[Fjord Carver] brings together an RGB LED and CdS Photoresistor to make a color sensor ... This time around it’s an Arduino doing the measuring instead of a PIC. So why isn’t that sensor ...

The basic design for the RGB keypad came from [JMG]’s Arduino based ... blue fairly well. The color combination was hard on the eyes until we put the keypad over the LED to double check our ...

If you’d like to get more specific, Michael Klements’ Arduino-based scanner lets you ... along with a 16×2 panel. An optional RGB LED attempts to copy the shade of whatever object you ...