When we are talking about the MAX7219-based dot matrix display module, it consists of 64 LEDs connected in a row-column format so that we could easily control them with the multiplexing technique.

# Digit 8 is the left most digit, digit 1 is the far right digit A simple library for driving the cheap 8 digit 7 segments LED boards found on eBay. With these boards the first digit is on the far ...

// make an instance of MAX7219_Digit called My_Display and set CS pin ...

The MAX7221 is a compact, serial input/output common-cathode display driver that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 ...