<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Hank,</div><div>part of the idea behind this is that being a 1 person sub I want to make</div><div>it super simple for anybody else to dive. I will make the ballast switch a momentary</div><div>switch so pilots can't leave it on by mistake & burn out my solenoid valves.</div><div>As for the reliability of the electronics; I was thinking of using 3 tilt switches</div><div>& having the program only take note of the 2 switches with the closest values</div><div>to each other, & also alerting the user if the third unit is out of a certain range</div><div>compared to the other 2. I will do similar with the O2 & CO2 systems.</div><div>I could additionally have switches wired direct to the solenoid valves over-riding</div><div>the arduino unit.</div><div>As per GL philosophy, no single component failure should be able to result</div><div>in a life threatening event.</div><div>Alan</div><div><br></div><div><br></div><div><br></div><div><br>On 30/10/2018, at 12:21 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div class="ydpfad147deyahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Alan,</div><div>I have to admit, that is pretty tempting. I am torn between having a nice feature and my HATRED for electronics in a sub. At Lake Tahoe, the only issues with Gamma were ELECTRONIC, yes even Gamma with minimal electronics had a failed potentiometer on the speed control. Luckily, because I HATE and distrust all things electronic I carry a spare everything. Are you not afraid if you make the sub so easy to operate that you take the joy out of diving it. </div><div>Hank</div><div><br></div>
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On Sunday, October 28, 2018, 10:38:27 PM MDT, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="yiv4729897271"><div><div></div><div>Hank,</div><div>you'll really get excited over this! I have purchased a $10- arduino</div><div>compatible tilt sensor / accelerometer to control my ballast solenoids.</div><div>The idea is that to dive you flick one switch on the consul, this connects</div><div>to the arduino board & via relays opens the ballast solenoid valves.</div><div>If the sub starts to descend unevenly the arduino will read this from the </div><div>tilt sensor & turn off the appropriate ballast valve untill the subs descent</div><div>becomes level. </div><div>Probably a bit of fine tuning in the field required.</div><div>In the photo below I am only showing one relay as an example but will </div><div>need to source relays based on my currently unknown power requirements.</div><div>That is basically it, apart from the wiring.</div><div>Cheers Alan</div><div><image1.JPG><br clear="none"></div><div><br clear="none">On 29/10/2018, at 10:42 AM, Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div></div></blockquote></div><div><div></div><div>Hank,</div><div>I would be interested in seeing them when they are finished.</div><div>Attached is one of my preliminary designs, but will probably</div><div>make the Aluminium housing a tight fit around the wires as </div><div>a heat sink. Being vent valves they won't get water cooled till </div><div>the ballast tanks are flooded.</div><div>Alan</div><div> <image1.JPG></div><div class="yiv4729897271yqt1653052636" id="yiv4729897271yqtfd13846"><div><br clear="none">On 29/10/2018, at 10:14 AM, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div class="yiv4729897271ydpb7ac9ba9yahoo-style-wrap" style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Alan,</div><div>I am making solenoid vent valves and immersing the entire valve in oil with a compensation bladder. I used them on my salvage ROV that did thousands of cycles without anything done to them. I need two on Gamma and two on E3000</div><div>Hank</div><div><br clear="none"></div>
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On Sunday, October 28, 2018, 1:57:10 PM MDT, Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="yiv4729897271"><div><div></div><div>Hank,</div><div>I would need to put a seal on the plunger & as the plunger goes</div><div>in & out it would be displacing oil, so have the same problems as with</div><div>linear actuators. As the plunger has to be a material that can be</div><div>magnetised it is vulnerable to corrosion, so I will have to coat it in</div><div>resin anyway. It is just a matter of putting the plunger on the lathe</div><div>& taking off enough metal to make room for the resin. </div><div>I made a solenoid valve years ago. It was 60W & got hot really fast.</div><div>I have ordered a 48V & 24V solenoid mainly to see how hot they</div><div>get, how strong they are, what gauge wire they are using & how many</div><div>turns. If neither is suitable at least I will get some ideas for building one.</div><div>I have been inspired by those little open waterproofed motors I bought.</div><div>What were you going to use the solenoids for? If you want I will keep</div><div>you up to date with what I am doing, but the solenoids will take about</div><div>2 weeks to get here.</div><div>Alan</div><div><br clear="none"></div><div class="yiv4729897271yqt8395275534" id="yiv4729897271yqt39899"><div><br clear="none">On 29/10/2018, at 8:29 AM, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div class="yiv4729897271ydp673e4880yahoo-style-wrap" style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Alan,</div><div>Why don't you just make a housing for the solenoids and oil fill. That is one of my first projects when I get back to the sub.</div><div>Hank</div><div><br clear="none"></div>
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On Sunday, October 28, 2018, 12:46:29 PM MDT, Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="yiv4729897271"><div><div></div><div>Hank,</div><div>yes just making fun of you! It's an old English saying! </div><div>Thanks Alec, I see I have already "liked" them. Nice piece of work.</div><div>You guys got me inspired & I ordered a couple of solenoids to modify Vance's</div><div>mushroom valve design & make it electric. I will have to waterproof the solenoids,</div><div>which will involve machining the plunger so I can coat it & it's iron tube</div><div>receptacle with resin.</div><div>The force varies depending on how far out the plunger is & on one I</div><div>ordered it varied between 1 & 10kg; unfortunately I'll get a reduction in force</div><div>after coating everything with resin. I am not sure how much spring force I should </div><div>need to close it yet.</div><div>Alan</div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div> </div><div class="yiv4729897271yqt6882171366" id="yiv4729897271yqt40590"><div><br clear="none">On 29/10/2018, at 6:49 AM, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div class="yiv4729897271ydp24089625yahoo-style-wrap" style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Have you guys never heard the saying "on pins and needles" or are you just making fun of me </div><div>Hank</div><div><br clear="none"></div>
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On Sunday, October 28, 2018, 8:33:01 AM MDT, Alec Smyth via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="yiv4729897271"><div><div dir="ltr"><div dir="ltr">Yeah, I'm not sure what Hank was talking about concerning piss and needles, it doesn't sound good at all. But Alan, scroll down on this page and you'll see the valves...<div><br clear="none"></div><div><a rel="nofollow" shape="rect" target="_blank" href="https://www.facebook.com/pg/INNERSPACESCIENCE/posts/">https://www.facebook.com/pg/INNERSPACESCIENCE/posts/</a><br clear="none"></div><div><br clear="none"></div></div></div><br clear="none"><div class="yiv4729897271gmail_quote"><div class="yiv4729897271yqt1412448662" id="yiv4729897271yqt66809"><div dir="ltr">On Sat, Oct 27, 2018 at 10:29 PM Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></div><blockquote class="yiv4729897271gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div></div><div>Hank,</div><div>glad you clarified that, it read like you were an alcoholic & junky.</div><div>What valves were they? I haven't received any posts lately &</div><div>were wondering if I had missed some.</div><div>Alan </div><div> </div><div><br clear="none">On 28/10/2018, at 1:20 PM, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div class="yiv4729897271m_97519995167016728ydp8f7d0dd3yahoo-style-wrap" style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;"><div></div>
<div>Pins</div><div><br clear="none"></div><div><br clear="none"></div>
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On Saturday, October 27, 2018, 6:19:32 PM MDT, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:
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<div><div id="yiv4729897271m_97519995167016728yiv9191911722"><div><div>Alec,</div><div>I am on pis and needles waiting to hear about your new valves and how they perform. Have you tested them?</div><div>Hank</div><div class="yiv4729897271m_97519995167016728yiv9191911722ydp928edd70yahoo-style-wrap" style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;"></div></div></div>_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div>
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