a moment of silence for the original microcontroller. It was missing on arrival, presumably because the original hackers didn't want anyone else wasting time (or getting hurt) trying to fix a sign that was far too broken. Or maybe it also got wet and fried? Or its sitting in a roof screwed to a headboard somewhere?
The original *massive* 50A power supply was overkill, and came in an open-air frame. A potentially dangerous situation since this already broke once from water damage...
Below is the power panel after :). These PSU (power supply unit)s are the the beefiest 5V enclosed ones that I could find (15A).
I designed and 3D printed custom screw supports for them. I also added voltmeter displays for each PSU (I had some red and some blue so that's why they're different colors), and then I installed my custom PCB with the microcontroller and level shifter IC (74HC245). It's upgraded with fuse protection, reset button, and other minor tweaks. I also installed my nice 3D printed strain reliefs. I went ahead and cut some new plywood to size for the whole
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