I'm working on a project using a cluster of 3x3Watt RGB LED's. I found this simple CCS http://www.instructables.com/id/Circuits-for-using-High-Power-LED-s/ to drive high watt LED's of single color and it works great, so I built a total of 3 to drive a 3watt RGB, now I want to connect 3 RGB's would I need to have 9 CCS or can I drive each color from 1 CCS? I read that when controlling current its best to connect in series but I can't with a common anode RGB.

Any ideas?

 

Can you post a schematic of the circuit that you used?
How much voltage do you have available?
How many volts and amps does a 3 watt LED use?

 

I don't see a way that you don't need 9 CCSs. Maybe RGB LEDs are not a good choice for your project.

 

This is the circuit
http://www.instructables.com/file/FTFKKU6Z2HEWIFNTP5

each led colour is 700ma and has a voltage drop of 2.0 - 3.5v depends on the colour
and the supply is 12v @ 20a

 

Put a few LEDs in series and use one regulator to supply as many as you can, as long as the voltage needed for the LEDs is less than 11.2 volts.

The drawing you posted looks just right.

 

#12, he's got 3 LEDs total, and each is an RGB with a common anode.

 

Ah...you mean the drawing does not account for the number of leads on each LED. Right?

Something like this except this circuit gives no control over individual brightness?