Hi. I am trying to build a scrolling LED matrix based on a MAX7219 common cathode LED matrix module, which I made myself from a kit. https://brainy-bits.com/tutorials/scroll-text-using-the-max7219-led-dot-matrix/ This is what im working from. I have triple checked, and everything is fine. I am only getting a few leds on at once. Here is one plugged in.
