Peggy 2 is our second-generation light-emitting "pegboard" display: a quick, easy, powerful and efficient way to drive a lot of LEDs-- up to 625-- in a big matrix covering almost a square foot of area. Now shipping in its fourth revision, Peggy 2 is a field-proven Arduino-compatible open-source display, capable of complex animations and stand-alone operation. You can make an LED sign for your shop