CatoDrop-in replacement for an LED display controller :3 I have 5 of those displays. Funnily enough, those were the first passenger information displays I ever owned, I got 4 of them after writing to transport operators all across Germany, and one recently from a friend. Back then, I designed a replacement controller with a simple Arduino Nano, which was my first custom PCB ever. That was around 10 years ago. About time to refresh those displays with something more modern!
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