An open-source cascadable 8×8 LED matrix module using Arduino and MAX7219 from Embedded Lab:
Easy Matrix is a cascadable 8×8 LED matrix module with the MAX7219 chip on board, which allows to control the display with only 3 I/O pins from microcontroller. Multiple Easy Matrix modules can be easily cascaded to make a bigger-size display through precisely aligned male and female headers on opposite sides of the display. It is compatible with Mark Ruys’ Max72xxPanel (Adafruit’s GFX library is also required) and MaxMatrix libraries for Arduino platform.
This project is available on Tindie.
Check out the video after the break.