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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>We will see,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Ken<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br><b>Sent:</b> Wednesday, September 30, 2015 1:29 AM<br><b>To:</b> Personal Submersibles General Discussion <personal_submersibles@psubs.org><br><b>Subject:</b> Re: [PSUBS-MAILIST] LED Light 10,000 Lumens<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Thanks Ken,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1443589664239_3021"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>you have a lot of parts to fit in there. <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1443589664239_3021"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Maybe you will need to stack the PCBs<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1443589664239_3021"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Good luck.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1443589664239_3021"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Alan<o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p><div id="yui_3_16_0_1_1443589664239_2945"><div id="yui_3_16_0_1_1443589664239_2944"><div id="yui_3_16_0_1_1443589664239_2943"><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'> Ken Martindale 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> Wednesday, September 30, 2015 9:16 AM<br><b>Subject:</b> [PSUBS-MAILIST] LED Light 10,000 Lumens</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1443589664239_2946"><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>If you go to the forums you can find the latest installment of the LED<br>driver schematics and parts list.<br><br>I found a few errors which I corrected and I changed the PWM IC to one I<br>have more confidence in.<br><br>I did not use a reverse polarity protect diode since I didn't want to throw<br>away the power in a diode so I used a FET as the reverse polarity protect<br>device. It cost about $0.80 more to do this.<br><br>The cost of the electrical parts is about $88 from Digikey including the<br>Varo 29 LED array. This is for a single unit and the parts cost goes down if<br>higher quantity. This does not include the PWB.<br><br>I have ordered the first kit of parts from Digikey today to help me in<br>laying out the PWB which is next. These parts will be used in the first<br>prototype. I should have an area study done by next week so we can start<br>firming up the mechanical packing and making it fit into the housing Cliff<br>has generated.<br><br>The design meets all but one of our original requirements as stated in the<br>spec we generated. Meeting the full EMI requirements of MIL-STD-461 would<br>require a large EMI Filter which in the interests of small size was modified<br>to accept a small EMI Filter, mostly common mode filtering. I think it will <br><br>have no problems in the Sub's electrical environment.<br><br>One of the things I'm interested in is to put the driver on a single<br>rectangular PWB so we could use the driver as a stand-alone driver internal<br>to the Sub so the LED array could be all that is packaged outside the<br><br>sub. It would require a 4 conductor cable to the LED array outside the sub.<br>That may be for the future, for now we are going with Cliff's housing. <br><br>Wish us luck,<br><br>Ken Martindale<br><br><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><o:p></o:p></span></p></div></div></div></div></div></body></html>