Matrix & Sprite Libraries The Matrix library allows you to control a large number of LEDs, with easy-to-use (but expensive) MAX7219 chips. Sprite is used with Matrix, to draw shapes. Download: Matrix_Sprite.zip (updated for Arduino 1.0 & later) Matrix and Sprite have been tested with Teensy 2.0, Teensy++ 2.0 and Teensy 3.0. Hardware Requirements Matrix uses one or more MAX7219 chips, with a grid o