[PSUBS-MAILIST] SEMjr - DIY Electronic Project

Fri Nov 27 13:28:29 EST 2020

Jon,
That set-up looks ideal. Do you have a grocery-list of tasks that still
need to be completed? I've been amassing a collection of oxygen analyzers
and so far haven't found a unit that has been completely to my satisfaction.

Also, there appears to be a COVID related shortage of oxygen sensors
happening right now.

Thanks,

-River J. Dolfi

412-997-2526
rdolfi7 at gmail.com

On Fri, Nov 27, 2020 at 1:11 PM via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

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>    1. Re: OTS comms headset. (Alan via Personal_Submersibles)
>    2. SEMjr - DIY Electronic Project
>       (Jon Wallace via Personal_Submersibles)
>    3. Re: SEMjr - DIY Electronic Project
>       (David Colombo via Personal_Submersibles)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 21 Nov 2020 23:02:49 +1300
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
>         <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] OTS comms headset.
> Message-ID: <8ED01650-1290-4878-85B5-F2AB7719ADC6 at yahoo.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Jon,
> Just clarifying my thinking....
> The more potting compound you put around the transducer the more it's going
> to impede the signal, so the logical approach would be to put less around
> the
> Topside transducer that is not going deep & more around the diver unit.
> Alan
>
> > On 21/11/2020, at 10:23 PM, Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >
> > Alan, if you are asking for an OTS rating, it's rated for the depth of
> it's intended purpose.  See link to document, below.  For the STX-101,
> that's 35 feet because the standard cable length is 35 feet long.  For the
> SSB-2010 it's 300 feet because that's about the limit for deep technical
> diving.  You can see from the chart that the transducer with 55 foot cable
> is rated for 55 feet, and the one with 100 foot cable is rated for 100
> feet.  These ratings make sense from a marketing perspective but I have no
> concern that these are even close to actual failure depths.  For example,
> Cliff gave the R-300 a 400 foot unmanned depth test in Lake Tahoe with his
> OTS transducer attached.  Surface unit performance is going to be
> negatively affected by signal loss and potential electromagnetic
> reflections in the cable just like any transceiver/antenna system which is
> why you won't see a 1000 or 2000 foot cable option.  The transducer units
> appear to be solidly potted and I suspect their!
>   failure depth is "deep".  Certainly, I think there's no issue with it
> installed on any K-boat.
> >
> >
> https://www.oceantechnologysystems.com/wp-content/uploads/2019/08/OTS-Catalog52019-small.pdf
> >
> > Jon
> >
> >
> > On Friday, November 20, 2020, 11:17:35 PM EST, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> >
> >
> > Thanks Jon,
> > do you know the depth rating for the XTS-101transducer. If its designed
> as a top side module I am wondering whether the transducer is not as robust
> as the divers transducer. I have seen that you can purchase a 100ft
> extension cable for it, so it can at least go that depth.
> > Alan
> >
> > On Saturday, November 21, 2020, 03:37:51 PM GMT+13, Jon Wallace via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> >
> >
> > Alan, don't know, but I will certainly look into it.  Sounds like it
> could be as simple as a junction box that accepts VHF and UWC inputs, and a
> toggle switch to select the appropriate radio.  Nyutco modified his headset
> to use two boom mics, one for VHF the other for UWC.  I don't remember how
> we switched between the two transceivers though.  Maybe someone else does.
> >
> > The STX-101 will be easy to modify for off-the-shelf headsets.  It uses
> a separate banana-clip jack for headset and microphone so there should be
> no cutting of wires necessary.  The SSB-2010 is going to be more of a
> hassle because it will require cutting and splicing their stock wire
> adapter.
> >
> > Jon
> >
> >
> > On Friday, November 20, 2020, 01:07:14 PM EST, Alan James via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> >
> >
> > Some great thoughts here.
> > Jon, are you going to incorporate topside
> > Communication through the headset in your design? Looking forward to
> seeing what you come up with!
> > I like the idea of the push button on the controls.
> > Alan
> >
> >
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> Message: 2
> Date: Fri, 27 Nov 2020 17:49:56 +0000 (UTC)
> From: Jon Wallace via Personal_Submersibles
>         <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
>         <personal_submersibles at psubs.org>
> Subject: [PSUBS-MAILIST] SEMjr - DIY Electronic Project
> Message-ID: <1234133898.2132017.1606499396296 at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> I have created a new page at?
> http://www.psubs.org/community/projects/SEM1/??describing a DIY project
> called SEMJR for building an electronic Submarine Environment Monitor which
> includes O2, CO2, Barometer, Temperature, and Humidity which should be
> valuable for anyone looking to supplement or upgrade from analog to digital
> devices.
> A Bill Of Materials for all elements of the project is also available on
> the web site.? Additionally, written instructions will be provided and an
> instructional video produced in the near future.
> I've designed this project to be as simple as I possibly can given the
> sensor components and intended functionality.? While it is intended to be a
> "connect Part-A to Part-B" type of project, it will involve lots of
> soldering as well as some wiring of electronic parts.? Additionally, you
> will need to download and install various software tools on your local
> computer to load the microprocessor with the actual application program
> that interfaces with the sensors.? I suspect some community members may be
> more adapt at this than others and encourage builders to find others in our
> community who can load the software on the microprocessor for them if you
> have have any technical hesitancy in this area.??
> If you incorporate all four sensors (you can include only the ones you
> need) this DIY project will cost you approximately $370 USD.? The largest
> part of that cost is the O2 and CO2 sensors which cost around $100 each.
> Please read the project description file on the website for more detailed
> information.? I expect to release the SEMJR application software before the
> end of December 2020.? It is developed using the Arduino IDE and will be
> released under GNU GPL 3.0 licensing.
> Jon
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> Message: 3
> Date: Fri, 27 Nov 2020 10:10:05 -0800
> 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] SEMjr - DIY Electronic Project
> Message-ID:
>         <CAHHFyEE1vYrnm8QOtZ16=
> j_PHnLBn1SgV+JiQLi80m3rxdLvcw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Jon, great job! This will be a great resource. This will be my next project
> for my VAST sub over the winter.
> David
>
> On Fri, Nov 27, 2020, 9:51 AM Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> > I have created a new page at
> http://www.psubs.org/community/projects/SEM1/  describing
> > a DIY project called SEMJR for building an electronic Submarine
> Environment
> > Monitor which includes O2, CO2, Barometer, Temperature, and Humidity
> which
> > should be valuable for anyone looking to supplement or upgrade from
> analog
> > to digital devices.
> >
> > A Bill Of Materials for all elements of the project is also available on
> > the web site.  Additionally, written instructions will be provided and an
> > instructional video produced in the near future.
> >
> > I've designed this project to be as simple as I possibly can given the
> > sensor components and intended functionality.  While it is intended to
> be a
> > "connect Part-A to Part-B" type of project, it will involve lots of
> > soldering as well as some wiring of electronic parts.  Additionally, you
> > will need to download and install various software tools on your local
> > computer to load the microprocessor with the actual application program
> > that interfaces with the sensors.  I suspect some community members may
> be
> > more adapt at this than others and encourage builders to find others in
> our
> > community who can load the software on the microprocessor for them if you
> > have have any technical hesitancy in this area.
> >
> > If you incorporate all four sensors (you can include only the ones you
> > need) this DIY project will cost you approximately $370 USD.  The largest
> > part of that cost is the O2 and CO2 sensors which cost around $100 each.
> >
> > Please read the project description file on the website for more detailed
> > information.  I expect to release the SEMJR application software before
> the
> > end of December 2020.  It is developed using the Arduino IDE and will be
> > released under GNU GPL 3.0 licensing.
> >
> > Jon
> > _______________________________________________
> > Personal_Submersibles mailing list
> > Personal_Submersibles at psubs.org
> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
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