<html><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_1_1441247476867_2837"><span id="yui_3_16_0_1_1441247476867_3292">OK Cliff;</span></div><div id="yui_3_16_0_1_1441247476867_2834"><span id="yui_3_16_0_1_1441247476867_2833">I am making up a 36V 60W light with the LED driver in the hull.</span></div><div id="yui_3_16_0_1_1441247476867_2834">Thanks Hank for the suggestion.</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">I can still try out Ken's driver, along with the driver I have, & the others I have on order.</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">I am thinking of just glueing a lense on to the light housing. This will reduce the</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">profile & save a lot of work machining screw holes, o-ring grooves & a clamping plate.</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">Have run my 60W emitter for a couple of hours & it isn't getting exsessively hot out the front</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">so am looking at the acrylic lense option that I previously thought may not be too good.</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">If I want to re-use the housing, should the emitter fail, I can mill out the acrylic lense.</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">Or just throw away.</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr">Alan</div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr"><br></div><div id="yui_3_16_0_1_1441247476867_2834" dir="ltr"><br></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1441247476867_2706"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1441247476867_2705"> <div dir="ltr" id="yui_3_16_0_1_1441247476867_2704"> <hr size="1" id="yui_3_16_0_1_1441247476867_2930"> <font size="2" face="Arial" id="yui_3_16_0_1_1441247476867_2703"> <b><span style="font-weight:bold;">From:</span></b> Cliff Redus 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> Thursday, September 3, 2015 11:43 AM<br> <b id="yui_3_16_0_1_1441247476867_9271"><span style="font-weight: bold;" id="yui_3_16_0_1_1441247476867_9270">Subject:</span></b> Re: [PSUBS-MAILIST] Light lense<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1441247476867_4134"><br><div id="yiv3720663409"><div id="yui_3_16_0_1_1441247476867_4137"><div dir="ltr" id="yui_3_16_0_1_1441247476867_4136"><div id="yui_3_16_0_1_1441247476867_4135">I am with Ken on this. The spec is written and that is what we have been designing to. I think having a second enclosure in the pressure hull to hold most of the electronics would work and you could run multiple lights off this hub. Deep Sea Power and Light have an LED option like this. Having said that, for this first light, I think we should stick with the spec and design a self contained 10K light. Nothing prevents anyone from taking the electronics design that Ken comes up with and the housing that I develop and morph these in one way or another to fit their need. </div><div id="yui_3_16_0_1_1441247476867_4801"><br clear="none"></div><div id="yui_3_16_0_1_1441247476867_4802">Cliff</div><div id="yui_3_16_0_1_1441247476867_4800"><br clear="none"></div><div id="yui_3_16_0_1_1441247476867_7733"><br clear="none"></div></div><div class="yiv3720663409gmail_extra" id="yui_3_16_0_1_1441247476867_7721"><br clear="none"><div class="yiv3720663409gmail_quote" id="yui_3_16_0_1_1441247476867_7720">On Wed, Sep 2, 2015 at 5:54 PM, Ken Martindale via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv3720663409gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;" id="yui_3_16_0_1_1441247476867_7719"><div class="qtdSeparateBR"><br><br></div><div class="yiv3720663409yqt2376405761" id="yiv3720663409yqt05459"><div lang="EN-US" id="yui_3_16_0_1_1441247476867_7718"><div id="yui_3_16_0_1_1441247476867_7717"><div class="yiv3720663409MsoNormal" id="yui_3_16_0_1_1441247476867_7732"><span style="color:rgb(31,73,125);" id="yui_3_16_0_1_1441247476867_7731">Putting the driver in the hull is certainly feasible and has appeal but that requires a change in our spec and Cliff needs to wade into this.<u></u><u></u></span></div><div class="yiv3720663409MsoNormal" id="yui_3_16_0_1_1441247476867_7716"><span style="color:rgb(31,73,125);"><u></u> <u></u></span></div><div class="yiv3720663409MsoNormal"><span style="color:rgb(31,73,125);">That’s why we wrote the spec. not as a cast in concrete but what most of the PSubs wanted (maybe).<u></u><u></u></span></div><div class="yiv3720663409MsoNormal"><span style="color:rgb(31,73,125);"><u></u> <u></u></span></div><div class="yiv3720663409MsoNormal" id="yui_3_16_0_1_1441247476867_7730"><span style="color:rgb(31,73,125);" id="yui_3_16_0_1_1441247476867_7729">Bear in mind the driver will still need a small heat sink to dissipate about 11 or 12 watts and that makes the light into two parts.<u></u><u></u></span></div><div class="yiv3720663409MsoNormal"><span style="color:rgb(31,73,125);"><u></u> <u></u></span></div><div class="yiv3720663409MsoNormal"><span style="color:rgb(31,73,125);">We certainly need the LEDs to be cooled by the water.<u></u><u></u></span></div><div class="yiv3720663409MsoNormal" id="yui_3_16_0_1_1441247476867_7728"><span style="color:rgb(31,73,125);"><u></u> <u></u></span></div><div class="yiv3720663409MsoNormal"><span style="color:rgb(31,73,125);">Ken<u></u><u></u></span></div><div class="yiv3720663409MsoNormal"><span style="color:rgb(31,73,125);"><u></u> <u></u></span></div><div id="yui_3_16_0_1_1441247476867_7726"><div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(225,225,225) currentColor currentColor;padding:3pt 0in 0in;" id="yui_3_16_0_1_1441247476867_7725"><div class="yiv3720663409MsoNormal" id="yui_3_16_0_1_1441247476867_7724"><b><span style="">From:</span></b><span style="" id="yui_3_16_0_1_1441247476867_7727"> Personal_Submersibles [mailto:<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br clear="none"><b>Sent:</b> Wednesday, September 02, 2015 6:07 PM<br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Light lense<u></u><u></u></span></div></div></div><div class="yiv3720663409MsoNormal" id="yui_3_16_0_1_1441247476867_7723"><u></u> <u></u></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Ken,<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">it may be worth looking at whether we design this light with the driver in the hull.<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I have covered this in another email, but additionally, the commercial standing<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">lamp I saw, that was using the latest 100W LED array had alluminium heat sinks<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">about 3" long & about 10 of them, out the back. So heat will be a big problem.<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">If we keep the driver in the hull it won't get cooked, & we can heat sink the emitter<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">straight to the back of the housing where it will be cooled by water.<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Alan<u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><u></u> <u></u></span></div></div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><u></u> <u></u></span></div><div><div><div><div align="center" class="yiv3720663409MsoNormal" style="background:white;text-align:center;"><span style="color:black;"></span><hr align="center" width="100%" size="1"></div><div class="yiv3720663409MsoNormal" style="background:white;"><b><span style="color:black;">From:</span></b><span style="color:black;"> Ken Martindale via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> 'Personal Submersibles General Discussion' <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Thursday, September 3, 2015 9:54 AM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Light lense</span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><u></u> <u></u></span></div><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Alan,</span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Usually if the driver is a true current source the extra wire doesn’t make much difference (within reason).</span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Also most drivers filter the switching waveform so the current to the LED is mostly a dc tern with a very low AC component.</span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Take a look at the design we have on the forum tomorrow late to see what the present design is.</span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Ken</span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;margin-bottom:12pt;"><span style="color:black;"><u></u> <u></u></span></div></div><div><div><div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(225,225,225) currentColor currentColor;padding:3pt 0in 0in;"><div><div class="yiv3720663409MsoNormal" style="background:white;"><b><span style="color:black;">From:</span></b><span style="color:black;"> Personal_Submersibles [<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>On Behalf Of </b>Alan via Personal_Submersibles<br clear="none"><b>Sent:</b> Monday, August 31, 2015 8:49 PM<br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Light lense</span><span style="color:black;"><u></u><u></u></span></div></div></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Hank, that's a good question for Ken.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">As I understand it, the LED drivers have a switching frequency so are turning on & off<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">the power to the LED. When electricity runs through wire it creates a magnetic field &<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">when the power is switched off, the magnetic field collapses & causes a surge of electricity.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Like a coil in a car creating a spark across a spark plug. The LED doesn't like this. <u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">The longer the run of wire, the more inductance is created. The capacitor is a buffer for this<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">& there are big ones on high power LED drivers. They are there to combat the inductance from <u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">the battery to the driver, but by lengthening the wiring from driver to LED you create the <u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">problem out the other side. Perhaps a capacitor could be placed in the light fitting, & the<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">driver in the pressure hull. This would reduce the footprint inside the fitting & stop the rest of the electronics from being exposed to any heat build up. you would still have the problem<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">of pressure on the capacitor if you compensated though. Have seen pressure resistant<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">capacitors, but don't know enough about them.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I will go & see a friend who is an expert on this.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Alan<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><br clear="none">Sent from my iPad<u></u><u></u></span></div></div></div><div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><br clear="none">On 1/09/2015, at 11:20 am, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<u></u><u></u></span></div></div></div><blockquote style="margin-top:5pt;margin-bottom:5pt;"><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Alan,v</span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Why can't the driver stay inside the submarine, why put it in the housing?</span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Hank</span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">On Monday, August 31, 2015 4:55 PM, Alan James via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span><span style="color:black;"><u></u><u></u></span></div></div></div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div><div><div><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Hank,<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">you have got me thinking. I don't want to pressure compensate because of the capacitors<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">in the driver. I was also concerned that any fluid might yellow with the heat.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">According to this article, the main problem with LED lights is disipating the heat that comes<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">out the back of the emmitter.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;margin-bottom:12pt;"><span style="color:black;"><a rel="nofollow" shape="rect" target="_blank" href="http://www.deepsea.com/wp-content/uploads/article-Application-of-High-Power-LEDs-UI08.pdf">http://www.deepsea.com/wp-content/uploads/article-Application-of-High-Power-LEDs-UI08.pdf</a><u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I could seal off the driver compartment at the back of the emmitter & fill that with oil. However<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I will be machining this out of alluminium rod & can keep the enclosure round the driver pretty small<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">so there isn't much of an air gap to the housing.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Could easily experiment with & without oil to see if it makes much difference.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Alan<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div><div><div><div><div><div align="center" class="yiv3720663409MsoNormal" style="background:white;text-align:center;"><span style="color:black;"></span><hr align="center" width="100%" size="1"></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><b><span style="color:black;">From:</span></b><span style="color:black;"> hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"><b>To:</b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"><b>Sent:</b> Tuesday, September 1, 2015 10:09 AM<br clear="none"><b>Subject:</b> Re: [PSUBS-MAILIST] Light lense</span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div><div><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Alan,</span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I assume your going with a pressure housing? why not fill the pressure housing 95% full of oil to tsf the heat to the water?</span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Hank</span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div><div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> </span><span style="color:black;"><u></u><u></u></span></div></div></div><div><div><div><div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div></div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">On Monday, August 31, 2015 4:00 PM, Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span><span style="color:black;"><u></u><u></u></span></div></div></div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div><div><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Sorry part 2 ( ipad & big fingers)<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">The LED cost $11- & the driver $6-. Free delivery.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I have ordered a number of reflectors for a couple of dollars each.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">The driver is quite small. With the automated assembly processes<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">& micro sized components, you can't get anywhere near this size<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">soldering on the components yourself.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Because of the heat factor I am limiting myself to the 6000lm LED.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Will be looking at the beam angle I get from these reflectors & available glass <u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">lenses, before making up a housing. Looking for a borosilicate lense<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">because of the heat transfer & low expansion.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I have taken a different route from Ken, but this process he started has<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">been very helpful & motivating, as has been the discussion & information<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">that has come out. <u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Alan<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><br clear="none"><br clear="none">Sent from my iPad<u></u><u></u></span></div></div></div><div><div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><br clear="none">On 1/09/2015, at 9:42 am, Alan <<a rel="nofollow" shape="rect" ymailto="mailto:alanlindsayjames@yahoo.com" target="_blank" href="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</a>> wrote:<u></u><u></u></span></div></div></div></div></div><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">I bought a 24-36V 6000 lm & 4000 lm LED array along with drivers, <u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">& have another lot in the post.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">The driv<br clear="none"><br clear="none">Sent from my iPad<u></u><u></u></span></div></div></div><div><div style="margin-bottom:12pt;"><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><br clear="none">On 1/09/2015, at 4:09 am, Cliff Redus via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<u></u><u></u></span></div></div></div><blockquote style="margin-top:5pt;margin-bottom:5pt;"><div><div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Ken is in Ireland on a holiday but before he left, he had finished the design of the LED Driver power stage. Still working on the housing but have been sidetracked the last month on getting my boat ready to dive after major upgraded over the last 18 months. Hope to get back on the Light housing shortly. I did dive the new 5K LED light this weekend and it worked great.<u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">Cliff<u></u><u></u></span></div></div></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> <u></u><u></u></span></div></div><div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;">On Mon, Aug 31, 2015 at 8:09 AM, Jon Wallace via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<u></u><u></u></span></div></div><blockquote style="border-width:medium medium medium 1pt;border-style:none none none solid;border-color:currentColor currentColor currentColor rgb(204,204,204);margin:5pt 0in 5pt 4.8pt;padding:0in 0in 0in 6pt;"><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"><br clear="none">What has happened with the light build?<br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><u></u><u></u></span></div></div></blockquote></div><div><div class="yiv3720663409MsoNormal" style="background:white;"><span style="color:black;"> 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