The MAX7219 4-in-1 dot matrix display module is a red LED matrix board for showing scrolling text, numbers, symbols, and simple graphics in compact electronics projects. Built around the MAX7219 and controlled over an SPI interface, it makes it easy to add bright visual output to Arduino, ESP32, and other microcontroller builds without us
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Bright and easy to use
Nice clear display and worked well for my Arduino project. Good value for the price.