Ouch

LEDBE
H20doctor

H20doctor

Enlightened
Joined
Jan 16, 2008
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222
Location
seattle
well as a DIY builder of dive lights id thought i would share in a OOPS !!! I am building a 3 XPG light for a client and i got them from Kaidomain... I had hust thrown them on a heatsink and glued them down , and got them Sodierd up, not sure on the soder spell? any way I hooked them up with 10 volts useing a Buck driver at 1000ma, no problem nice and bright ... Then i put them away ... Today I was working on the heat sink some more and decided to light them up again... this time i used a battery pack and juiced them up direct with no DRIVER ... the pack was 8.4 volts, with 6 sub C 5000Ma batteries... thats 25000 Ma ... guess what ? sizzle city ...yep I fried them good ... wasted my 40.00 of XPG... the dies are off because i used a Heat torch to get the JB weld off the sink, and the LED's
So does anyone here want to share a story about frying there Light Modules

4316907405_96c5d9cfb4.jpg
 
H20doctor said:
well as a DIY builder of dive lights id thought i would share in a OOPS !!! I am building a 3 XPG light for a client and i got them from Kaidomain... I had hust thrown them on a heatsink and glued them down , and got them Sodierd up, not sure on the soder spell? any way I hooked them up with 10 volts useing a Buck driver at 1000ma, no problem nice and bright ... Then i put them away ... Today I was working on the heat sink some more and decided to light them up again... this time i used a battery pack and juiced them up direct with no DRIVER ... the pack was 8.4 volts, with 6 sub C 5000Ma batteries... thats 25000 Ma ... guess what ? sizzle city ...yep I fried them good ... wasted my 40.00 of XPG... the dies are off because i used a Heat torch to get the JB weld off the sink, and the LED's
So does anyone here want to share a story about frying there Light Modules

4316907405_96c5d9cfb4.jpg
Click to expand...


I'll top that and raise you 2... How about fried 3 Ostar Osram 27W in about 3 seconds!!! LOL! Fastest $150 spent so far...
Also, kept the solder gun on a Luminus SSt-90 too long and burned the solder pad off... There went $50...
 
I can build lights , but when it comes to Voltages and drive currents.. I need to take an electronics class ..
 
H20doctor said:
wasted my 40.00 of XPG... the dies are off because i used a Heat torch to get the JB weld off the sink, and the LED's
Click to expand...
JB weld there's your problem, you need to use a good thermal epoxy such as Arctic Alumina, as thin a layer as possible, AA the size of a match head would be enough for each of your LEDs. Your JB weld looks as if it was a little on the thick side too, double :oops: :oops:
Norm
Edit use alcohol swabs to clean up the excess for a really neat job.
 
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Well I use JB weld cause its strong ... I have had divers drop light heads to Pavement and had the Led's come off the Heatsinks ... Divers Love to abuse dive gear..
 
H20doctor said:
Well I use JB weld cause its strong ... I have had divers drop light heads to Pavement and had the Led's come off the Heatsinks ... Divers Love to abuse dive gear..
Click to expand...
Arctic Alumina is also a type of epoxy, it will bond very well and you won't be cooking LEDs.
Norm
 
Thanks Norm I will try some out ... I never have a Heat issue building lights, always abuse issues.. I fried a MCE chip awhile Back by over voltage also... Its amazing How small these led's are , and there so bright !!! But too much Juice ... And Poof
 
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