MAX7219array_ReadMe.py: Documentation file consisting largely of comments also included in the other files See this file for more details Installation of spidev module required to use this library: ...

Not even close. This is a project of [Jon’s] from over a year ago, and it is a very impressive 128×32 LED display board, driven using a single Raspberry Pi. It’s made of eight “P10” 32× ...

Some work with Arduino Nanos and a Raspberry Pi later, and he had a very acceptable LED matrix table ... circuitry he used to drive the whole array from more Arduinos and a GPIO expander.

but found that sending it the output from GPIO pin 18 at 3.3V worked fine, just seemed to be lower brightness. I used a capacitor to ease the startup/shutdown of the LED array, as recommended by ...

Raspberry Pi 5: Check LED status (red and green) for booting issues. Fatal firmware error (4 slow flashes, 5 fast flashes) ...