Here’s something I whipped up Friday: a tasty duo of home-cooked, hand soldered RGB-LED shields. They fit onto the Freakduino boards but also Arduino and can produce light in all colors. The shields will be covered by a semitransparent material so the light output will be even.
Not the most complicated circuit🙂 but I needed them to replace state of the art LCD screen shields, that unfortunately used pins that the board also used. Fingers crossed it will work this time.
If you want to make this yourself, here is some info on the circuit.