<div dir="ltr"><div>Alan/ALec, ran across this small DC-DC boost converter for $4 on Ebay <a href="http://www.ebay.com/itm/222115591904?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT">http://www.ebay.com/itm/222115591904?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT</a>. This is not an LED driver as it does nothing but boost the voltage but for those that want to use this 10K Bridgelux LED array on a 24VDC buss, it should work. </div><div><br></div><div>Modules nature: Non-isolated step-up (Boost)<li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" face="Arial" size="3" style="margin:0px;padding:0px">Rectification: Non-synchronous rectification</font></p><li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" face="Arial" size="3" style="margin:0px;padding:0px">Input voltage: 3.5V-35V </font></p><li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" face="Arial" size="3" style="margin:0px;padding:0px">Output voltage: 5V-56V (Must ensure that set the output voltage is higher than the input voltage)</font></p><li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" face="Arial" size="3" style="margin:0px;padding:0px">Input current: 3A (max), Rated current:2A</font></p><li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" face="Arial" size="3" style="margin:0px;padding:0px">Conversion efficiency: 90% </font></p><li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" face="Arial" size="3" style="margin:0px;padding:0px">Dimension: 43mm(1.69")*30mm(1.18")*12mm(.47") (about the size of two postage stamps)</font></p></li><li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" size="3"><br></font></p></li><li style="margin:0px;padding:0px"><p class="MsoNormal"><font color="#000000" size="3"></font>This dimension would easily fit in the 1 atm enclosure I designed and in fact, we may be able to shrink the enclosure even more. I have ordered some to play around with along with the Bridgelux LED <a href="http://www.digikey.com/product-search/en?keywords=976-1277-ND">http://www.digikey.com/product-search/en?keywords=976-1277-ND</a></p></li></li></li></li></li></li></div><div class="MsoNormal" style="margin:0px;padding:0px"><br></div><div class="MsoNormal" style="margin:0px;padding:0px">To use this on my boat, I would have to rewire my HV box to feed the exterior lights of the regulated 24VDC buss rather than the unregulated 36VDC battery bank but this would be easy.</div><div class="MsoNormal" style="margin:0px;padding:0px"><br></div><div class="MsoNormal" style="margin:0px;padding:0px"> Would be better to get a proper LED driver but this might do until someone sources a small LED driver that fit the spec Ken developed.</div><div class="MsoNormal" style="margin:0px;padding:0px"><br></div><div><li style="margin:0px;padding:0px"><p class="MsoNormal"><br></p></li><li style="margin:0px;padding:0px"><p class="MsoNormal">Cliff<br></p></li></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Jul 2, 2016 at 3:05 PM, Alan via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><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></div><div><br><br>Sent from my iPad</div><div><br>On 3/07/2016, at 7:03 am, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br><br></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></div><div>Cliff</div></div><div class="gmail_extra"><br><div class="gmail_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">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_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">Constant Voltage Constant Current DC-DC Power Module for Arduino</a><br><br></div><div><br></div><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;max-width:400px" 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="noreferrer"> <table style="max-width:400px" border="0" cellspacing="0" cellpadding="0"> <tbody><tr> <td width="400"> <table width="100%" style="max-width:400px" border="0" cellspacing="0" cellpadding="0"> <tbody><tr> <td background="https://s.yimg.com/vv//api/res/1.2/3Gy3q6fb5RPODVCmFJEp0w--/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MjAwO3c9NDAw/http://img.dxcdn.com/productimages/sku_433947_1.jpg.cf.jpg" valign="top" style="background: url("https://ci4.googleusercontent.com/proxy/vp3MB4PyucrbkudRQgMFwak4Cva9UgtQx7VyWhqv3B26pkOXMsoHeYeBNnZh7jjenj6oYTEAJAi8ASwFKEqfhiXqsQ1jC3quKZTh3V__-GwZNxCq93uLeGc_J3Uo4Ud2KriOZ0xRIozHW4AdehGWGXNH33nRErDW2k3shrNbC-2iPMckSZgtmYR4SqlmH-aipoODGrcXDggClsFkb4n050iAP61zbzIWzF0stl1Na-Quq4Kgxxw=s0-d-e1-ft#https://s.yimg.com/vv//api/res/1.2/3Gy3q6fb5RPODVCmFJEp0w--/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MjAwO3c9NDAw/http://img.dxcdn.com/productimages/sku_433947_1.jpg.cf.jpg") no-repeat center / cover rgb(0, 0, 0); height: 200px;" bgcolor="#000000"> <table style="width:100%" border="0" cellspacing="0" cellpadding="0" valign="top"> <tbody><tr> <td background="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png" valign="top" style="background: url("https://ci6.googleusercontent.com/proxy/Or0PpNz8Q2N-T77lb2rdWKcTmD4Aucmk2Ee_LS8DyP6g6BDF3rwx4OyZl6lsUYsZqw8AQBiEM0n0IXQQ0XX4vUAoRYgzG6vu_JFg3P_OaiyHSXs0y-U=s0-d-e1-ft#https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png") left top; height: 200px;" bgcolor="transparent"> <table height="185" style="width:100%;height:185px;min-height:185px"> <tbody><tr> <td style="padding:15px 0px 0px 15px;text-align:left;vertical-align:top"> <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"> <div></div> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> <tr> <td> <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)"> </td> <td style="padding:16px 12px;width:99%;vertical-align:middle"> <h2 style="margin:0px 0px 4px;line-height:19px;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:16px">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"> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </a></div><div><br></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"> <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">personal_submersibles@psubs.org</a>><br> <b><span style="font-weight:bold">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> <br> <b><span style="font-weight:bold">Sent:</span></b> Saturday, July 2, 2016 1:41 PM<br> <b><span style="font-weight:bold">Subject:</span></b> [PSUBS-MAILIST] PSUBS light project status<br> </font> </div> <div><br><div><div dir="ltr">Hi gents,<div><br></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></div><div>Thanks,</div><div><br>Alec</div></div></div><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><br><br><br></div> </div> </div> </div></div></div><br>_______________________________________________<br>
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