I currently have an rpi3a and electrodragon active 3 channel board on top and they work fine, but I’m looking for anything smaller than that.
https://www.aliexpress.us/item/3256806177226619.html mentioned by @MaxMatrix is exciting, but it’s only 2 channel.
I’ll contact electrodragon to ask them if they can at least put the hub75 connectors under the board (between the board and rpi) to save a bit of height space, but otherwise I would love a custom board that plugs into the smaller rpi3 or better capable board that can do 3 channel output.
Did anyone end up making an output board for the compute module boards?
(I assume rpi0 and all such very small boards may not be fast enough to push 3 channels at 128x128 and full speed to get the max allowable refresh rate)
Right now, you can see my rpi3 tucked in there. Sadly it takes a good amount of space and the HUB75 connectors are on top of the board instead of under:
More build info: