This is awesome!
Its also something I've been thinking of doing since i work at a pc repair/recycling place and have TONS of power adapters..
Can you explain how you wired in the fan controller to dim the LEDs?
Let me know if u dont know how to jump start an ATX PSU.
Its fairly easy by crossing the green wire with a black ground wire, and u can make that ATX PSU work via switch on the rear.
Basically a fan controller handles voltage. They are basically pots.. or rheostats which limit voltage.
You need to make sure first off the fan controller can supply the amps per channel. The Sunbeam is a great controller for the price.
Now a fan has 3 headers on it.
Black Red, and Yellow.
The black is the -, the red +, and the yellow is an RPM sense header.
You can buy fan headers at any PC accessory store, or fan header extenders and just splice the ends together.
Then plug the new fan header into the fan controller, and use it as a dial.
If you want pictures i can take some and show you.
Just note, if your going to use something higher then a 10W LED, like a 20W LED, it wont work unless its 12V.
PC's just happen to follow cars in the 12V rule, so PC accessories will work with 12V LED's.
Or you can just serial wireup 4 3W Led's so they = 12V, and control all 4 via 1 dial.
The sunbeam controller $14.00 :
1. Power : 20 watt per channel
2. Input voltage : DC 12V
3. Output voltage: 0 ~ 12 V
4. Output current: up to 1.67 A
5. Dim: 148.5x 105x 42 mm
6. Weight( Net) : 184
Can handle up to 1.67A / channel, which means easily a 10W x 2 Led on 1 port as long as they dont draw more then 800mA each.
The ones im using can draw up to 1amp @ 12V ~ 12W LED and not really a 10W LED...
i should tie them to my multimeter and find out if the spec's are true or not :\
3 x 10W LED's :O my fish are gonna need sun glasses
how its wired:
and all 3 dim'd.