<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office"><head><!--[if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1467491916183_2693"><span>Cliff,</span></div><div id="yui_3_16_0_ym19_1_1467491916183_2695"><span id="yui_3_16_0_ym19_1_1467491916183_2694">here is a video revue of a 40V buck converter constant currant driver.</span></div><div id="yui_3_16_0_ym19_1_1467491916183_2657" dir="ltr"><span id="yui_3_16_0_ym19_1_1467491916183_2682">This isn't the video I was looking for. He has one that covers most of</span></div><div id="yui_3_16_0_ym19_1_1467491916183_2680" dir="ltr"><span id="yui_3_16_0_ym19_1_1467491916183_2679">the available options for driving high power leds, but I'm heading out</span></div><div id="yui_3_16_0_ym19_1_1467491916183_2698" dir="ltr"><span>& he has a lot of videos.</span></div><div id="yui_3_16_0_ym19_1_1467491916183_2729" dir="ltr"><span>Alan</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1467491916183_2587" dir="ltr"><a class="enhancr2_e37bbeda-9c44-102e-56fd-36c748e44db8" id="yui_3_16_0_ym19_1_1467491916183_2697" href="https://www.youtube.com/watch?v=S_KjmF1iI9w">Review: 3A 40V Digital Buck DC/DC Converter - It's more like a Bench PSU!</a><br><br></div><div id="yui_3_16_0_ym19_1_1467491916183_2709"><br></div><div class="yahoo-link-enhancr-card ymail-preserve-class ymail-preserve-style img-overlay-selected" id="enhancr2_e37bbeda-9c44-102e-56fd-36c748e44db8" style='font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; 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vertical-align: top; background-color: rgb(255, 255, 255);"> <img height="32" class="card-object-1 yahoo-ignore-inline-image ymail-preserve-class" style="border: 1px solid rgb(224, 228, 233); border-image: none; margin-top: 3px; min-width: 32px;" src="https://s.yimg.com/nq/storm/assets/enhancrV2/23/logos/youtube.png" data-id="47de79a0-d384-a4fe-4959-caaf7aec0866"> </td> <td style="padding: 16px 12px; width: 99%; vertical-align: middle;"> <h2 class="card-title" style='margin: 0px 0px 4px; line-height: 19px; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px;'>Review: 3A 40V Digital Buck DC/DC Converter - It's more like a Bench PSU!</h2> <div class="card-description" style="color: rgb(153, 153, 153); line-height: 15px; font-size: 11px;">This digitally controlled buck converter is so stacked with features, it's more like a miniature bench power...</div> </td> <td id="yui_3_16_0_ym19_1_1467491916183_2730" style="padding: 16px 12px 16px 0px; text-align: right;"> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </a></div><div><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1467491916183_2602" style="display: block;"> <div id="yui_3_16_0_ym19_1_1467491916183_2601" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1467491916183_2600" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1467491916183_2599" dir="ltr"> <font id="yui_3_16_0_ym19_1_1467491916183_2598" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Alan via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Sunday, July 3, 2016 8:05 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] PSUBS light project status<br> </font> </div> <div class="y_msg_container"><br><div id="yiv5870558479"><div><div>Cliff,</div><div>what voltage are you running on your sub?</div><div>You can generally run these leds at a lower voltage & it is </div><div>beneficial to them. If you have a bench top power supply that goes to 36V, you can</div><div>slowly power up the led without a driver & check if it is bright enough at 36V. Don't</div><div>do this for more than a second or so or you may destroy the led. I am having a 48V </div><div>system, but the choices in electronics that are compatible, dramatically drops over a 36V system.</div><div>I have looked at just about every off the shelf led dc driver on the planet.</div><div>cheers Alan</div><div><br clear="none"></div><div><br clear="none"><br clear="none">Sent from my iPad</div><div class="yiv5870558479yqt6496607393" id="yiv5870558479yqt06951"><div><br clear="none">On 3/07/2016, at 7:03 am, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div dir="ltr"><div>This LED driver will not work for the 10K lumen Bridgelux LED as it needs 38V forward voltage , 2.1 amps and 80W. This driver can only get up to 36V.</div><div><br clear="none"></div><div>Cliff</div></div><div class="yiv5870558479gmail_extra"><br clear="none"><div class="yiv5870558479gmail_quote">On Fri, Jul 1, 2016 at 11:39 PM, Alan James via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv5870558479gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div><span></span></div><div>Alec,</div><div>I have been working on a light housing. Have attached a dwg but it is not finalized.</div><div>I would have had it completed but have been waiting a Month on a replacement motor</div><div>for my lathe :(</div><div>I am using a square 50W LED, but you can get 60 & 80W LEDs the same size.</div><div>I am NOT putting the driver in the light housing, it ends up sitting at the back of the LED</div><div dir="ltr">where there is a massive amount of heat generated from these high power LEDs.</div><div dir="ltr">Keeping the driver in the hull makes it easy to change out if it fails. </div><div dir="ltr">I am going with an acrylic lens & oil compensated. I would have liked a borosilicate pressure</div><div dir="ltr">resistant lens but it was going to cost $100-+. Also if there is a leak with a pressure resistant</div><div dir="ltr">housing, electrolysis can pressurize it with hydrogen gas.</div><div dir="ltr">I am not using a reflector as they don't seem to do anything with these big LEDs. They are really</div><div dir="ltr">rows of little 1W LEDs,10X6 for a 60W. So you get light being emitted from either side of the inch</div><div dir="ltr">wide emitter, that is hard to control, especially when you are wanting an 80 degree wide angled</div><div dir="ltr">flood light.</div><div dir="ltr">My design also revolves around local stock aluminum tube sizes.</div><div dir="ltr">The LEDs are around 30 to 36V. I am using these as drivers. $4.64 US, not bad.</div><div dir="ltr">Alan</div><div dir="ltr"><a href="http://www.dx.com/p/5a-constant-current-led-driver-module-battery-charger-red-433947#.V3dE1bh96Uk" target="_blank" rel="nofollow" shape="rect">Constant Voltage Constant Current DC-DC Power Module for Arduino</a><br clear="none"><br clear="none"></div><div><br clear="none"></div><div dir="ltr"> <a style="color: rgb(0, 0, 0) !important; text-decoration: none !important;" href="http://www.dx.com/p/5a-constant-current-led-driver-module-battery-charger-red-433947#.V3dE1bh96Uk" target="_blank" rel="nofollow" shape="rect"> <table style="max-width: 400px;" border="0" cellspacing="0" cellpadding="0"><tbody><tr><td width="400" rowspan="1" colspan="1"> <table width="100%" style="max-width: 400px;" border="0" cellspacing="0" cellpadding="0"><tbody><tr><td height="" valign="top" bgcolor="#000000" rowspan="1" colspan="1"> <table style="width: 100%;" border="0" cellspacing="0" cellpadding="0"><tbody><tr><td height="" valign="top" bgcolor="transparent" rowspan="1" colspan="1"> <table height="185" style="width: 100%; min-height: 185px;"><tbody><tr><td style="padding: 15px 0px 0px 15px; text-align: left; vertical-align: top;" rowspan="1" colspan="1"> <span style="color: rgb(255, 255, 255); font-size: 18px; font-weight: bold;"> $ 4.64 </span> </td><td style="padding: 15px 15px 0px 0px; text-align: right; vertical-align: top;" rowspan="1" colspan="1"> <div></div> </td></tr></tbody></table> </td></tr></tbody></table> </td></tr><tr><td rowspan="1" colspan="1"> <table align="center" style="background: rgb(255, 255, 255); border-width: 1px 1px 3px; border-style: solid; border-color: rgb(224, 228, 233) rgb(224, 228, 233) rgb(0, 0, 0); width: 95%; margin-right: auto; margin-left: auto; max-width: 380px;" border="0" cellspacing="0" cellpadding="0"><tbody><tr><td style="padding: 16px 0px 16px 12px; vertical-align: top; background-color: rgb(255, 255, 255);" rowspan="1" colspan="1"> </td><td style="padding: 16px 12px; width: 99%; vertical-align: middle;" rowspan="1" colspan="1"> <h2 style="margin: 0px 0px 4px; line-height: 19px;">Constant Voltage Constant Current DC-DC Power Module for Arduino</h2> <div style="color: rgb(153, 153, 153); line-height: 15px; font-size: 11px;">I like this from DX. Find the cool gadgets at a incredibly low price with worldwide free shipping here.</div> </td><td style="padding: 16px 12px 16px 0px; text-align: right;" rowspan="1" colspan="1"> </td></tr></tbody></table> </td></tr></tbody></table> </td></tr></tbody></table> </a></div><div><br clear="none"></div><div style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"> <font face="Arial" size="2"> </font><hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, July 2, 2016 1:41 PM<br clear="none"> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] PSUBS light project status<br clear="none"> </div> <div><br clear="none"><div><div dir="ltr">Hi gents,<div><br clear="none"></div><div>I have an almost-ready sub but no lights, so was wondering whether to make them per the PSUBS-designed model in the community projects section of the website. I'm in awe of those drawings! However, they show a printed wiring board that is a placeholder for a part still to be designed. I was wondering if that might have happened, or if there might be an ETA? </div><div><br clear="none"></div><div>Thanks,</div><div><br clear="none">Alec</div></div></div><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"><br clear="none"><br clear="none"></div> </div> </div> </div></div></div><br clear="none">_______________________________________________<br clear="none">
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