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Old 01-19-2014, 11:23 AM   #1
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Rapid Leds only light up when I touch heatsink...

Last night I finished wiring my leds. Its a biocube 8 kit. I was given the fixture with the kit in place. I replaced the potentiometer and rewired the leds. Now the leds only light up very little and its only when I touch the heatsink. The leds are lit up the whole time theyre plugged in, but supper dim. Then they get a little brighter when I touch the board. Ive read that it may be a short. Thoughts from anyone else....
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Old 01-19-2014, 11:28 AM   #2
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You definitely have a short somewhere, or a bad potentiometer. Kind of like christmas lights, you will have to go back and work each one over again to find the problem.
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Old 01-19-2014, 11:36 AM   #3
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Quote:
Originally Posted by fort384 View Post
You definitely have a short somewhere, or a bad potentiometer. Kind of like christmas lights, you will have to go back and work each one over again to find the problem.
Ok I will go back over each wire and solder point. There is 1 wire that I didnt change out. The pot is brand new. Just received it yesterday. All leds flash 1x when I power off. Ive heard this is normal...
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Old 01-19-2014, 11:38 AM   #4
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yes thats normal for some power supplies.
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Old 01-19-2014, 11:47 AM   #5
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Ok cool. Good to know.
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Old 01-19-2014, 08:38 PM   #6
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Got it. It was the positive and negative on the 10w ac adapter being switched
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Old 01-19-2014, 11:42 PM   #7
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That'll do it. A reallllly short short I suppose . Glad you got it.
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Old 01-19-2014, 11:49 PM   #8
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Thanks, the motivation is back. I need to out the fixture back together and mount it over my 40g breeder.
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Old 01-23-2014, 10:12 PM   #9
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check my diy led fixture.
led light fixture part 1 - YouTube
led aquarium light part 2 - YouTube

it has 60 dimmable led of 3w each
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