The matrix that we’re planning to use during this project may be an 8×8 matrix which implies that it’s eight columns and eight rows, therefore it contains a complete of sixty-four LEDs. The MAX7219 chip makes it easier to regulate the matrix by victimization simply three digital pins of the Arduino board.

Parts Required

For this guide you’ll need the following parts:

Arduino Code

Here’s a simple sketch that displays three types of faces: a sad face, a neutral face, and a happy face. Upload the following code to your board:

View code on GitHub

Schematics Circuit