Charlieplexed Arduino 8x8 LED Grid Display Shield Made and Simulated in 123D Circuits: edit: Wow, this won an awesome prize! Very many thanks guys! Charlieplexing (http://wealoneonearth.blogspot.nl/2013/03/design-note-charlieplexing-led-matrices.html) is a powerful method for driving a large number of LEDs from a relatively small amo…
