[PSUBS-MAILIST] LED Driver

Sat Sep 5 07:02:28 EDT 2015

Update on my LED driver.Had my 60W LED running for 20 hours & upon recheckingthe amps I found I was only drawing .28 amps not 2.8 amps as I had first thoughtso no wonder it was running cool. The output of the light seemed quite highso it had me fooled. I was only running it at 7.28W.I wound it up to 1 amp  (27W)  & it got really hot quite quickly.The driver seemed to revert to .5 of an amp when I tested it again & I couldn'tget any more than that on that driver or the spare one I had.I have a beefyer driver that I'll try in the near future.A thought that came to mind was that it may be an advantage using Ken's100W emitter and operating it at something like 50W so it's running a lot cooler.Another thought is that if there is a potentiometer in Ken's design for adjustingthe amps, then for those that want to put the driver in the hull, this could be usedas a dimming control.Cheers Alan
      From: Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org>
 To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
 Sent: Thursday, September 3, 2015 10:17 AM
 Subject: Re: [PSUBS-MAILIST] LED Driver

#yiv6395798372 #yiv6395798372 -- _filtered #yiv6395798372 {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;} _filtered #yiv6395798372 {panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv6395798372 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} _filtered #yiv6395798372 {font-family:Georgia;panose-1:2 4 5 2 5 4 5 2 3 3;}#yiv6395798372 #yiv6395798372 p.yiv6395798372MsoNormal, #yiv6395798372 li.yiv6395798372MsoNormal, #yiv6395798372 div.yiv6395798372MsoNormal {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;}#yiv6395798372 a:link, #yiv6395798372 span.yiv6395798372MsoHyperlink {color:blue;text-decoration:underline;}#yiv6395798372 a:visited, #yiv6395798372 span.yiv6395798372MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv6395798372 span.yiv6395798372link-enhancr-element {}#yiv6395798372 span.yiv6395798372link-enhancr-view-on-domain {}#yiv6395798372 p.yiv6395798372msonormal, #yiv6395798372 li.yiv6395798372msonormal, #yiv6395798372 div.yiv6395798372msonormal {margin-right:0in;margin-left:0in;font-size:12.0pt;}#yiv6395798372 p.yiv6395798372msochpdefault, #yiv6395798372 li.yiv6395798372msochpdefault, #yiv6395798372 div.yiv6395798372msochpdefault {margin-right:0in;margin-left:0in;font-size:12.0pt;}#yiv6395798372 span.yiv6395798372msohyperlink {}#yiv6395798372 span.yiv6395798372msohyperlinkfollowed {}#yiv6395798372 span.yiv6395798372emailstyle19 {}#yiv6395798372 p.yiv6395798372msonormal1, #yiv6395798372 li.yiv6395798372msonormal1, #yiv6395798372 div.yiv6395798372msonormal1 {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;}#yiv6395798372 span.yiv6395798372msohyperlink1 {color:blue;text-decoration:underline;}#yiv6395798372 span.yiv6395798372msohyperlinkfollowed1 {color:purple;text-decoration:underline;}#yiv6395798372 span.yiv6395798372emailstyle191 {color:#1F497D;}#yiv6395798372 p.yiv6395798372msochpdefault1, #yiv6395798372 li.yiv6395798372msochpdefault1, #yiv6395798372 div.yiv6395798372msochpdefault1 {margin-right:0in;margin-left:0in;font-size:10.0pt;}#yiv6395798372 span.yiv6395798372link-enhancr-element {}#yiv6395798372 span.yiv6395798372link-enhancr-view-on-domain {}#yiv6395798372 span.yiv6395798372EmailStyle31 {color:#1F497D;}#yiv6395798372 .yiv6395798372MsoChpDefault {font-size:10.0pt;} _filtered #yiv6395798372 {margin:1.0in 1.0in 1.0in 1.0in;}#yiv6395798372 div.yiv6395798372WordSection1 {}#yiv6395798372 You are right, there wasn’t much information and I found it confusing.  Hope your 60 watt works OK. If their statement about step down is correct then your LED run voltage has to be less than your input voltage.  The circuit contains an aluminum electrolytic capacitor which makes me question the reliability. But sometimes it still works.  Have fun,  Ken  

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
Sent: Wednesday, September 02, 2015 5:36 PM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] LED Driver  Ken,that site didn't have a lot of information.This documentation on Ebay desribes them as constant voltage, constant current driverssuitable for high power LEDs. LED Power Driver Constant Voltage Current Adjust CC CV  
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| LED Power Driver Constant Voltage Current Adjust CC CVUS $11.00 New in Business & Industrial, Electrical & Test Equipment, Test Equipment |
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It does say to heat sink it if running more than 25W. Heatsink version available on his site. When I mentioned the price to my LED friend yesterdayhe was a bit dubious & suggested I might get what I payed for.You have prompted me to do a bit more experimentation; so have it running at the momentdriving a 60W LED & will see how long it runs for.Hope you enjoyed the trip to Ireland.Alan  From: Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org>
To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
Sent: Thursday, September 3, 2015 8:39 AM
Subject: Re: [PSUBS-MAILIST] LED Driver  I looked at this chip and it’s primarily a buck voltage regulator not intended for use as a constant current LED driver. You can try using it but I’m not optimistic about them. Let me know if it works. Ken Martindale   From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
Sent: Tuesday, August 18, 2015 8:02 AM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: [PSUBS-MAILIST] LED Driver Bought this LED driver & a 4000 & 6000 lumen emitter.It may be helpful with regard to our open source light.This one describes itself as having a wattage output limitation, beyond which cooling is required. This may be just a heat sink butI'm not sure. There are other higher powered constant voltage, constantcurrent drivers on site. There was no description of how it worked with the product, but managed tofind one on the site posted at the bottom. The blue trim-pot on the leftincreases voltage by a clockwise turning & the right trim-pot increases current.AlanLED Power Driver Constant Voltage / Current Adjustable Module - Blue + Black
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| LED Power Driver Constant Voltage / Current Adjustable...I like this from DX. Find the cool gadgets at a incredibly low price with worldwide free shipping here. |
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  1~35V DC 25W Power LED Driver Supply LM2596 CC CV Light [Constant Voltage Current_A] - $15.00 : Zen Cart!, The Art of E-commerce
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