Dot Matrix Module Red LED 4 In Line 8×8 Display MAX7219 with 5-Way 20cm Cable Arduino Compatible | Lahore
This module is made up of 4 matrices each of 8 by 8 LEDs. Each 8 x 8 matrix has its own MAX7219 driver, creating an 8 x 32 LED dot matrix display. The Arduino communicates using serial data, needing just 3 I/O to drive the whole display.