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Need help... Need to know what type of power supply I need for 54 high power leds? Answered

54 High power leds
6 pcb strips with 9 leds each
3.2v 700ma per led
Wired in series

6 Replies

user
steveastrouk (author)2011-03-03

These strips usually carry their own resistors in my experience. What are they rated for ? Usually 12V.

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rickharris (author)2011-03-03

http://led.linear1.org/led.wiz

Will tell you al lyou need to know and even work out the circuit for you.

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user
ARJOON (author)2011-03-02

connect them with a 180v power supply. don't forget the 3w resistors. better connect them in parallel.

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user
orksecurity (author)2011-03-02

How are the LEDs in each strip wired?

Parallel -- both within the strips and between them -- would seem to make more sense. In that configuration you'd need a 3.2V supply which could provide up to 54*700 ma, or about 38 amps.

Note that this comes out to a bit over 120 watts. Not all of that will come out as light; some of it is going to be heat. You'd better think about how you're cooking this beast if you don't want to cook the LEDs.

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user
orksecurity (author)orksecurity2011-03-02

Sorry, change "cooking" to "cooling". Though, as I say, if you aren't careful...

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user
7654321 (author)2011-03-02

Small gas powered generator?
What are you going to be using it for?

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