Arduino: animations on an 8x8 LED matrix (MAX7219)
Drive an 8x8 LED matrix with a MAX7219 and Arduino. Build frame-based animations: a smiley, a wave, and a scrolling pixel text. One chip, three wires.
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#max7219
2 tutorials
ESP32: drive a MAX7219 8-digit 7-segment display
Wire a MAX7219 to an ESP32 to drive an 8-digit 7-segment display over SPI. The right pick for showing sensor numbers, counters, or clocks.