Victoss link said:For $40 (including the Arduino) I made a simple controller for my nano's LEDs using an Arduino Uno with a shield on top. Then it uses a few parts for the clock and a few transistors for the PWM. BUT... you need 0-10V so something like this could still be done but you would need digital POTs which I have not looked into. It does take a little know how and effort so the cost may not be worth it but for people who have Arduinos it could be a fun project and I could always help with the code if needed.
Top side with the shield (white) on top of the Arduino:
(btw this is basically all the parts to it besides the Arduino. There's a transistor and resistor for every channel (3) then a battery, 8 pin chip, cap and crystal for the clock.)
that's really cool and for the less electronically inclined you can get this same setup pre built in a nice little case for 60$ or 75$ with a wireless remote.
http://www.rapidled.com/ddc-01-pwm-controller/
http://www.rapidled.com/ddc-01-pwm-controller-w-remote-control/