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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Doing the dimming electrically is easy but the problem is the extra wiring and where do you mount the Potentiometer?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>We can include the wires in the cable for use as an option this also complicates the cabling. Instead of two wires we would require 4 wires.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Personally I also like the dimming since it will extend the time you can use it out of the water. Anybody also like or dislike? Cliff would like to delete.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>You guys be sure to keep reading the spec. it will have almost daily updates for a while.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Ken<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br><b>Sent:</b> Thursday, July 23, 2015 3:31 PM<br><b>To:</b> Personal Submersibles General Discussion <personal_submersibles@psubs.org><br><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id="yui_3_16_0_1_1437677457418_10294"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Cliff, Ken,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10296"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I like the dimming option. The 10,000 lumens may be too much light in<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>some low visibility conditions where there is a lot of back scatter.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>The 5,000 lumen option may act like a fog light.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Also I am thinking of having lights mounted to the side which may not<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>need to be as intense.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Depth rating.... looking at the drawings of various 10,000 meter light housings,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>it seems simple to achieve a reasonable depth without much more cost.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Potting the board..... I would be careful about what was potted in case some of the<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>components needed to get rid of a bit of heat.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Mechanical housing..... with you on that one Cliff. Like the idea of the recessed light.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10297"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Alan<o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p><div id="yui_3_16_0_1_1437677457418_10539"><div id="yui_3_16_0_1_1437677457418_10538"><div id="yui_3_16_0_1_1437677457418_10537"><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='background:white'><b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'> Clifford Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br><b>To:</b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br><b>Sent:</b> Friday, July 24, 2015 4:06 AM<br><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10540"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p><div id=yiv7873939557><div id="yui_3_16_0_1_1437677457418_10543"><div id="yui_3_16_0_1_1437677457418_10542"><div id="yui_3_16_0_1_1437677457418_10541"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Ken, good first pass at the specs. Below are comments. BTW, I will post these here as I have not been able to get the activation code back yet on registering at the forum.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10544"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10545"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Item 2.1 DC Voltage. If it were me, I would stick with nominal battery bank voltages of 24 and 36 VDC. When I switch to MK 101 thrusters, I dropped my main battery bank voltage to 36VDC my instrumentation bus is 24VDC. Would need a single fuse holder to accept fuses to handle different nominal voltages.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10678"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10547"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Item 4.0 Depth Requirement. In the spirit of keeping cost down, I think 500 meters (1640 ft) would be more than enough. I know Scott is designing a deep diving boat but is any one else shooting for more than 500m?<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10896"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10706"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>6.0 Dimming. I would omit the ability to dim the light. Yes I know it is easy from an electrical point of view but it forces us to go with more pins on the subsea connector. I am thinking on installing multiple lighs so I could just control on/off for each light. I could go either way on this but in the spirit of KISS, I vote to omit dimming.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10709"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10708"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>8.3 Ports I would change plastic to acrylic. I don't think we will end up here but if we do, we can use PVHO flat view port calcs to size the acrylic lens.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10712"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10711"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>9.0 Printed Wiring Boards. I really like the way the Minn-Kota motor controller PWBs are potted. Rather than using the spray on hydrophobic coatings, to me we should pot the board (accept for access to fuse). Therefore suggest changing the word coated to potted.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10760"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10762"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>11.0 Mechanical Housing. I suggest. The LED panel light and PCB shall be contained in a single 1-atm flange mounted cylindrical housing with a low profile that can be recessed in a FRP shell with attachment screws from the rear of the flange. The housing should contain a single 29 LED Array rated at 10,000 lumens with a rated power of 91-140 lumens/W (109-71W). Mounting holes will be provided for an optional SS yoke style support bracket. <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10900"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id="yui_3_16_0_1_1437677457418_10899"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Material: Hard anodized 6061-T6 or 7071-T6 TBD (I have a grey beard machinist friend that owns a machine shop. He loves 7071-T6 as it is a dream to machine and stronger than 6061-T6.<o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1437677457418_11004"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p><div id="yui_3_16_0_1_1437677457418_11003"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>On Thu, Jul 23, 2015 at 9:52 AM, Ken Martindale via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id=yiv7873939557yqt06223><div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:#1F497D'>Cost is critical. The electronics should be a small part of the cost. The housing might be the most expensive.</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:#1F497D'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:#1F497D'>Hope you guys are reading the specification.</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:#1F497D'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:#1F497D'>Ken</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:#1F497D'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><b><span style='font-family:"Helvetica",sans-serif;color:black'>From:</span></b><span style='font-family:"Helvetica",sans-serif;color:black'> Personal_Submersibles [mailto:<a href="mailto:personal_submersibles-bounces@psubs.org" target="_blank">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Clifford Redus via Personal_Submersibles<br><b>Sent:</b> Thursday, July 23, 2015 10:18 AM<br><b>To:</b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Jon, thanks for setting up the forum. I am assuming we can post files as well.<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> I agree low cost is important but having a functioning light is as well. OTS LED utility lights like that one you noted are not an option unless they can be potted. To me the best way to keep the cost low, is to publish construction drawings of a 1-atm DIY housing that a psubber could machine or have machined by a friend, and publish a design of a PCB that could be easily fabricated using one of the PCB online sites like ExperessPCB <a href="http://www.expresspcb.com/" target="_blank">www.expresspcb.com</a> and DIY populate the board. As a group, we design and build a prototype that I can test in my shop. If it works as designed, then we post to the psubs site a report, that includes the design drawings, circuit diagram, parts list and test results. <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Getting a consciences on the design spec is the first step. <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Cliff<o:p></o:p></span></p></div></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>On Wed, Jul 22, 2015 at 10:11 PM, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid windowtext 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;border-color:currentColor currentColor currentColor rgb(204,204,204)'><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>My three words of advice...cost, cost, cost.<br><br>One measure of a success for this project will be how many people actually build/use it. If it costs more to manufacture than just purchasing something like <a href="http://www.surpluscenter.com/Electrical/Lights/DC-Mobile-Equipment-Lights/12-24-VDC-3120-LUMEN-16-LED-UTILITY-FLOOD-LIGHT-12-999-B.axd" target="_blank">http://www.surpluscenter.com/Electrical/Lights/DC-Mobile-Equipment-Lights/12-24-VDC-3120-LUMEN-16-LED-UTILITY-FLOOD-LIGHT-12-999-B.axd</a> off the shelf then it's real world application by psubbers may be limited.<br><br>Over-spec'ing the design above requirements for typical recreational operations (ie 10,000 psi capability) is likely going to drive up the cost. Also, let's remember that "cheap", "low cost", and "good price" are relative terms for a diverse group like PSUBS so include realistic estimates of parts and manufacturing especially if tooling is required.<br><br>Jon<br><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></blockquote></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></blockquote></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div></div></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p><div id=yqt63867><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div></div></div></div></div></body></html>