<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_1464644504918_4031"><span id="yui_3_16_0_ym19_1_1464644504918_4030">Perhaps I could go with this motor driver, & set the voltage down to 36V.</span></div><div id="yui_3_16_0_ym19_1_1464644504918_4033" dir="ltr"><span id="yui_3_16_0_ym19_1_1464644504918_4043"><a class="enhancr2_8c8c2fef-b650-a68d-a6fa-41ddcc318bac" id="yui_3_16_0_ym19_1_1464644504918_4042" href="http://www.dx.com/p/jtron-pwm-dc-motor-speed-controller-green-15a-6-90v-290621#.V0y6EpF96Uk">Jtron PWM DC Motor Speed Controller - Green (15A / 6~90V)</a></span></div><div id="yui_3_16_0_ym19_1_1464644504918_4089"><br></div><div class="yahoo-link-enhancr-card ymail-preserve-class ymail-preserve-style" id="enhancr2_8c8c2fef-b650-a68d-a6fa-41ddcc318bac" style='font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; 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height: 185px; min-height: 185px;"> <tbody id="yui_3_16_0_ym19_1_1464644504918_4051"><tr id="yui_3_16_0_ym19_1_1464644504918_4050"> <td class="card-richInfo2" id="yui_3_16_0_ym19_1_1464644504918_4049" style="padding: 15px 0px 0px 15px; text-align: left; vertical-align: top;"> <span id="yui_3_16_0_ym19_1_1464644504918_4048" style="color: rgb(255, 255, 255); font-size: 18px; font-weight: bold;"> $ 6.80 </span> </td> <td class="card-actions" id="yui_3_16_0_ym19_1_1464644504918_4138" style="padding: 15px 15px 0px 0px; text-align: right; vertical-align: top;"> <div class="card-share-container"></div> </td> </tr> </tbody></table> <!--[if gte mso 9]></v:textbox></v:rect><![endif]--> </td> </tr> </tbody></table> </td> </tr> <tr id="yui_3_16_0_ym19_1_1464644504918_4074"> <td id="yui_3_16_0_ym19_1_1464644504918_4073"> <table align="center" class="card-info yahoo-ignore-table" id="yui_3_16_0_ym19_1_1464644504918_4072" 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); border-image: none; width: 95%; margin-top: -40px; margin-right: auto; margin-left: auto; position: relative; z-index: 2; max-width: 380px;" border="0" cellspacing="0" cellpadding="0"> <tbody id="yui_3_16_0_ym19_1_1464644504918_4071"><tr id="yui_3_16_0_ym19_1_1464644504918_4070"> <td style="padding: 16px 0px 16px 12px; vertical-align: top; background-color: rgb(255, 255, 255);"> </td> <td id="yui_3_16_0_ym19_1_1464644504918_4069" 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;'>Jtron PWM DC Motor Speed Controller - Green (15A / 6~90V)</h2> <div class="card-description" id="yui_3_16_0_ym19_1_1464644504918_4068" 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 id="yui_3_16_0_ym19_1_1464644504918_4109" style="padding: 16px 12px 16px 0px; text-align: right;"> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </a></div><div id="yui_3_16_0_ym19_1_1464644504918_4066"><br></div><div id="yui_3_16_0_ym19_1_1464644504918_4032"><span id="yui_3_16_0_ym19_1_1464644504918_4067">Then use this constant current driver (75W max)</span></div><div id="yui_3_16_0_ym19_1_1464644504918_4123" dir="ltr"><span id="yui_3_16_0_ym19_1_1464644504918_4126"><a class="enhancr2_c185191e-6133-7b66-bd4a-564a5d8179d9" id="yui_3_16_0_ym19_1_1464644504918_4125" href="http://www.dx.com/p/5a-constant-current-led-driver-module-battery-charger-red-433947#.V0y7dpF96Uk">Constant Voltage Constant Current DC-DC Power Module for Arduino</a></span></div><div id="yui_3_16_0_ym19_1_1464644504918_4179"><br></div><div class="yahoo-link-enhancr-card ymail-preserve-class ymail-preserve-style" id="enhancr2_c185191e-6133-7b66-bd4a-564a5d8179d9" style='font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; max-width: 400px;' dir="ltr" contenteditable="false" data-size="medium" data-type="yenhancr" data-category="product" data-embed-url="" data-url="http://www.dx.com/p/5a-constant-current-led-driver-module-battery-charger-red-433947#.V0y7dpF96Uk"> <a class="yahoo-enhancr-cardlink" id="yui_3_16_0_ym19_1_1464644504918_4152" 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#.V0y7dpF96Uk" target="_blank" rel="noreferrer"> <table class="card-wrapper yahoo-ignore-table" id="yui_3_16_0_ym19_1_1464644504918_4151" style="max-width: 400px;" border="0" cellspacing="0" cellpadding="0"> <tbody id="yui_3_16_0_ym19_1_1464644504918_4150"><tr id="yui_3_16_0_ym19_1_1464644504918_4149"> <td width="400" id="yui_3_16_0_ym19_1_1464644504918_4148"> <table width="100%" class="card yahoo-ignore-table" id="yui_3_16_0_ym19_1_1464644504918_4147" style="max-width: 400px;" border="0" cellspacing="0" cellpadding="0"> <tbody id="yui_3_16_0_ym19_1_1464644504918_4146"><tr> <td class="card-primary-image-cell" 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://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; position: relative;' bgcolor="#000000"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:0;left:0;"><v:fill type="frame" color="#000000" src="https://s.yimg.com/vv//api/res/1.2/3Gy3q6fb5RPODVCmFJEp0w--/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MjAwO3c9NDAw/http://img.dxcdn.com/productimages/sku_433947_1.jpg.cf.jpg"/></v:rect><![endif]--> <table class="yahoo-ignore-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://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png") left top; height: 200px;' bgcolor="transparent"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:-18px;left:0;"><v:fill type="pattern" color="#000000" src="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png"/><v:textbox inset="0,0,20px,0"><![endif]--> <table height="185" class="yahoo-ignore-table" style="width: 100%; height: 185px; min-height: 185px;"> <tbody><tr> <td class="card-richInfo2" 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;"> $ 4.71 </span> </td> <td class="card-actions" style="padding: 15px 15px 0px 0px; text-align: right; vertical-align: top;"> <div class="card-share-container"></div> </td> </tr> </tbody></table> <!--[if gte mso 9]></v:textbox></v:rect><![endif]--> </td> </tr> </tbody></table> </td> </tr> <tr id="yui_3_16_0_ym19_1_1464644504918_4145"> <td id="yui_3_16_0_ym19_1_1464644504918_4144"> <table align="center" class="card-info yahoo-ignore-table" id="yui_3_16_0_ym19_1_1464644504918_4143" 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); border-image: none; width: 95%; margin-top: -40px; margin-right: auto; margin-left: auto; position: relative; z-index: 2; max-width: 380px;" border="0" cellspacing="0" cellpadding="0"> <tbody id="yui_3_16_0_ym19_1_1464644504918_4142"><tr id="yui_3_16_0_ym19_1_1464644504918_4141"> <td style="padding: 16px 0px 16px 12px; vertical-align: top; background-color: rgb(255, 255, 255);"> </td> <td id="yui_3_16_0_ym19_1_1464644504918_4140" style="padding: 16px 12px; width: 99%; vertical-align: middle;"> <h2 class="card-title" id="yui_3_16_0_ym19_1_1464644504918_4139" 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 class="card-description" 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 id="yui_3_16_0_ym19_1_1464644504918_4178">I could have 2 constant current modules running off the motor speed controller,</div><div id="yui_3_16_0_ym19_1_1464644504918_4199" dir="ltr">so a total of $16:22 to run two 50W LEDs.</div><div id="yui_3_16_0_ym19_1_1464644504918_4206" dir="ltr"> What I am not sure of is whether the input capacitors on the constant current</div><div id="yui_3_16_0_ym19_1_1464644504918_4231" dir="ltr">drivers would be killed eventually by the PWM (16KHz). Or whether I can wire a different</div><div id="yui_3_16_0_ym19_1_1464644504918_4286" dir="ltr">capacitor between the two units to avoid this.</div><div id="yui_3_16_0_ym19_1_1464644504918_4262" dir="ltr">Are you listening in Ken?</div><div id="yui_3_16_0_ym19_1_1464644504918_4261" dir="ltr">Cheers Alan<br></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1464644504918_4006"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1464644504918_4172" style="display: block;"> <div id="yui_3_16_0_ym19_1_1464644504918_4171" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1464644504918_4170" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1464644504918_4169" dir="ltr"> <font id="yui_3_16_0_ym19_1_1464644504918_4232" face="Arial" size="2"> <hr size="1"> <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> Tuesday, May 31, 2016 6:10 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Constant current LED driver<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1464644504918_4285"><br><div id="yiv8175031579"><div><div dir="ltr"><div>Alan, this link says that they have the driver in stock.</div><div><br clear="none"></div><div><a href="http://dx.affmania.com/en/id-151115/zxy6005-26-dc-dc-60v-constant-voltage-current-regulated-power-supply-module-green#.V0yByMb2ZD8" target="_blank" rel="nofollow" shape="rect">http://dx.affmania.com/en/id-151115/zxy6005-26-dc-dc-60v-constant-voltage-current-regulated-power-supply-module-green#.V0yByMb2ZD8</a></div></div><div class="yiv8175031579gmail_extra"><br clear="none"><div class="yiv8175031579gmail_quote">On Sun, May 29, 2016 at 5:26 AM, 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="yiv8175031579gmail_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 class="yiv8175031579yqt7271939743" id="yiv8175031579yqt77835"><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> In case any one has come across one, </div><div>I am looking for a DC/DC step down (buck driver) module with constant current adjustment.</div><div>I need to drop the voltage from 50V input to 32-36 to drive my LEDs.</div><div>There is this module...</div><div dir="ltr"><a href="http://www.dx.com/p/zxy6005-2-6-dc-dc-60v-constant-voltage-current-regulated-power-supply-module-green-151115#.V0qbnpF96Uk" target="_blank" rel="nofollow" shape="rect">ZXY6005 2.6" DC~DC 60V Constant Voltage Current Regulated Power Supply Module - Green</a></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/zxy6005-2-6-dc-dc-60v-constant-voltage-current-regulated-power-supply-module-green-151115#.V0qbnpF96Uk" 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%; height: 185px; 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;"> $ 46.19 </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;">ZXY6005 2.6" DC~DC 60V Constant Voltage Current Regulated Power Supply...</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 dir="ltr">it will do what I want, but is a bit big & expensive. One option is to buy a couple of these &</div><div dir="ltr">just use the voltage step down function & run a number of smaller constant current drivers off it.</div><div dir="ltr">For anyone running 36V, there are a heap of cheap constant current drivers & LEDs in that</div><div dir="ltr">range to make up cheap & powerful lights.</div><span class="yiv8175031579HOEnZb"><font color="#888888"></font></span><div dir="ltr">Alan<br clear="none"></div></div></div></div><br clear="none">_______________________________________________<br clear="none">
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