Quote Originally Posted by Weezard
That's what I ended up doing on one of the arrays.
Used dropping resistors.

The laptop supplies are excellent and can mount piggyback on the 'sink.
Hope ya no mind if a watch.

Aloha,
Weeze

Just don't use HP laptop power supplies, they get way too hot.

Even this 65w power supply next to my DV7 is keeping my sake VERY warm.
khyberkitsune Reviewed by khyberkitsune on . Calling out to Weezard for LED advice My friend, I've read your stuff here and at Steve F.'s site. I want to build a dedicated flowering lamp using Ledengin 15 watters. (4 reds, 1 blue, and possibly 1 warm white; LM 317's so I can tweak the ratios.) Essentially, a copy of your 4+1 cake pan lamp but built on a 4 x 18" finned heatsink so I can see what's going on under it.) If I were to post my picks for power supply, resistor ratings / values, etc., would you critique and perhaps offer some guidance? I have already purchased Rating: 5