lolshield hacking

My friend Jimmie Rodgers, maker extraordinaire has come up with a great new shield for the Arduino which he is calling the LoLshield for “lots of leds”. It’s a charliplexed array of 126 LEDs in a 9×14 grid that pops right onto an arduino. Neat! A problem with charliplexing is brightness. Since you have to turn each led on and off only one at a time, you must cycle them very quickly and rely on persistance of vision to make it look like many are on at once.... Read More