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--></style></head><body lang="EN-US" link="blue" vlink="purple"><p dir="ltr">How sensitive are LED drivers to supply voltage stability? If I were to, for example, feed the LED light with 24 VDC that must first pass through a set of electrical slip rings, would any fluctuation in resistance or momentary interruption to the supply harm the light?</p>
<p dir="ltr">Sean<br>
</p>
<br><br><div class="gmail_quote">On July 26, 2015 6:38:23 AM MDT, Ken Martindale via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Basically that’s the same for this light except it will shut off until it cools down, take a look at the spec.<p></p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><p> </p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Ken<p></p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><p> </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> Saturday, July 25, 2015 9:21 PM<br /><b>To:</b> Personal Submersibles General Discussion <personal_submersibles@psubs.org><br /><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights<p></p></span></p></div></div><p class="MsoNormal"></p><p> </p><div><div id="yui_3_16_0_1_1437872182587_4678"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Thanks for that info Hugh.<p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_4680"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">This extract from a manual below, is for a 700lm light. So heating as you say will be a big issue.<p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_4680"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">How hard is thermal rollback
Ken???.....<p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_4680"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> General Notes and Warnings The Nano SeaLite can be run in air, but will go into thermal rollback, where its light output diminishes to protect the light from overheating. This is normal and purposely designed to protect the LEDs from being damaged by excess heat buildup while running in air. The light will return to full brightness once it is submerged in water or it’s allowed to cool down. This thermal rollback will not happen when light is being operated in water under normal usage. WARNING When the Nano SeaLite is operated in air the body may reach temperatures in excess of 65° C. These temperatures may be enough to cause burns if the light is handled without protective clothing.<p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_4680"><p class="MsoNormal"
style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Alan<p></p></span></p></div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><p> </p></span></p><div id="yui_3_16_0_1_1437872182587_4833"><div id="yui_3_16_0_1_1437872182587_4832"><div id="yui_3_16_0_1_1437872182587_4831"><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"> Hugh Fulton 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> Sunday, July 26, 2015 12:34 PM<br /><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5427"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><p> </p></span></p><div id="yiv0983907785"><div id="yui_3_16_0_1_1437872182587_5426"><div id="yui_3_16_0_1_1437872182587_5425"><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">40 degrees gives you 30 degrees</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5424"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">120 degrees gives
you 80 degrees</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5429"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">It doesn’t matter whether acrylic, Glass or borosilicate with flat planes.</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5432"><div id="yui_3_16_0_1_1437872182587_5431"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">The only reservation on my lights is that I have not done a lens for the seawater to optimise angles etc. Also my reflector is round with a square LED.</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5433"><p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Looks great in the swimming pool at night but as I haven’t dived it I have no experience as to how it will look in the sea.</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5436"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> With a really compact light and 94 watts of heat it is not going to last long in the air. It will need serious fins. Needs to be idiot proof.</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5438"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">One thing is that it needs to have automatic dimming reduction for temperature so it does not desolder or destroy O’rings
etc.</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5440"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">I will try and work out how the forum works and go to that. I could not get into it but could view it. </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5441"><p class="MsoNormal" style="background:white"><span lang="EN-NZ" style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Hugh</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div></div><div id="yui_3_16_0_1_1437872182587_5442"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span
style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Helvetica",sans-serif;color:black"><p> </p></span></p></div><div id="yiv0983907785yqt66921"><div id="yui_3_16_0_1_1437872182587_5445"><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in" id="yui_3_16_0_1_1437872182587_5444"><div id="yui_3_16_0_1_1437872182587_5443"><p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black"> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Ken Martindale via Personal_Submersibles<br /><b>Sent:</b> Sunday, 26 July 2015 11:58 a.m.<br /><b>To:</b> 'Personal Submersibles General
Discussion'<br /><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div></div></div><div id="yui_3_16_0_1_1437872182587_5447"><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5449"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">PS We are supposed to be discussing the LED light on the forum?</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5450"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5451"><p class="MsoNormal"
style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">ken</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5452"><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div id="yui_3_16_0_1_1437872182587_5454"><div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in" id="yui_3_16_0_1_1437872182587_5453"><div id="yui_3_16_0_1_1437872182587_5457"><p class="MsoNormal" style="background:white"><b><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org"
target="_blank">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Hugh Fulton via Personal_Submersibles<br /><b id="yui_3_16_0_1_1437872182587_5458">Sent:</b> Saturday, July 25, 2015 7:33 PM<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</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div></div></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Re- Dimming.</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span
style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Would it not be better to have 2 switchable intensities rather than variable. Then you can have a 3 position switch. Is it simpler?</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Hugh</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div
style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"><div><p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black"> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org" target="_blank">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Cliff Redus via Personal_Submersibles<br /><b>Sent:</b> Sunday, 26 July 2015 8:20 a.m.<br /><b>To:</b> Personal Submersibles General Discussion<br /><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black">Yes we did but we had two members that were pushing hard for dimming. From feedback, we were two for and two against. I would prefer not have it but if it makes the lite more generally accepted, I am willing to incorporate it. This last version of suggestions are just that, suggestions. A understand that nothing is frozen and we still do not have final consensus. <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff<p></p></span></p></div></div></div></div><div><div id="yiv0983907785yqt75518"><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><p
class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">On Sat, Jul 25, 2015 at 3:13 PM, Ken Martindale via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<p></p></span></p></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Cliff,</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Dimming, I thought we deleted this?</span><span
style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Ken</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><b><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;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>Cliff Redus via Personal_Submersibles<br /><b>Sent:</b> Saturday, July
25, 2015 3:29 PM<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</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Ken, I took you latest pass on spec and generated a one page summary. <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black">Cliff<p></p></span></p></div></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">On Sat, Jul 25, 2015 at 9:48 AM, Ken Martindale via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<p></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><div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">This light will require substantial cooling. Total
dissipation is about 94 watts.</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Puts out a lot of light. </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">Ken</span><span
style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black"> </span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><b><span style="font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;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>Cliff Redus via Personal_Submersibles<br /><b>Sent:</b> Saturday, July 25, 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</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Alan, my thinking is that with the flange, you could mount the light either way. On the new boat I am designing, I am planning a FRP recess so that outside of the flange is flush with the outside of the FRP shell. Would still need to cut a hole were the body passes through the FRP shell. Yes this does reduce the convection heat transfer from the light but I was thinking of leaving say a 3/8 clearance around the recessed flange. I don't see any problem with either approach to sealing on a MPB by using a neoprene flat gadget.<p></p></span></p></div></div><div><div><p class="MsoNormal"
style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff<p></p></span></p></div></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">On Fri, Jul 24, 2015 at 3:58 PM, Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<p></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><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff,<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">I was thinking of fitting the light in to a bowl shaped<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">recess in the fairing / ballast tank, whereas you were proposing<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">cutting a hole out & fitting it in. In hindsight your idea is better<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">because my idea would inhibit the heat dispersion due to the
fiberglass<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">surrounding the light fitting.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Alan<p></p></span></p></div></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><div><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><div><p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black"> Cliff Redus via Personal_Submersibles <<a
href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br /><b>To:</b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> <br /><b>Sent:</b> Saturday, July 25, 2015 8:43 AM<br /><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Alan, I am visual kind of guy. Can send me sketch of what you are describing and we can talk.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff<p></p></span></p></div></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">On Fri, Jul 24, 2015 at 3:23 PM, Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<p></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><div style="margin-bottom:12.0pt"><p
class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Looks a good solid light Cliff.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">On looking at the perpendicular cable entry, I was thinking we<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">need a back entry for the purposes of mounting in to a housing<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">in the fairing as you have requested in your list.<p></p></span></p></div></div><div><div><p class="MsoNormal"
style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">I am looking at mounting in to ballast tanks so will create the shape <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">of the light in the molding to receive it. If there was a threaded<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">extension on the back of the light it could slot through a hole & be secured<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">with a nut. This would make it easier to seal off the ballast tanks in<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">my
situation.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Alan<p></p></span></p></div></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><div><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><div><p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black"> Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br /><b>To:</b> Personal Submersibles General Discussion <<a
href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> <br /><b>Sent:</b> Saturday, July 25, 2015 1:55 AM<br /><b>Subject:</b> Re: [PSUBS-MAILIST] LED Lights</span><span style="font-family:"Helvetica",sans-serif;color:black"><p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Ken, if you go to Youtube and do a search on <a href="https://youtu.be/D7VnwODU7vk" target="_blank">https://youtu.be/D7VnwODU7vk</a>, or 5000 Lumen Bridgelux Vero 18 LED light, you will see a short video of the light.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p
class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff<p></p></span></p></div></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">On Thu, Jul 23, 2015 at 3:29 PM, Ken Martindale via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<p></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><div style="margin-bottom:12.0pt"><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff,<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">How do I look at them??<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Ken<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><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 4:18 PM<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<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><div><p class="MsoNormal"
style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Now that Jon has the forum site set up for the LED light project, my suggestion is to move the discussion to the forum site called out in Jon's email. BTW, I have uploaded to the site the wiring diagram and housing drawings for the 5000 Lumen light that was designed by the ME students I was mentoring last year.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff<p></p></span></p></div></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><p class="MsoNormal"
style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">On Thu, Jul 23, 2015 at 2:55 PM, Ken Martindale via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<p></p></span></p></div></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><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Doing the dimming electrically is easy but the problem is the extra wiring and where do you mount the Potentiometer?<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal"
style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">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.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">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.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">You guys be sure
to keep reading the spec. it will have almost daily updates for a while.<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Ken<p></p></span></p></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div style="border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;border-color:currentColor"><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>Alan James via Personal_Submersibles<br /><b>Sent:</b> Thursday, July 23, 2015 3:31 PM<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<p></p></span></p></div></div></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff, Ken,<p></p></span></p></div></div></div><div><div><div><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<p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><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<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">need to be as intense.<p></p></span></p></div></div></div><div><div><div><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,<p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><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<p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Alan<p></p></span></p></div></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><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><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"> Clifford Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br /><b>To:</b> Personal
Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">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<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><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?<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><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. <p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><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.<p></p></span></p></div></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><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:<p></p></span></p></div></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><div style="margin-bottom:12.0pt"><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cost is critical. The electronics should be a small part of the cost. The housing might be the most expensive.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Hope you guys are reading the
specification.<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Ken<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><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<p></p></span></p></div></div></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><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.<p></p></span></p></div></div></div></div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div><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. <p></p></span></p></div></div></div></div><div><div><div><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div><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. <p></p></span></p></div></div></div></div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">Cliff<p></p></span></p></div></div></div></div></div><div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div><div><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:<p></p></span></p></div></div></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><div><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><p></p></span></p></div></div></div></blockquote></div><div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div></div></div></div><div style="margin-bottom:12.0pt"><div><p class="MsoNormal" style="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><p></p></span></p></div></div></blockquote></div><div><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div><div><div><div><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" 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><p></p></span></p></div></div></div><div style="margin-bottom:12.0pt"><div><p class="MsoNormal" style="background:white"><span
style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div></div></div></div></div><div style="margin-bottom:12.0pt"><div><p class="MsoNormal" style="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><p></p></span></p></div></div></blockquote></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div></div></div><div style="margin-bottom:12.0pt"><p class="MsoNormal" style="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><p></p></span></p></div></blockquote></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div><div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black">_______________________________________________<br />Personal_Submersibles mailing list<br /><a
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style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div></div></div><div style="margin-bottom:12.0pt"><p class="MsoNormal" style="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><p></p></span></p></div></blockquote></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div><div style="margin-bottom:12.0pt"><p class="MsoNormal" style="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><p></p></span></p></div></blockquote></div><div><p class="MsoNormal" style="background:white"><span style="font-family:"Helvetica",sans-serif;color:black"> <p></p></span></p></div></div></div></div><div style="margin-bottom:12.0pt"><p class="MsoNormal" style="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"
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style="font-family:"Helvetica",sans-serif;color:black"><p> </p></span></p></div></div></div></div></div><p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />Personal_Submersibles mailing list<br />Personal_Submersibles@psubs.org<br /><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br /></pre></blockquote></div></body></html>