I picked up three of these interesting full RGB display signs from a local government auction; and while I haven’t done a lot of picking apart just yet, it looks like it’s completely tied to proprietary software. The company that built it the internals appears to be an Australian company that’s no longer in business. It’s beautifully bright, all the LEDs seem to work, and it’s powered by a very impressive 40 amp 5 volt power supply.
All sorts of IO. Ethernet (no I haven’t hooked it up to the home network just yet), RS232 (there’s a 485 in/out not shown in this photo as well). Some custom peripheral port, and weirdly there’s an audio input that goes to the logic board, but it doesn’t contain any audio display; I’m guessing there’s some software based way of having it do sound triggered/modified displays.
There’s a main CPU board, that drives a secondary board, and then three identical LED driver boards. Anyway, this will be my next project, and if I don’t get anything else out of it other than a 1000 bright RGB LEDs and a 200W 5V power supply, I’m still ahead.