Hi Sergio,

Goto www.parallax.com and look for Sensors then at the bottom of that page there is Color and Light. They have the TCS230 Color Sensor Evaluation Kit for $79.00. Since the programs they offer are based on their product the Basic Stamp, they are also PIC compatible through PBP. There is also an application article from Nuts & Volts magazine available at that site also.

TAOS, the actual manufacturer of the Kit also makes RGB sensors that can be configured to detect colors. There has been a schematic published in Nuts and Volts magazine that shows how to get logic outputs for different colors using standard CMOS 4000 series logic gates. Not complicated stuff at all.

Have a nice day!

BobK