<div dir="ltr"><div>Hello all; </div><div>what about removing all electronics from each lamp, keeping a simple cavity with just the led array; connector; and lens? </div><div>The back face from where the led array would be glued would sit in water for efficient heat dissipation.</div><div><br></div><div>Then the electronics would be enclosed in a separate 1atm casing; with less of heat management constraints, </div><div>from that extra box; you can have as many outlets as lights on your boat (say 3 to 4 typically), and one inlet only from the hull (safer) with sufficient number of pins to control lighting modes; dimming and what not in a preprogrammed switching sequence.</div><div><br></div><div>this option simplifies lights designs, makes electronics a bit more complicated but merges it in one pcb but increases number of connectors; but if you go for blue globes between central electronics box to the light pods it is not an issue. </div><div>However; I know nothing in electronics; so I don t know what sort of cable length we could have between electronics and led without loosing nice control of led voltage?</div><div><br></div><div>regards</div><div>Antoine</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Jul 27, 2015 at 9:53 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:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><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>David,</span></div><div dir="ltr"><span>do you have some sort of thermostat in the driver or are you that makes it blink.</span></div><div dir="ltr"><span>or are you simply using resistors? </span></div><div dir="ltr"><span>Here is the link to the Newtsun, it doesn't say in the specs that it is oil filled</span></div><div dir="ltr"><span>but I remember being told that & it's design indicates that.</span></div><div dir="ltr"><span><a href="http://nuytco.com/products/newtsun-100/" target="_blank">http://nuytco.com/products/newtsun-100/</a><br></span></div><div dir="ltr">Alan</div><br> <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"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold">From:</span></b> David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><span><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> </span><b><span style="font-weight:bold">Sent:</span></b> Tuesday, July 28, 2015 7:33 AM<div><div class="h5"><br> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] LED Lights<br> </div></div></font> </div><div><div class="h5"> <div><br><div><div><div dir="ltr">Hi Alan, one thing that I have observed so far is that without a heat sink, the led will heat up in about 15 seconds and then start to flash on and off. </div>
<br clear="none"><div><div><br><br></div><div><div dir="ltr">On Mon, Jul 27, 2015, 12:29 PM Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></div><blockquote 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>Hi David,</span></div><div dir="ltr"><span>you can get really simple with these LEDs & run the emitter straight from</span></div><div dir="ltr"><span>the power source. The light intensity fluctuates with the heat, but with the</span></div><div dir="ltr"><span>light intensity we are talking about, it might not be noticable. The trick would</span></div><div dir="ltr"><span>be picking a voltage low enough so that it didn't get too bright & burn out the </span></div><div dir="ltr"><span>emitter when it </span>warmed up. </div><div dir="ltr"><span>Next step up in simplicity is to just stick a resistor in series, & there are</span></div><div dir="ltr"><span>calculators for this on line. I am wondering if a thermister instead of a resister</span></div><div dir="ltr"><span>would be a good idea, as this would restrict the current as the unit heated up.</span></div><div dir="ltr"><span>It may be a good option for running out of water if the thermister values were right.</span></div><div dir="ltr"><span>The beauty of this system would be that you would only have 2 components</span></div><div dir="ltr"><span>that you could damage by heating. The down side is a reduction in efficiency</span></div><div dir="ltr"><span>over a buck driver type system.</span></div><div dir="ltr"><span>Cheers Alan</span></div><br clear="none"> <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"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold">From:</span></b> Seaquestor via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect">personal_submersibles@psubs.org</a>></font></div></div></div></div></div><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 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"><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">personal_submersibles@psubs.org</a>> <br clear="none"> </font></div></div></div></div></div><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 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"><b><span style="font-weight:bold">Sent:</span></b> Tuesday, July 28, 2015 3:10 AM</font></div></div></div></div></div><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 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"><br clear="none"> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] LED Lights<br clear="none"> </font></div></div></div></div></div><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 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><br clear="none"><div><div>
<div>Hi Cliff, maybe Phil could chime in on his led he demonstrated at his shop for use on the deep workers. It had only a flexible membrane over the oil compensated led housing. I think his design is about as compact as you can get, and I recall it had now fins, but run a voltage up to around 200+ volts. Seems to me that simpler the better, is the idea here. For me I will testing my design hopefully next week. with 4 leds, wired for high and low. Based upon alum cost, machining, leds and subconscious connector I'm coming in around $500 for each light. Cost may drop with multiple units. But one off is always more expensive.</div><div><br clear="none"></div><div>Best Regards,</div><div>David Colombo</div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div><div style="color:rgb(87,87,87);font-size:85%">Sent from my Verizon Wireless 4G LTE smartphone</div></div><br clear="none"><br clear="none">-------- Original message --------<br clear="none">From: Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect">personal_submersibles@psubs.org</a>> <br clear="none">Date: 2015/07/26 1:28 PM (GMT-08:00) <br clear="none">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect">personal_submersibles@psubs.org</a>> <br clear="none">Subject: Re: [PSUBS-MAILIST] LED Lights <br clear="none"><br clear="none"><div><br clear="none"><br clear="none"></div><div><div dir="ltr"><div>For anyone that has a large LED or halogens on their boat, can you share your experience on narrow beam vs flood lights. Building a LED housing to be low profile to fit in a FRP recess is going to be difficult with a reflector to get a narrow beam. As an example, a typical reflector size for a Vero 29 is 110mm (4.33") diameter and 67mm (2.64") deep. This is massive and you still need housing and heat sink fins.</div><div><br clear="none"></div><div>I am wonder if we really need a focused light or is a flood light adequate?</div><div><br clear="none"></div><div>Cliff</div></div></div>
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