Small 1.2" 8x8 Bright Square Pure Green LED Matrix + Backpack SF_Memory Cards It features a 3

It features a 3

driven by GPIO48

* Upright Basic Unit with Insulating Disc

it now has a switch to select power source either from USB or external power

which makes it much more agile than competing robots like the Solarbotics Sumovore and Parallax SumoBotwhile still offering plenty of control

Small 1.2" 8x8 Bright Square Pure Green LED Matrix + Backpack SF_Memory Cards It features a 3What's better than a single LED? Lots of LEDs! Matrices like these are 'multiplexed' so to control 64 LEDs you need 16 pins. That's a lot of pins, and there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up and they take up a ton of space. Here at Adafruit we feel your pain! After all, wouldn't it be awesome if you could control a matrix without tons of wiring? That's where these lovely LED