This is an example on how to use the 4 8x8 LED displays that are powered by a MAX7219 chip.
https://www.youtube.com/watch?v=6ddNJZNmS8U
Just copy and paste into the Arduino IDE and upload it to your Arduino. Make sure that you have set the pins correctly in the file!
Just change everything in between the quotes on line 33. Don't forget to remove doBinaryCount() and scrollFont() in the loop() function! Unless you want them there that is.
- Arduino Uno
- MAX7219 with 8x8 Dot Matrix LED Module (4 in 1)
- Wires and stuff