This tutorial shows you how to create a project where a color sensor reads the color of a colored card, and then sets the RGB LED to that color. This is done with an arduino microcontroller. The system works well for a wide variety of colors, not just the primary colors. More details see arduino lesson #15 at www.toptechboy.com
I am Paul McWhorter from toptechboy.com and I will be putting together a series of tutorials on use of the Arduino microcontroller.