ppm >>>> Pressure: +/- 1psi >>>> >>>> Comments? >>>> _______________________________________________ >>>> Personal_Submersibles mailing list >>>> Personal_Submersibles at psubs.org >>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> >>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 17:06:20 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Thu, 24 Dec 2020 22:06:20 +0000 (UTC) Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays References: <1015435713.4259303.1608847580771.ref@mail.yahoo.com> Message-ID: <1015435713.4259303.1608847580771@mail.yahoo.com> To all psubbers, Merry Christmas, Happy Holidays Jon -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 17:19:13 2020 From: personal_submersibles at psubs.org (k6fee via Personal_Submersibles) Date: Thu, 24 Dec 2020 14:19:13 -0800 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <1015435713.4259303.1608847580771@mail.yahoo.com> Message-ID: <202012241307.0BOD7Tvm082125@whoweb.com> Thanks Jon, Merry Christmas all!!! Keith T. -------- Original message --------From: Jon Wallace via Personal_Submersibles Date: 12/24/20 2:08 PM (GMT-08:00) To: Personal Submersibles General Discussion Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays To all psubbers, Merry Christmas, Happy Holidays Jon -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 17:25:48 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Thu, 24 Dec 2020 14:25:48 -0800 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays Message-ID: <20201224142548.9998CC5F@m0117567.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 17:37:51 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Thu, 24 Dec 2020 22:37:51 +0000 (UTC) Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <202012241307.0BOD7Tvm082125@whoweb.com> References: <1015435713.4259303.1608847580771@mail.yahoo.com> <202012241307.0BOD7Tvm082125@whoweb.com> Message-ID: <1380754180.4246911.1608849472082@mail.yahoo.com> Merry Christmas all.?It's lunch time Christmas day here in NZ.?Bought my great nephews some snorkelling gear to start them off in the right direction.?Photo below.?Alan On Friday, December 25, 2020, 11:20:57 AM GMT+13, k6fee via Personal_Submersibles wrote: Thanks Jon, Merry Christmas all!!! Keith T. -------- Original message --------From: Jon Wallace via Personal_Submersibles Date: 12/24/20 2:08 PM (GMT-08:00) To: Personal Submersibles General Discussion Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays To all psubbers, Merry Christmas, Happy Holidays Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: IMG_20201224_153520.jpg Type: image/jpeg Size: 3691650 bytes Desc: not available URL: From personal_submersibles at psubs.org Thu Dec 24 17:52:28 2020 From: personal_submersibles at psubs.org (Gregory Snyder via Personal_Submersibles) Date: Thu, 24 Dec 2020 16:52:28 -0600 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <20201224142548.9998CC5F@m0117567.ppops.net> References: <20201224142548.9998CC5F@m0117567.ppops.net> Message-ID: Yes! Merry Christmas! > On Dec 24, 2020, at 4:27 PM, Brian Cox via Personal_Submersibles wrote: > > ? > Merry Christmas everybody ! > > Brian > > > > --- personal_submersibles at psubs.org wrote: > > From: k6fee via Personal_Submersibles > To: Personal Submersibles General Discussion > Subject: Re: [PSUBS-MAILIST] Merry Christmas - Happy Holidays > Date: Thu, 24 Dec 2020 14:19:13 -0800 > > Thanks Jon, > > Merry Christmas all!!! > > Keith T. > > -------- Original message -------- > From: Jon Wallace via Personal_Submersibles > Date: 12/24/20 2:08 PM (GMT-08:00) > To: Personal Submersibles General Discussion > Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays > > To all psubbers, > > Merry Christmas, Happy Holidays > > Jon > > _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 20:06:38 2020 From: personal_submersibles at psubs.org (via Personal_Submersibles) Date: Fri, 25 Dec 2020 01:06:38 +0000 (UTC) Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <1015435713.4259303.1608847580771@mail.yahoo.com> References: <1015435713.4259303.1608847580771.ref@mail.yahoo.com> <1015435713.4259303.1608847580771@mail.yahoo.com> Message-ID: <1557836934.2691495.1608858398284@mail.yahoo.com> And to you, Jon.Vance -----Original Message----- From: Jon Wallace via Personal_Submersibles To: Personal Submersibles General Discussion Sent: Thu, Dec 24, 2020 5:06 pm Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays To all psubbers, Merry Christmas, Happy Holidays Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 20:43:59 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Thu, 24 Dec 2020 15:43:59 -1000 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <1557836934.2691495.1608858398284@mail.yahoo.com> References: <1015435713.4259303.1608847580771.ref@mail.yahoo.com> <1015435713.4259303.1608847580771@mail.yahoo.com> <1557836934.2691495.1608858398284@mail.yahoo.com> Message-ID: Merry Christmas everyone!!! Lava's returned, 4 miles from my house? Rick On Thu, Dec 24, 2020 at 3:07 PM via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > And to you, Jon. > Vance > > > > -----Original Message----- > From: Jon Wallace via Personal_Submersibles < > personal_submersibles at psubs.org> > To: Personal Submersibles General Discussion < > personal_submersibles at psubs.org> > Sent: Thu, Dec 24, 2020 5:06 pm > Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays > > To all psubbers, > > Merry Christmas, Happy Holidays > > Jon > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 24 21:25:05 2020 From: personal_submersibles at psubs.org (Bob Travis via Personal_Submersibles) Date: Thu, 24 Dec 2020 18:25:05 -0800 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <1015435713.4259303.1608847580771@mail.yahoo.com> References: <1015435713.4259303.1608847580771@mail.yahoo.com> Message-ID: Merry Christmas Jon! Sent from my iPhone > On Dec 24, 2020, at 2:06 PM, Jon Wallace via Personal_Submersibles wrote: > > ? > To all psubbers, > > Merry Christmas, Happy Holidays > > Jon > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 25 05:47:28 2020 From: personal_submersibles at psubs.org (Douglas Suhr via Personal_Submersibles) Date: Fri, 25 Dec 2020 05:47:28 -0500 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: References: <1015435713.4259303.1608847580771@mail.yahoo.com> Message-ID: Merry Christmas to all my fellow PSUBBERS! And here?s to hoping that 2021 is a (significantly) better year than 2020. - Douglas Suhr > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 25 06:40:15 2020 From: personal_submersibles at psubs.org (Graham Bayliss via Personal_Submersibles) Date: Fri, 25 Dec 2020 11:40:15 -0000 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <1015435713.4259303.1608847580771@mail.yahoo.com> References: <1015435713.4259303.1608847580771.ref@mail.yahoo.com> <1015435713.4259303.1608847580771@mail.yahoo.com> Message-ID: <004901d6dab2$b76016d0$26204470$@net> Hi Jon Merry christmas from the isle of man and casper 2 have a good one. Graham Bayliss From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Jon Wallace via Personal_Submersibles Sent: 24 December 2020 22:06 To: Personal Submersibles General Discussion Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays To all psubbers, Merry Christmas, Happy Holidays Jon -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Fri Dec 25 15:49:16 2020 From: personal_submersibles at psubs.org (Tim Novak via Personal_Submersibles) Date: Fri, 25 Dec 2020 12:49:16 -0800 Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays In-Reply-To: <1380754180.4246911.1608849472082@mail.yahoo.com> References: <1015435713.4259303.1608847580771@mail.yahoo.com> <202012241307.0BOD7Tvm082125@whoweb.com> <1380754180.4246911.1608849472082@mail.yahoo.com> Message-ID: <004a01d6daff$694cba00$3be62e00$@telus.net> Merry Christmas, everyone. That's a good photo, Alan. Have a terrific summer too! Tim From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles Sent: Thursday, December 24, 2020 2:38 PM To: k6fee via Personal_Submersibles Subject: Re: [PSUBS-MAILIST] Merry Christmas - Happy Holidays Merry Christmas all. It's lunch time Christmas day here in NZ. Bought my great nephews some snorkelling gear to start them off in the right direction. Photo below. Alan On Friday, December 25, 2020, 11:20:57 AM GMT+13, k6fee via Personal_Submersibles > wrote: Thanks Jon, Merry Christmas all!!! Keith T. -------- Original message -------- From: Jon Wallace via Personal_Submersibles > Date: 12/24/20 2:08 PM (GMT-08:00) To: Personal Submersibles General Discussion > Subject: [PSUBS-MAILIST] Merry Christmas - Happy Holidays To all psubbers, Merry Christmas, Happy Holidays Jon _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Sun Dec 27 19:17:51 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Sun, 27 Dec 2020 16:17:51 -0800 Subject: [PSUBS-MAILIST] Scrubber design and materials Message-ID: Hi Guys, just completed my scrubber for the VAST sub. Its capacity is right at 3lbs, based on my rice test. I see I can purchase soda sorb online but was wanting recommendations on where to purchase it or the draeger product. Since this is my first scrubber, I have no experience with the different products. David -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Image4084190095694117167.jpg Type: image/jpeg Size: 258746 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... 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URL: From personal_submersibles at psubs.org Sun Dec 27 21:24:03 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Sun, 27 Dec 2020 18:24:03 -0800 Subject: [PSUBS-MAILIST] Scrubber design and materials Message-ID: <20201227182403.999D12DA@m0117164.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 00:39:00 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Sun, 27 Dec 2020 21:39:00 -0800 Subject: [PSUBS-MAILIST] Scrubber design and materials In-Reply-To: <20201227182403.999D12DA@m0117164.ppops.net> References: <20201227182403.999D12DA@m0117164.ppops.net> Message-ID: Hi Brian, here is the data on the fan. I havent ran any tests yet to see if the watts rating are at full speed. I am adding a dimmer circuit as well. - Rated Voltage: 12V - Rated Current: 1.0A - Connecter: XH2.54-2Pin - Power: 11W - Speed: 3000RPM - Air flow:38.5CFM - Noise:45dBA David On Sun, Dec 27, 2020, 6:24 PM Brian Cox via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > David, How many watts is the scrubber motor? > > Brian > > > > --- personal_submersibles at psubs.org wrote: > > From: David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> > To: Personal Submersibles General Discussion < > personal_submersibles at psubs.org> > Subject: [PSUBS-MAILIST] Scrubber design and materials > Date: Sun, 27 Dec 2020 16:17:51 -0800 > > Hi Guys, just completed my scrubber for the VAST sub. Its capacity is > right at 3lbs, based on my rice test. I see I can purchase soda sorb online > but was wanting recommendations on where to purchase it or the draeger > product. Since this is my first scrubber, I have no experience with the > different products. > David > --0000000000001615f605b77b35d0--_______________________________________________ > Personal_Submersibles mailing list Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 01:36:15 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Sun, 27 Dec 2020 22:36:15 -0800 Subject: [PSUBS-MAILIST] Scrubber design and materials Message-ID: <20201227223615.999D1DF1@m0117164.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 01:46:33 2020 From: personal_submersibles at psubs.org (David Colombo via Personal_Submersibles) Date: Sun, 27 Dec 2020 22:46:33 -0800 Subject: [PSUBS-MAILIST] Scrubber design and materials In-Reply-To: <20201227223615.999D1DF1@m0117164.ppops.net> References: <20201227223615.999D1DF1@m0117164.ppops.net> Message-ID: Brian, even though the watts are 11w, the db rating was more of a concern since I'm in such a small space. With the cfm rate I think I won't need the higher cfm so I can get dwell time in the absorbant, and that should bring down the db. Once I get the variable control installed I will test. David On Sun, Dec 27, 2020, 10:36 PM Brian Cox via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > That seems pretty good, I just got a couple of fans that are 580ma , > 7Watts , 32.4 cfm , 55db > > Brian > > > > --- personal_submersibles at psubs.org wrote: > > From: David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> > To: Personal Submersibles General Discussion < > personal_submersibles at psubs.org> > Subject: Re: [PSUBS-MAILIST] Scrubber design and materials > Date: Sun, 27 Dec 2020 21:39:00 -0800 > > Hi Brian, here is the data on the fan. I havent ran any tests yet to see > if the watts rating are at full speed. I am adding a dimmer circuit as well. > > - Rated Voltage: 12V > - Rated Current: 1.0A > - Connecter: XH2.54-2Pin > - Power: 11W > - Speed: 3000RPM > - Air flow:38.5CFM > - Noise:45dBA > > David > > On Sun, Dec 27, 2020, 6:24 PM Brian Cox via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > David, How many watts is the scrubber motor? > > Brian > > > > --- personal_submersibles at psubs.org wrote: > > From: David Colombo via Personal_Submersibles < > personal_submersibles at psubs.org> > To: Personal Submersibles General Discussion < > personal_submersibles at psubs.org> > Subject: [PSUBS-MAILIST] Scrubber design and materials > Date: Sun, 27 Dec 2020 16:17:51 -0800 > > Hi Guys, just completed my scrubber for the VAST sub. Its capacity is > right at 3lbs, based on my rice test. I see I can purchase soda sorb online > but was wanting recommendations on where to purchase it or the draeger > product. Since this is my first scrubber, I have no experience with the > different products. > David > --0000000000001615f605b77b35d0--_______________________________________________ > Personal_Submersibles mailing list Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ Personal_Submersibles > mailing list Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 02:17:54 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Sun, 27 Dec 2020 23:17:54 -0800 Subject: [PSUBS-MAILIST] Scrubber design and materials Message-ID: <20201227231754.999D1D91@m0117164.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 02:56:33 2020 From: personal_submersibles at psubs.org (irox via Personal_Submersibles) Date: Sun, 27 Dec 2020 23:56:33 -0800 (GMT-08:00) Subject: [PSUBS-MAILIST] Scrubber design and materials Message-ID: <1544425040.2911.1609142193570@wamui-teddy.atl.sa.earthlink.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 07:04:13 2020 From: personal_submersibles at psubs.org (via Personal_Submersibles) Date: Mon, 28 Dec 2020 13:04:13 +0100 Subject: [PSUBS-MAILIST] Scrubber design and materials In-Reply-To: <1199245994.2393.1609119650674@wamui-teddy.atl.sa.earthlink.net> References: <1199245994.2393.1609119650674@wamui-teddy.atl.sa.earthlink.net> Message-ID: <078a01d6dd11$8f19bee0$ad4d3ca0$@airesearch.nl> Best use a radial fan for more pressure. Axial fans will stall. I use this one. https://nl.rs-online.com/web/p/centrifugal-fans/7125244/ BR, Emile Van: Personal_Submersibles Namens irox via Personal_Submersibles Verzonden: maandag 28 december 2020 02:41 Aan: Personal Submersibles General Discussion ; Personal Submersibles General Discussion Onderwerp: Re: [PSUBS-MAILIST] Scrubber design and materials Nice job David! I've also put together my secondary scrubber for Gamma. I ended up picking the quietest fan I could find: https://www.amazon.com/gp/product/B012CL2V3I/ It's seems to be putting out a good amount of air, but I'm not garage-dived tested it yet. I'll get rid of the USB connectors for something more marine worthy. I'm also wanting to try some IP rated fans, but seems I may have wait a few months for them to ship. I've attaching the fan with a 3D printed adapter to it's easy to swap out and test different fans. Also interested to hear folks scrubber media recommendations! Thanks, Ian. -----Original Message----- From: David Colombo via Personal_Submersibles Sent: Dec 27, 2020 4:17 PM To: Personal Submersibles General Discussion Subject: [PSUBS-MAILIST] Scrubber design and materials Hi Guys, just completed my scrubber for the VAST sub. Its capacity is right at 3lbs, based on my rice test. I see I can purchase soda sorb online but was wanting recommendations on where to purchase it or the draeger product. Since this is my first scrubber, I have no experience with the different products. David -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 10:37:33 2020 From: personal_submersibles at psubs.org (Cliff Redus via Personal_Submersibles) Date: Mon, 28 Dec 2020 15:37:33 +0000 (UTC) Subject: [PSUBS-MAILIST] Scrubber design and materials In-Reply-To: References: <20201227182403.999D12DA@m0117164.ppops.net> Message-ID: <250037893.4987060.1609169853118@mail.yahoo.com> The squire gage blower I use on the R300 scrubber is similar the one Emile has posted.??DC FLATPAKS.qxp (octopart.com) Model Papst RL90-18/14NVoltage 12-28VDCPower 5WNoise 58dBACurrent? .21AAir flow? 24CFB? at 0 in H20 differential pressure Note that the flow rate through these fans/blowers are given at 0 differential pressure.? You would need to look at the head curve on the datasheet to determine the actual flowrate through the fan/scrubber.? It would be substantially reduced due to the pressure drop through the CO2 absorbent section.? ?Also to meet ABS rules, you need to size this unit so the that the current draw is not so great as to pull the emergency battery down before reaching 72 hours of life support.? On my boat, the hotel load is about 1.5 amps (life support and comms only).? The emergency battery has a capacity of 110 Ah at 24V so a 1.5A hotel load will last 73 hours.? I did a garage test to confirm. Cliff On Sunday, December 27, 2020, 11:39:56 PM CST, David Colombo via Personal_Submersibles wrote: Hi Brian, here is the data on the fan. I havent ran any tests yet to see if the watts rating are at full speed. I am adding a dimmer circuit as well. - Rated Voltage: 12V - Rated Current: 1.0A - Connecter: XH2.54-2Pin - Power: 11W - Speed: 3000RPM - Air flow:38.5CFM - Noise:45dBA David On Sun, Dec 27, 2020, 6:24 PM Brian Cox via Personal_Submersibles wrote: David,? ? ? ? ? How many watts is the scrubber motor? Brian --- personal_submersibles at psubs.org wrote: From: David Colombo via Personal_Submersibles To: Personal Submersibles General Discussion Subject: [PSUBS-MAILIST] Scrubber design and materials Date: Sun, 27 Dec 2020 16:17:51 -0800 Hi Guys, just completed my scrubber for the VAST sub. Its capacity is right at 3lbs, based on my rice test. I see I can purchase soda sorb online but was wanting recommendations on where to purchase it or the draeger product. Since this is my first scrubber, I have no experience with the different products.?David--0000000000001615f605b77b35d0--_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 13:40:49 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Mon, 28 Dec 2020 18:40:49 +0000 (UTC) Subject: [PSUBS-MAILIST] Scrubber design and materials In-Reply-To: <250037893.4987060.1609169853118@mail.yahoo.com> References: <20201227182403.999D12DA@m0117164.ppops.net> <250037893.4987060.1609169853118@mail.yahoo.com> Message-ID: <159828777.5050710.1609180849564@mail.yahoo.com> Following this discussion with interest.?Emile I thought had an axial type scrubberthat held something like 10lb of absorbent.?This would require a lot more power to move the air through maybe 1ft of absorbent, whereas David has a radial scrubber that only needs to push air through a 2" section of absorbent. Some good thoughts on power consumption under load Cliff. I wonder if the load increases as the absorbent is spent & becomes more soggy. Ie. is there more of a load toward the end of the dive than at the beginning.?I am wanting to go with 2 smaller axial scrubbers, mainly to keep the size down. Am thinking of using an oversized axial fan to keep the noise down, and have automated speed control based on the CO2 level.?Alan On Tuesday, December 29, 2020, 04:39:29 AM GMT+13, Cliff Redus via Personal_Submersibles wrote: The squire gage blower I use on the R300 scrubber is similar the one Emile has posted.??DC FLATPAKS.qxp (octopart.com) Model Papst RL90-18/14NVoltage 12-28VDCPower 5WNoise 58dBACurrent? .21AAir flow? 24CFB? at 0 in H20 differential pressure Note that the flow rate through these fans/blowers are given at 0 differential pressure.? You would need to look at the head curve on the datasheet to determine the actual flowrate through the fan/scrubber.? It would be substantially reduced due to the pressure drop through the CO2 absorbent section.? ?Also to meet ABS rules, you need to size this unit so the that the current draw is not so great as to pull the emergency battery down before reaching 72 hours of life support.? On my boat, the hotel load is about 1.5 amps (life support and comms only).? The emergency battery has a capacity of 110 Ah at 24V so a 1.5A hotel load will last 73 hours.? I did a garage test to confirm. Cliff On Sunday, December 27, 2020, 11:39:56 PM CST, David Colombo via Personal_Submersibles wrote: Hi Brian, here is the data on the fan. I havent ran any tests yet to see if the watts rating are at full speed. I am adding a dimmer circuit as well. - Rated Voltage: 12V - Rated Current: 1.0A - Connecter: XH2.54-2Pin - Power: 11W - Speed: 3000RPM - Air flow:38.5CFM - Noise:45dBA David On Sun, Dec 27, 2020, 6:24 PM Brian Cox via Personal_Submersibles wrote: David,? ? ? ? ? How many watts is the scrubber motor? Brian --- personal_submersibles at psubs.org wrote: From: David Colombo via Personal_Submersibles To: Personal Submersibles General Discussion Subject: [PSUBS-MAILIST] Scrubber design and materials Date: Sun, 27 Dec 2020 16:17:51 -0800 Hi Guys, just completed my scrubber for the VAST sub. Its capacity is right at 3lbs, based on my rice test. I see I can purchase soda sorb online but was wanting recommendations on where to purchase it or the draeger product. Since this is my first scrubber, I have no experience with the different products.?David--0000000000001615f605b77b35d0--_______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Mon Dec 28 13:47:15 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Mon, 28 Dec 2020 18:47:15 +0000 Subject: [PSUBS-MAILIST] Scrubber design and materials In-Reply-To: <159828777.5050710.1609180849564@mail.yahoo.com> References: <20201227182403.999D12DA@m0117164.ppops.net> <250037893.4987060.1609169853118@mail.yahoo.com> <159828777.5050710.1609180849564@mail.yahoo.com> Message-ID: Note too that the granule size of your selected absorbent will affect the flow resistance. Larger particles are easier to push air through, at the expense of scrubbing capacity. Sean -------- Original Message -------- On Dec. 28, 2020, 10:40, Alan James via Personal_Submersibles wrote: > Following this discussion with interest. > Emile I thought had an axial type scrubber > that held something like 10lb of absorbent. > This would require a lot more power to move the air through maybe 1ft of absorbent, whereas David has a radial scrubber that only needs to push air through a 2" section of absorbent. Some good thoughts on power consumption under load Cliff. I wonder if the load increases as the absorbent is spent & becomes more soggy. Ie. is there more of a load toward the end of the dive than at the beginning. > I am wanting to go with 2 smaller axial scrubbers, mainly to keep the size down. Am thinking of using an oversized axial fan to keep the noise down, and have automated speed control based on the CO2 level. > Alan > > On Tuesday, December 29, 2020, 04:39:29 AM GMT+13, Cliff Redus via Personal_Submersibles wrote: > > The squire gage blower I use on the R300 scrubber is similar the one Emile has posted. [DC FLATPAKS.qxp (octopart.com)](https://datasheet.octopart.com/RL90-18-24-EBM-Papst-datasheet-68360.pdf) > > Model Papst RL90-18/14N > Voltage 12-28VDC > Power 5W > Noise 58dBA > Current .21A > Air flow 24CFB at 0 in H20 differential pressure > > Note that the flow rate through these fans/blowers are given at 0 differential pressure. You would need to look at the head curve on the datasheet to determine the actual flowrate through the fan/scrubber. It would be substantially reduced due to the pressure drop through the CO2 absorbent section. Also to meet ABS rules, you need to size this unit so the that the current draw is not so great as to pull the emergency battery down before reaching 72 hours of life support. On my boat, the hotel load is about 1.5 amps (life support and comms only). The emergency battery has a capacity of 110 Ah at 24V so a 1.5A hotel load will last 73 hours. I did a garage test to confirm. > > Cliff > > On Sunday, December 27, 2020, 11:39:56 PM CST, David Colombo via Personal_Submersibles wrote: > > Hi Brian, here is the data on the fan. I havent ran any tests yet to see if the watts rating are at full speed. I am adding a dimmer circuit as well. > > - Rated Voltage: 12V > - Rated Current: 1.0A > - Connecter: XH2.54-2Pin > - Power: 11W > - Speed: 3000RPM > - Air flow:38.5CFM > - Noise:45dBA > > David > > On Sun, Dec 27, 2020, 6:24 PM Brian Cox via Personal_Submersibles wrote: > >> David, How many watts is the scrubber motor? >> >> Brian >> >> --- personal_submersibles at psubs.org wrote: >> >> From: David Colombo via Personal_Submersibles >> To: Personal Submersibles General Discussion >> Subject: [PSUBS-MAILIST] Scrubber design and materials >> Date: Sun, 27 Dec 2020 16:17:51 -0800 >> >> Hi Guys, just completed my scrubber for the VAST sub. Its capacity is right at 3lbs, based on my rice test. I see I can purchase soda sorb online but was wanting recommendations on where to purchase it or the draeger product. Since this is my first scrubber, I have no experience with the different products. >> David --0000000000001615f605b77b35d0--_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 14:05:58 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 29 Dec 2020 09:05:58 -1000 Subject: [PSUBS-MAILIST] led Message-ID: I built my own aluminum exterior light housing, 6 each, using a cob led bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend found them online and they were about $3.50 each. I fried a number of them due to poor heat sink or driving them too much and finally got them dialed in. I asked my friend to buy some more and he said that the source in Japan does not sell them any more. I found something similar here in the U.S after hours of searching that matched pretty closely to what I had but they were about $38 each. Is anyone using something similar as far as lumens goes that has any sources I could try or is that price about the best I can do? Rick -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 15:59:02 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Tue, 29 Dec 2020 20:59:02 +0000 (UTC) Subject: [PSUBS-MAILIST] led In-Reply-To: References: Message-ID: <707696705.5453443.1609275542240@mail.yahoo.com> Rick,?I spent a lot of time on my light project, initially looking for & buying lights & housings on line, that I could adapt.?I ended up buying 70W leds & making my own housings. The housings I had marine anodized. I had to get an led driver designed & built in China, as I wanted dimming. The driver is a constant current step up, step down (buck boost) that takes a 12-60V input.?I had the lenses made up in China; 20 for about $2- each. The units were tested to 1000psi. Have used them quite a bit in caves! They get hammered in that instance because they don't have the water cooling & can get very hot.?Other people have oil filled spot lights used on off road vehicles successfully, but I wanted more of a race car look to my sub & wanted to avoid the oil.?If a housing or light came up that was suitable & easy to adapt I would use it.?But bare in mind that most online lights would need marine anodizing.?Alan? On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via Personal_Submersibles wrote: I built my own aluminum exterior light housing, 6 each, using a cob led bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend found them online and they were about $3.50 each.?I fried a number of them due to poor heat sink or driving them too much and finally got them dialed in. I asked my friend to buy some more and he said that the source in Japan does not sell them any more.??I found something similar here in the U.S after hours of searching that matched pretty closely to what I had but they were about $38 each. Is anyone using something similar?as far as lumens?goes that has any sources I could try or is that price about the best I can do? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 16:35:58 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 29 Dec 2020 11:35:58 -1000 Subject: [PSUBS-MAILIST] led In-Reply-To: <707696705.5453443.1609275542240@mail.yahoo.com> References: <707696705.5453443.1609275542240@mail.yahoo.com> Message-ID: Hi Alan Couple of questions How many lumens are your lights What is the source of the light? COB? How does marine anodizing differ from just regular anodizing and why do you think that is necessary? Is the Buck Buster/LED driver only needed to be able to dim? Why did you want to avoid oil? Rick On Tue, Dec 29, 2020 at 10:59 AM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > I spent a lot of time on my light project, initially looking for & buying > lights & housings on line, that I could adapt. > I ended up buying 70W leds & making my own housings. The housings I had > marine anodized. I had to get an led driver designed & built in China, as I > wanted dimming. The driver is a constant current step up, step down (buck > boost) that takes a 12-60V input. > I had the lenses made up in China; 20 for about $2- each. The units were > tested to 1000psi. Have used them quite a bit in caves! They get hammered > in that instance because they don't have the water cooling & can get very > hot. > Other people have oil filled spot lights used on off road vehicles > successfully, but I wanted more of a race car look to my sub & wanted to > avoid the oil. > If a housing or light came up that was suitable & easy to adapt I would > use it. > But bare in mind that most online lights would need marine anodizing. > Alan > > > On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > I built my own aluminum exterior light housing, 6 each, using a cob led > bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend > found them online and they were about $3.50 each. > I fried a number of them due to poor heat sink or driving them too much > and finally got them dialed in. I asked my friend to buy some more and he > said that the source in Japan does not sell them any more. > I found something similar here in the U.S after hours of searching that > matched pretty closely to what I had but they were about $38 each. Is > anyone using something similar as far as lumens goes that has any sources I > could try or is that price about the best I can do? > > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 19:54:15 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Wed, 30 Dec 2020 00:54:15 +0000 (UTC) Subject: [PSUBS-MAILIST] led In-Reply-To: References: <707696705.5453443.1609275542240@mail.yahoo.com> Message-ID: <391761376.5542476.1609289655395@mail.yahoo.com> Hi Rick,?I posted a couple of pictures of them on the psubs Facebook page. Not sure whether you are on there or not.?The lights are about 7000lm. Leds are usually around 100lms per Watt. They are rated a bit more but I am under driving them as they get too hot otherwise.?They are chip on board leds. A technology called "flip chip". I bought them off the manufacturer in China.?Marine anodizing is thicker, 25 microns. You can get more corrosion protection with hard anodizing. It affords extra protection against galvanic corrosion.?The buck boost drops or increases the supply voltage to the voltage required for the led. In my case I can connect the driver to anything from 12V to 60V and it increases/reduces it to the 36V required? by the led. The driver should also be CC (constant current) as the resistance of the led drops as it heats up & allows a lot more current through.?I didn't want oil as its messy, & hard to get all the air out. It can also discolour with heat. It's used successfully by lots of people. One technique with oil filling is to have a hose fitting out the back of the light with a pvc tube attached that the wires run down. The tube is pre-crimped so that it collapses easy under pressure & equalises the light fitting.?I am using glass lenses because acrylic holds the heat in.?Alan On Wednesday, December 30, 2020, 10:37:56 AM GMT+13, Rick Patton via Personal_Submersibles wrote: Hi Alan? Couple of questions How many lumens are your lightsWhat is the source?of the light? COB?How does marine anodizing differ from just regular anodizing and why do you think that is necessary?Is the Buck Buster/LED driver only needed to be able to dim?Why did you want to avoid?oil?Rick On Tue, Dec 29, 2020 at 10:59 AM Alan James via Personal_Submersibles wrote: Rick,?I spent a lot of time on my light project, initially looking for & buying lights & housings on line, that I could adapt.?I ended up buying 70W leds & making my own housings. The housings I had marine anodized. I had to get an led driver designed & built in China, as I wanted dimming. The driver is a constant current step up, step down (buck boost) that takes a 12-60V input.?I had the lenses made up in China; 20 for about $2- each. The units were tested to 1000psi. Have used them quite a bit in caves! They get hammered in that instance because they don't have the water cooling & can get very hot.?Other people have oil filled spot lights used on off road vehicles successfully, but I wanted more of a race car look to my sub & wanted to avoid the oil.?If a housing or light came up that was suitable & easy to adapt I would use it.?But bare in mind that most online lights would need marine anodizing.?Alan? On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via Personal_Submersibles wrote: I built my own aluminum exterior light housing, 6 each, using a cob led bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend found them online and they were about $3.50 each.?I fried a number of them due to poor heat sink or driving them too much and finally got them dialed in. I asked my friend to buy some more and he said that the source in Japan does not sell them any more.??I found something similar here in the U.S after hours of searching that matched pretty closely to what I had but they were about $38 each. Is anyone using something similar?as far as lumens?goes that has any sources I could try or is that price about the best I can do? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 21:07:37 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Tue, 29 Dec 2020 18:07:37 -0800 Subject: [PSUBS-MAILIST] led Message-ID: <20201229180737.25538FF6@m0117457.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 21:42:52 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Wed, 30 Dec 2020 02:42:52 +0000 (UTC) Subject: [PSUBS-MAILIST] led In-Reply-To: <20201229180737.25538FF6@m0117457.ppops.net> References: <20201229180737.25538FF6@m0117457.ppops.net> Message-ID: <1130390423.5550781.1609296172160@mail.yahoo.com> Hi Brian,?I would test them to see how hot they get before putting them in anything, just in case they are too hot to put up against the acrylic.?If you try & put 3 strips one above the other up against the acrylic they would create a very wide beam of light vertically, which you may not want & may be a waste.?Not familiar with the jel. Will it yellow if its heated? Its bound to get in front of the lenses when it comes under pressure.?You could always copy Hank; that way you have someone to blame if it fails :)?Alan On Wednesday, December 30, 2020, 03:09:25 PM GMT+13, Brian Cox via Personal_Submersibles wrote: Alan,? ? ? ? ? ? ? ? ? I'm using some of these : https://www.ledsupply.com/led-strips/waterproof-12v-led-strip led light strips - 6 ft long.? ?I actually wanted the 60 per meter strips but they were out of them so I got the 30 / meter ones.? ?My plan is to put them into a acrylic tube and I'll probably use 3 strips per tube.? I was going to put them right up against the inside of the tube.? Then fill the tube with a clear Vaseline?.? I like the vaseline because it tends not to leak as easily as just oil, and if it does leak it beads up rather than spread out like oil does.? And if I put the led's directly against the acrylic I won't lose any brightness from the opaqueness of the vaseline.?? These led's are constant voltage led's so I don't think I will need a driver, and I believe they have built in resistors that control the amperage.?? Brian ? --- personal_submersibles at psubs.org wrote: From: Alan James via Personal_Submersibles To: Rick Patton via Personal_Submersibles Subject: Re: [PSUBS-MAILIST] led Date: Wed, 30 Dec 2020 00:54:15 +0000 (UTC) Hi Rick,?I posted a couple of pictures of them on the psubs Facebook page. Not sure whether you are on there or not.?The lights are about 7000lm. Leds are usually around 100lms per Watt. They are rated a bit more but I am under driving them as they get too hot otherwise.?They are chip on board leds. A technology called "flip chip". I bought them off the manufacturer in China.?Marine anodizing is thicker, 25 microns. You can get more corrosion protection with hard anodizing. It affords extra protection against galvanic corrosion.?The buck boost drops or increases the supply voltage to the voltage required for the led. In my case I can connect the driver to anything from 12V to 60V and it increases/reduces it to the 36V required? by the led. The driver should also be CC (constant current) as the resistance of the led drops as it heats up & allows a lot more current through.?I didn't want oil as its messy, & hard to get all the air out. It can also discolour with heat. It's used successfully by lots of people. One technique with oil filling is to have a hose fitting out the back of the light with a pvc tube attached that the wires run down. The tube is pre-crimped so that it collapses easy under pressure & equalises the light fitting.?I am using glass lenses because acrylic holds the heat in.?Alan On Wednesday, December 30, 2020, 10:37:56 AM GMT+13, Rick Patton via Personal_Submersibles wrote: Hi Alan? Couple of questions How many lumens are your lightsWhat is the source?of the light? COB?How does marine anodizing differ from just regular anodizing and why do you think that is necessary?Is the Buck Buster/LED driver only needed to be able to dim?Why did you want to avoid?oil?Rick On Tue, Dec 29, 2020 at 10:59 AM Alan James via Personal_Submersibles wrote: Rick,?I spent a lot of time on my light project, initially looking for & buying lights & housings on line, that I could adapt.?I ended up buying 70W leds & making my own housings. The housings I had marine anodized. I had to get an led driver designed & built in China, as I wanted dimming. The driver is a constant current step up, step down (buck boost) that takes a 12-60V input.?I had the lenses made up in China; 20 for about $2- each. The units were tested to 1000psi. Have used them quite a bit in caves! They get hammered in that instance because they don't have the water cooling & can get very hot.?Other people have oil filled spot lights used on off road vehicles successfully, but I wanted more of a race car look to my sub & wanted to avoid the oil.?If a housing or light came up that was suitable & easy to adapt I would use it.?But bare in mind that most online lights would need marine anodizing.?Alan? On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via Personal_Submersibles wrote: I built my own aluminum exterior light housing, 6 each, using a cob led bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend found them online and they were about $3.50 each.?I fried a number of them due to poor heat sink or driving them too much and finally got them dialed in. I asked my friend to buy some more and he said that the source in Japan does not sell them any more.??I found something similar here in the U.S after hours of searching that matched pretty closely to what I had but they were about $38 each. Is anyone using something similar?as far as lumens?goes that has any sources I could try or is that price about the best I can do? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________Personal_Submersibles mailing listPersonal_Submersibles at psubs.orghttp://www.psubs.org/mailman/listinfo.cgi/personal_submersibles_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 22:04:31 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Tue, 29 Dec 2020 19:04:31 -0800 Subject: [PSUBS-MAILIST] led Message-ID: <20201229190431.99994B06@m0117567.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 22:05:12 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 29 Dec 2020 17:05:12 -1000 Subject: [PSUBS-MAILIST] led In-Reply-To: <391761376.5542476.1609289655395@mail.yahoo.com> References: <707696705.5453443.1609275542240@mail.yahoo.com> <391761376.5542476.1609289655395@mail.yahoo.com> Message-ID: Alan I don't have facebook but my wife does. not being familiar with the format, how would I look up your lights? my cobs are 1 13/16" X 1 9/16" and about 1/8" thick. What approximate size are yours and how does a flip chip differ from a regular cob? have you had any burn out from getting too hot? I am using a dielectric oil in my light housings called Marvel Mystery oil to get around the pressure differential problem but it has a slight color to it so will have to see how the light is effected by that and if it gets any worse from being heated. 10,000 lumens is a lot of light so hopefully they will still be bright enough. I am using oil compensated thrusters as well and I do have small bladders that can expand and contract with heat. I bought heat treated lenses from Mcmaster Carr but they were about $22 each and they are glass instead of acrylic. Rick On Tue, Dec 29, 2020 at 2:55 PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi Rick, > I posted a couple of pictures of them on the psubs Facebook page. Not sure > whether you are on there or not. > The lights are about 7000lm. Leds are usually around 100lms per Watt. They > are rated a bit more but I am under driving them as they get too hot > otherwise. > They are chip on board leds. A technology called "flip chip". I bought > them off the manufacturer in China. > Marine anodizing is thicker, 25 microns. You can get more corrosion > protection with hard anodizing. It affords extra protection against > galvanic corrosion. > The buck boost drops or increases the supply voltage to the voltage > required for the led. In my case I can connect the driver to anything from > 12V to 60V and it increases/reduces it to the 36V required by the led. The > driver should also be CC (constant current) as the resistance of the led > drops as it heats up & allows a lot more current through. > I didn't want oil as its messy, & hard to get all the air out. It can also > discolour with heat. It's used successfully by lots of people. One > technique with oil filling is to have a hose fitting out the back of the > light with a pvc tube attached that the wires run down. The tube is > pre-crimped so that it collapses easy under pressure & equalises the light > fitting. > I am using glass lenses because acrylic holds the heat in. > Alan > > > On Wednesday, December 30, 2020, 10:37:56 AM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > Hi Alan > > Couple of questions > > How many lumens are your lights > What is the source of the light? COB? > How does marine anodizing differ from just regular anodizing and why do > you think that is necessary? > Is the Buck Buster/LED driver only needed to be able to dim? > Why did you want to avoid oil? > Rick > > On Tue, Dec 29, 2020 at 10:59 AM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, > I spent a lot of time on my light project, initially looking for & buying > lights & housings on line, that I could adapt. > I ended up buying 70W leds & making my own housings. The housings I had > marine anodized. I had to get an led driver designed & built in China, as I > wanted dimming. The driver is a constant current step up, step down (buck > boost) that takes a 12-60V input. > I had the lenses made up in China; 20 for about $2- each. The units were > tested to 1000psi. Have used them quite a bit in caves! They get hammered > in that instance because they don't have the water cooling & can get very > hot. > Other people have oil filled spot lights used on off road vehicles > successfully, but I wanted more of a race car look to my sub & wanted to > avoid the oil. > If a housing or light came up that was suitable & easy to adapt I would > use it. > But bare in mind that most online lights would need marine anodizing. > Alan > > > On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > I built my own aluminum exterior light housing, 6 each, using a cob led > bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend > found them online and they were about $3.50 each. > I fried a number of them due to poor heat sink or driving them too much > and finally got them dialed in. I asked my friend to buy some more and he > said that the source in Japan does not sell them any more. > I found something similar here in the U.S after hours of searching that > matched pretty closely to what I had but they were about $38 each. Is > anyone using something similar as far as lumens goes that has any sources I > could try or is that price about the best I can do? > > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Tue Dec 29 23:16:11 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Tue, 29 Dec 2020 20:16:11 -0800 Subject: [PSUBS-MAILIST] led Message-ID: <20201229201611.999DB64F@m0117164.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 30 00:44:52 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Tue, 29 Dec 2020 19:44:52 -1000 Subject: [PSUBS-MAILIST] led In-Reply-To: <20201229201611.999DB64F@m0117164.ppops.net> References: <20201229201611.999DB64F@m0117164.ppops.net> Message-ID: Brian The new eruption is coming out of 3 different vents close to where the old lava lake used to be and has filled up the whole caldara floor over 500' deep so far so that's a s--- load of volume compared to a couple of years ago when it let loose. There is a webcam set up by the USGS that updates every minute that those who may be interested can watch. Rick Rickhttps:// www.nps.gov/media/webcam/view.htm?id=5B6292AF-D3C2-CF49-C128FA9697DF00B6 On Tue, Dec 29, 2020 at 6:16 PM Brian Cox via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Rick, > How's the volcano? > > Brian > > > --- personal_submersibles at psubs.org wrote: > > From: Rick Patton via Personal_Submersibles < > personal_submersibles at psubs.org> > To: Personal Submersibles General Discussion < > personal_submersibles at psubs.org> > Subject: Re: [PSUBS-MAILIST] led > Date: Tue, 29 Dec 2020 17:05:12 -1000 > > Alan > > I don't have facebook but my wife does. not being familiar with the > format, how would I look up your lights? > my cobs are 1 13/16" X 1 9/16" and about 1/8" thick. What approximate size > are yours and how does a flip chip differ from a regular cob? have you had > any burn out from getting too hot? > I am using a dielectric oil in my light housings called Marvel Mystery oil > to get around the pressure differential problem but it has a slight color > to it so will have to see how the light is effected by that and if it gets > any worse from being heated. 10,000 lumens is a lot of light so > hopefully they will still be bright enough. I am using oil compensated > thrusters as well and I do have small bladders that can expand and contract > with heat. > I bought heat treated lenses from Mcmaster Carr but they were about $22 > each and they are glass instead of acrylic. > Rick > > > On Tue, Dec 29, 2020 at 2:55 PM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Hi Rick, > I posted a couple of pictures of them on the psubs Facebook page. Not sure > whether you are on there or not. > The lights are about 7000lm. Leds are usually around 100lms per Watt. They > are rated a bit more but I am under driving them as they get too hot > otherwise. > They are chip on board leds. A technology called "flip chip". I bought > them off the manufacturer in China. > Marine anodizing is thicker, 25 microns. You can get more corrosion > protection with hard anodizing. It affords extra protection against > galvanic corrosion. > The buck boost drops or increases the supply voltage to the voltage > required for the led. In my case I can connect the driver to anything from > 12V to 60V and it increases/reduces it to the 36V required by the led. The > driver should also be CC (constant current) as the resistance of the led > drops as it heats up & allows a lot more current through. > I didn't want oil as its messy, & hard to get all the air out. It can also > discolour with heat. It's used successfully by lots of people. One > technique with oil filling is to have a hose fitting out the back of the > light with a pvc tube attached that the wires run down. The tube is > pre-crimped so that it collapses easy under pressure & equalises the light > fitting. > I am using glass lenses because acrylic holds the heat in. > Alan > > > On Wednesday, December 30, 2020, 10:37:56 AM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > Hi Alan > > Couple of questions > > How many lumens are your lights > What is the source of the light? COB? > How does marine anodizing differ from just regular anodizing and why do > you think that is necessary? > Is the Buck Buster/LED driver only needed to be able to dim? > Why did you want to avoid oil? > Rick > > On Tue, Dec 29, 2020 at 10:59 AM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, > I spent a lot of time on my light project, initially looking for & buying > lights & housings on line, that I could adapt. > I ended up buying 70W leds & making my own housings. The housings I had > marine anodized. I had to get an led driver designed & built in China, as I > wanted dimming. The driver is a constant current step up, step down (buck > boost) that takes a 12-60V input. > I had the lenses made up in China; 20 for about $2- each. The units were > tested to 1000psi. Have used them quite a bit in caves! They get hammered > in that instance because they don't have the water cooling & can get very > hot. > Other people have oil filled spot lights used on off road vehicles > successfully, but I wanted more of a race car look to my sub & wanted to > avoid the oil. > If a housing or light came up that was suitable & easy to adapt I would > use it. > But bare in mind that most online lights would need marine anodizing. > Alan > > > On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > I built my own aluminum exterior light housing, 6 each, using a cob led > bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend > found them online and they were about $3.50 each. > I fried a number of them due to poor heat sink or driving them too much > and finally got them dialed in. I asked my friend to buy some more and he > said that the source in Japan does not sell them any more. > I found something similar here in the U.S after hours of searching that > matched pretty closely to what I had but they were about $38 each. Is > anyone using something similar as far as lumens goes that has any sources I > could try or is that price about the best I can do? > > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ Personal_Submersibles > mailing list Personal_Submersibles at psubs.org > > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 30 01:01:56 2020 From: personal_submersibles at psubs.org (Alan James via Personal_Submersibles) Date: Wed, 30 Dec 2020 06:01:56 +0000 (UTC) Subject: [PSUBS-MAILIST] led In-Reply-To: References: <707696705.5453443.1609275542240@mail.yahoo.com> <391761376.5542476.1609289655395@mail.yahoo.com> Message-ID: <912381491.5562077.1609308116779@mail.yahoo.com> Hi Rick,?this link may work,? https://www.facebook.com/groups/PSUBS/permalink/1342958449381043/ Or your wife could search for Psubs on Facebook & join.? Bottom of this thread is a diagram of the difference between a flip chip and normal cob. The flip chip throws more heat out the back. Google flip chip led for some good articles.?I think I have destroyed a few flip chips mucking around with them, but haven't destroyed any mounted in my lights. They have had a thrashing as I have been using the lights in air & getting them really hot.?(if water sizzles on them they are too hot)?I wouldn't use marvel mystery oil in the housings because of the heat factor. If you accidentally left them on out of water. I would check the flash point of marvel mystery oil, would think it would be quite low.I use silicone oil.?Marvel Mystery oil make up.?It is composed primarily of petroleum distillates, including mineral?oil?(60?100%), mineral spirits (10?30%), tricresyl phosphate (an antiwear and extreme pressure additive in lubricants, 0.1?1.0%), ortho-dichlorobenzene (a softening and removing agent for carbon-based contamination on metal surfaces, 0.1?1.0%), and ... It is a class 3 flammible liquid.?Your 10,000 lumen lights will be fine in water but probably heat up really fast out of it.?I have experimented with them in the kitchen sink and mine hardly warm up in water but are untouchable after a couple of minutes out of water.?The Mc Master Carr lens sounds good.?Mine were heat and pressure resistant borosilicate lenses.?Alan On Wednesday, December 30, 2020, 04:06:51 PM GMT+13, Rick Patton via Personal_Submersibles wrote: Alan I don't have facebook?but my wife does. not being familiar with the format, how would I look up your lights?my cobs are 1 13/16" X 1 9/16" and about 1/8" thick. What approximate size are yours and how does a flip chip differ from a regular cob? have you had any burn out from getting too hot?I am using a dielectric oil in my light housings called Marvel Mystery oil to get around the pressure differential?problem but it has a slight color to it so will have to see how the light is effected by that and if it gets any worse from being heated. 10,000 lumens?is a lot of light so hopefully?they will still be bright enough. I am using oil compensated thrusters as well and I do have small bladders that can expand and contract with heat.I bought heat treated lenses from Mcmaster Carr but they were about $22 each and they are glass instead of acrylic.?Rick On Tue, Dec 29, 2020 at 2:55 PM Alan James via Personal_Submersibles wrote: Hi Rick,?I posted a couple of pictures of them on the psubs Facebook page. Not sure whether you are on there or not.?The lights are about 7000lm. Leds are usually around 100lms per Watt. They are rated a bit more but I am under driving them as they get too hot otherwise.?They are chip on board leds. A technology called "flip chip". I bought them off the manufacturer in China.?Marine anodizing is thicker, 25 microns. You can get more corrosion protection with hard anodizing. It affords extra protection against galvanic corrosion.?The buck boost drops or increases the supply voltage to the voltage required for the led. In my case I can connect the driver to anything from 12V to 60V and it increases/reduces it to the 36V required? by the led. The driver should also be CC (constant current) as the resistance of the led drops as it heats up & allows a lot more current through.?I didn't want oil as its messy, & hard to get all the air out. It can also discolour with heat. It's used successfully by lots of people. One technique with oil filling is to have a hose fitting out the back of the light with a pvc tube attached that the wires run down. The tube is pre-crimped so that it collapses easy under pressure & equalises the light fitting.?I am using glass lenses because acrylic holds the heat in.?Alan On Wednesday, December 30, 2020, 10:37:56 AM GMT+13, Rick Patton via Personal_Submersibles wrote: Hi Alan? Couple of questions How many lumens are your lightsWhat is the source?of the light? COB?How does marine anodizing differ from just regular anodizing and why do you think that is necessary?Is the Buck Buster/LED driver only needed to be able to dim?Why did you want to avoid?oil?Rick On Tue, Dec 29, 2020 at 10:59 AM Alan James via Personal_Submersibles wrote: Rick,?I spent a lot of time on my light project, initially looking for & buying lights & housings on line, that I could adapt.?I ended up buying 70W leds & making my own housings. The housings I had marine anodized. I had to get an led driver designed & built in China, as I wanted dimming. The driver is a constant current step up, step down (buck boost) that takes a 12-60V input.?I had the lenses made up in China; 20 for about $2- each. The units were tested to 1000psi. Have used them quite a bit in caves! They get hammered in that instance because they don't have the water cooling & can get very hot.?Other people have oil filled spot lights used on off road vehicles successfully, but I wanted more of a race car look to my sub & wanted to avoid the oil.?If a housing or light came up that was suitable & easy to adapt I would use it.?But bare in mind that most online lights would need marine anodizing.?Alan? On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via Personal_Submersibles wrote: I built my own aluminum exterior light housing, 6 each, using a cob led bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend found them online and they were about $3.50 each.?I fried a number of them due to poor heat sink or driving them too much and finally got them dialed in. I asked my friend to buy some more and he said that the source in Japan does not sell them any more.??I found something similar here in the U.S after hours of searching that matched pretty closely to what I had but they were about $38 each. Is anyone using something similar?as far as lumens?goes that has any sources I could try or is that price about the best I can do? Rick_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Screenshot_20201230_182941.jpg Type: image/jpeg Size: 124207 bytes Desc: not available URL: From personal_submersibles at psubs.org Wed Dec 30 11:04:22 2020 From: personal_submersibles at psubs.org (Philippe Robert via Personal_Submersibles) Date: Wed, 30 Dec 2020 11:04:22 -0500 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> <496372579.3207998.1608587317374@mail.yahoo.com> <551960502.3158994.1608589864992@mail.yahoo.com> <1796243548.3253230.1608594672592@mail.yahoo.com> Message-ID: Hi all, I just received the PCB this morning. Very good quality PCB for the price. [image: PCB.jpg] Le mar. 22 d?c. 2020 ? 10:06, Philippe Robert a ?crit : > Ok Nice ! So the the SEMjr with the teensy can be very expendable. I > didint realise the power of the teensy. > > Le lun. 21 d?c. 2020 6 h 52 p.m., Jon Wallace via Personal_Submersibles < > personal_submersibles at psubs.org> a ?crit : > >> Philippe, >> >> I chose Teensy for this project because it offered the biggest "bang for >> the buck" in terms of functionality and performance. Teensy 4.0 has a >> 32bit-600 mhz processor whereas the Arduino line is limited to 8bit-16mhz >> processors. The footprint was important, but of course something like the >> Arduino Nano also has a small footprint. However, the Teensy packs so much >> more functionality in it's footprint, 7 serial lines, 3 SPI lines, 3 I2C >> lines, even 3 CANBUS lines. The Nano has only 1 Serial, 1 SPI, and 1 I2C. >> So for the same footprint, the Teensy easily dwarfs something like the Nano >> in terms of functionality and performance. >> >> Now, I could make the argument that this type of project really doesn't >> require a 32 bit - 600 mhz processor, and I could have implemented Software >> Serial to get the additional serial lines I needed from the Nano, but that >> would have minimally complicated the coding and also consumed many of those >> limited 16mhz cpu cycles to run the additional code. >> >> The bottom line is that using the Teensy just made everything easier to >> implement. The only weakness of the Teensy, if there is one, is that you >> have to install Teensyduino on top of the Arduino IDE in order to use the >> Arduino IDE to load and program the microprocessor. However, it really is >> a seamless installation and only required once. It's not much overhead >> considering all the Teensy hardware offers. >> >> Jon >> >> >> >> On Monday, December 21, 2020, 05:58:41 PM EST, Philippe Robert via >> Personal_Submersibles wrote: >> >> >> Thank Jon for sharing your work ! >> >> I have a question about the Teensy 4.0 microprocessor. What is the >> benefit to use the teensy instead of arduino Atmel based microcontroller ? >> >> Regards >> >> Philippe >> >> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: PCB.jpg Type: image/jpeg Size: 2952481 bytes Desc: not available URL: From personal_submersibles at psubs.org Wed Dec 30 12:04:37 2020 From: personal_submersibles at psubs.org (Jon Wallace via Personal_Submersibles) Date: Wed, 30 Dec 2020 17:04:37 +0000 (UTC) Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> <496372579.3207998.1608587317374@mail.yahoo.com> <551960502.3158994.1608589864992@mail.yahoo.com> <1796243548.3253230.1608594672592@mail.yahoo.com> Message-ID: <1750350073.5716217.1609347877886@mail.yahoo.com> Hi Philippe, where did you order them?? I got mine at JLCPCB. Jon On Wednesday, December 30, 2020, 11:10:04 AM EST, Philippe Robert via Personal_Submersibles wrote: Hi all, I just received the PCB this morning. Very good quality PCB for the price.? Le?mar. 22 d?c. 2020 ??10:06, Philippe Robert a ?crit?: Ok Nice ! So the the SEMjr with the teensy can be very expendable. I didint realise the power of the teensy.? Le lun. 21 d?c. 2020 6 h 52 p.m., Jon Wallace via Personal_Submersibles a ?crit?: Philippe, I chose Teensy for this project because it offered the biggest "bang for the buck" in terms of functionality and performance.? Teensy 4.0 has a 32bit-600 mhz processor whereas the Arduino line is limited to 8bit-16mhz processors.? The footprint was important, but of course something like the Arduino Nano also has a small footprint.? However, the Teensy packs so much more functionality in it's footprint, 7 serial lines, 3 SPI lines, 3 I2C lines, even 3 CANBUS lines.? The Nano has only 1 Serial, 1 SPI, and 1 I2C.? So for the same footprint, the Teensy easily dwarfs something like the Nano in terms of functionality and performance. Now, I could make the argument that this type of project really doesn't require a 32 bit - 600 mhz processor, and I could have implemented Software Serial to get the additional serial lines I needed from the Nano, but that would have minimally complicated the coding and also consumed many of those limited 16mhz cpu cycles to run the additional code. The bottom line is that using the Teensy just made everything easier to implement.? The only weakness of the Teensy, if there is one, is that you have to install Teensyduino on top of the Arduino IDE in order to use the Arduino IDE to load and program the microprocessor.? However, it really is a seamless installation and only required once.? It's not much overhead considering all the Teensy hardware offers. Jon On Monday, December 21, 2020, 05:58:41 PM EST, Philippe Robert via Personal_Submersibles wrote: Thank Jon for sharing your?work ! I have a question about the Teensy 4.0 microprocessor. What is the benefit?to use the teensy instead?of arduino Atmel based microcontroller ?? Regards Philippe _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles _______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: PCB.jpg Type: image/jpeg Size: 2952481 bytes Desc: not available URL: From personal_submersibles at psubs.org Wed Dec 30 12:50:39 2020 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Wed, 30 Dec 2020 07:50:39 -1000 Subject: [PSUBS-MAILIST] led In-Reply-To: <912381491.5562077.1609308116779@mail.yahoo.com> References: <707696705.5453443.1609275542240@mail.yahoo.com> <391761376.5542476.1609289655395@mail.yahoo.com> <912381491.5562077.1609308116779@mail.yahoo.com> Message-ID: Hi Alan I have a buck buster to lower the volts from 36 to 34 volt per it's requirement but don't plan on being able to dim them. I also have the toggle switches that illuminate when on so it will be easier to see what's on and what's off so hopefully they would never be on when sub is out of the water. I clicked the "join tab" but nothing happened as far as wanting me to come up with a password or anything so hopefully it worked. Rick On Tue, Dec 29, 2020 at 8:02 PM Alan James via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi Rick, > this link may work, > > https://www.facebook.com/groups/PSUBS/permalink/1342958449381043/ > Or your wife could search for Psubs on Facebook & join. > > Bottom of this thread is a diagram of the difference between a flip chip > and normal cob. The flip chip throws more heat out the back. Google flip > chip led for some good articles. > I think I have destroyed a few flip chips mucking around with them, but > haven't destroyed any mounted in my lights. They have had a thrashing as I > have been using the lights in air & getting them really hot. > (if water sizzles on them they are too hot) > I wouldn't use marvel mystery oil in the housings because of the heat > factor. If you accidentally left them on out of water. I would check the > flash point of marvel mystery oil, would think it would be quite low. > I use silicone oil. > Marvel Mystery oil make up. > It is composed primarily of petroleum distillates, including mineral *oil* (60?100%), > mineral spirits (10?30%), tricresyl phosphate (an antiwear and extreme > pressure additive in lubricants, 0.1?1.0%), ortho-dichlorobenzene (a > softening and removing agent for carbon-based contamination on metal > surfaces, 0.1?1.0%), and ... > It is a class 3 flammible liquid. > Your 10,000 lumen lights will be fine in water but probably heat up really > fast out of it. > I have experimented with them in the kitchen sink and mine hardly warm up > in water but are untouchable after a couple of minutes out of water. > The Mc Master Carr lens sounds good. > Mine were heat and pressure resistant borosilicate lenses. > Alan > > > On Wednesday, December 30, 2020, 04:06:51 PM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > Alan > > I don't have facebook but my wife does. not being familiar with the > format, how would I look up your lights? > my cobs are 1 13/16" X 1 9/16" and about 1/8" thick. What approximate size > are yours and how does a flip chip differ from a regular cob? have you had > any burn out from getting too hot? > I am using a dielectric oil in my light housings called Marvel Mystery oil > to get around the pressure differential problem but it has a slight color > to it so will have to see how the light is effected by that and if it gets > any worse from being heated. 10,000 lumens is a lot of light so > hopefully they will still be bright enough. I am using oil compensated > thrusters as well and I do have small bladders that can expand and contract > with heat. > I bought heat treated lenses from Mcmaster Carr but they were about $22 > each and they are glass instead of acrylic. > Rick > > > On Tue, Dec 29, 2020 at 2:55 PM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Hi Rick, > I posted a couple of pictures of them on the psubs Facebook page. Not sure > whether you are on there or not. > The lights are about 7000lm. Leds are usually around 100lms per Watt. They > are rated a bit more but I am under driving them as they get too hot > otherwise. > They are chip on board leds. A technology called "flip chip". I bought > them off the manufacturer in China. > Marine anodizing is thicker, 25 microns. You can get more corrosion > protection with hard anodizing. It affords extra protection against > galvanic corrosion. > The buck boost drops or increases the supply voltage to the voltage > required for the led. In my case I can connect the driver to anything from > 12V to 60V and it increases/reduces it to the 36V required by the led. The > driver should also be CC (constant current) as the resistance of the led > drops as it heats up & allows a lot more current through. > I didn't want oil as its messy, & hard to get all the air out. It can also > discolour with heat. It's used successfully by lots of people. One > technique with oil filling is to have a hose fitting out the back of the > light with a pvc tube attached that the wires run down. The tube is > pre-crimped so that it collapses easy under pressure & equalises the light > fitting. > I am using glass lenses because acrylic holds the heat in. > Alan > > > On Wednesday, December 30, 2020, 10:37:56 AM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > Hi Alan > > Couple of questions > > How many lumens are your lights > What is the source of the light? COB? > How does marine anodizing differ from just regular anodizing and why do > you think that is necessary? > Is the Buck Buster/LED driver only needed to be able to dim? > Why did you want to avoid oil? > Rick > > On Tue, Dec 29, 2020 at 10:59 AM Alan James via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > Rick, > I spent a lot of time on my light project, initially looking for & buying > lights & housings on line, that I could adapt. > I ended up buying 70W leds & making my own housings. The housings I had > marine anodized. I had to get an led driver designed & built in China, as I > wanted dimming. The driver is a constant current step up, step down (buck > boost) that takes a 12-60V input. > I had the lenses made up in China; 20 for about $2- each. The units were > tested to 1000psi. Have used them quite a bit in caves! They get hammered > in that instance because they don't have the water cooling & can get very > hot. > Other people have oil filled spot lights used on off road vehicles > successfully, but I wanted more of a race car look to my sub & wanted to > avoid the oil. > If a housing or light came up that was suitable & easy to adapt I would > use it. > But bare in mind that most online lights would need marine anodizing. > Alan > > > On Wednesday, December 30, 2020, 08:08:07 AM GMT+13, Rick Patton via > Personal_Submersibles wrote: > > > I built my own aluminum exterior light housing, 6 each, using a cob led > bulb that was 10,000 lumens, DC 34 volt and about 100 watts. My friend > found them online and they were about $3.50 each. > I fried a number of them due to poor heat sink or driving them too much > and finally got them dialed in. I asked my friend to buy some more and he > said that the source in Japan does not sell them any more. > I found something similar here in the U.S after hours of searching that > matched pretty closely to what I had but they were about $38 each. Is > anyone using something similar as far as lumens goes that has any sources I > could try or is that price about the best I can do? > > Rick > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Dec 30 15:08:43 2020 From: personal_submersibles at psubs.org (Philippe Robert via Personal_Submersibles) Date: Wed, 30 Dec 2020 15:08:43 -0500 Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project In-Reply-To: <1750350073.5716217.1609347877886@mail.yahoo.com> References: <2075604332.2174200.1606505614916@mail.yahoo.com> <1706716848.4411960.1607095882395@mail.yahoo.com> <621398633.4495108.1607106794007@mail.yahoo.com> <1946574409.4525064.1607109608291@mail.yahoo.com> <1832385415.4656162.1607133789968@mail.yahoo.com> <496372579.3207998.1608587317374@mail.yahoo.com> <551960502.3158994.1608589864992@mail.yahoo.com> <1796243548.3253230.1608594672592@mail.yahoo.com> <1750350073.5716217.1609347877886@mail.yahoo.com> Message-ID: Hi, JLCPCB too ! Le mer. 30 d?c. 2020 ? 12:06, Jon Wallace via Personal_Submersibles < personal_submersibles at psubs.org> a ?crit : > Hi Philippe, where did you order them? I got mine at JLCPCB. > > Jon > > > > On Wednesday, December 30, 2020, 11:10:04 AM EST, Philippe Robert via > Personal_Submersibles wrote: > > > Hi all, > > I just received the PCB this morning. Very good quality PCB for the price. > > [image: PCB.jpg] > > Le mar. 22 d?c. 2020 ? 10:06, Philippe Robert a ?crit : > > Ok Nice ! So the the SEMjr with the teensy can be very expendable. I > didint realise the power of the teensy. > > Le lun. 21 d?c. 2020 6 h 52 p.m., Jon Wallace via Personal_Submersibles < > personal_submersibles at psubs.org> a ?crit : > > Philippe, > > I chose Teensy for this project because it offered the biggest "bang for > the buck" in terms of functionality and performance. Teensy 4.0 has a > 32bit-600 mhz processor whereas the Arduino line is limited to 8bit-16mhz > processors. The footprint was important, but of course something like the > Arduino Nano also has a small footprint. However, the Teensy packs so much > more functionality in it's footprint, 7 serial lines, 3 SPI lines, 3 I2C > lines, even 3 CANBUS lines. The Nano has only 1 Serial, 1 SPI, and 1 I2C. > So for the same footprint, the Teensy easily dwarfs something like the Nano > in terms of functionality and performance. > > Now, I could make the argument that this type of project really doesn't > require a 32 bit - 600 mhz processor, and I could have implemented Software > Serial to get the additional serial lines I needed from the Nano, but that > would have minimally complicated the coding and also consumed many of those > limited 16mhz cpu cycles to run the additional code. > > The bottom line is that using the Teensy just made everything easier to > implement. The only weakness of the Teensy, if there is one, is that you > have to install Teensyduino on top of the Arduino IDE in order to use the > Arduino IDE to load and program the microprocessor. However, it really is > a seamless installation and only required once. It's not much overhead > considering all the Teensy hardware offers. > > Jon > > > > On Monday, December 21, 2020, 05:58:41 PM EST, Philippe Robert via > Personal_Submersibles wrote: > > > Thank Jon for sharing your work ! > > I have a question about the Teensy 4.0 microprocessor. What is the > benefit to use the teensy instead of arduino Atmel based microcontroller ? > > Regards > > Philippe > > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: PCB.jpg Type: image/jpeg Size: 2952481 bytes Desc: not available URL: From personal_submersibles at psubs.org Thu Dec 31 20:40:10 2020 From: personal_submersibles at psubs.org (Brian Cox via Personal_Submersibles) Date: Thu, 31 Dec 2020 17:40:10 -0800 Subject: [PSUBS-MAILIST] Aluminum thru hulls Message-ID: <20201231174010.999D8886@m0117164.ppops.net> An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 31 20:49:45 2020 From: personal_submersibles at psubs.org (k6fee via Personal_Submersibles) Date: Thu, 31 Dec 2020 17:49:45 -0800 Subject: [PSUBS-MAILIST] Aluminum thru hulls In-Reply-To: <20201231174010.999D8886@m0117164.ppops.net> Message-ID: <202012311526.0BVFQN6a046274@whoweb.com> Be sure to use marine grade aluminum or it will dissolve like a zinc anode. Marine aluminium doesn't corrode in salt water. Keith T -------- Original message --------From: Brian Cox via Personal_Submersibles Date: 12/31/20 5:42 PM (GMT-08:00) To: PSubs Subject: [PSUBS-MAILIST] Aluminum thru hulls Hi All,? Happy New Year !? ? ? ? ? ? ? Can anyone tell me why I can't make all of my different thru hulls out of aluminum ?? ?Fittings that will be potted and so forth for electrical . Thanks, Brian -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Dec 31 20:51:51 2020 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Fri, 01 Jan 2021 01:51:51 +0000 Subject: [PSUBS-MAILIST] Aluminum thru hulls In-Reply-To: <20201231174010.999D8886@m0117164.ppops.net> References: <20201231174010.999D8886@m0117164.ppops.net> Message-ID: Dissimilar metal corrosion. Aluminum will form a galvanic cell with carbon steel. The only way to prevent this is to protect them with sacrificial metal anodes made of zinc or magnesium. Sean -------- Original Message -------- On Dec. 31, 2020, 17:40, Brian Cox via Personal_Submersibles wrote: > Hi All, Happy New Year ! Can anyone tell me why I can't make all of my different thru hulls out of aluminum ? Fittings that will be potted and so forth for electrical . > > Thanks, > > Brian -------------- next part -------------- An HTML attachment was scrubbed... URL: