HackerHouse

That's a good idea. If you have hardware that needs to be controlled by an Arduino, you could also probably send image data from a Pi connected through serial.

Go for it. Just be wary that the program memory space on an Arduino is really small, so a high resolution image won't fit. I would stick to vector drawings with an Arduino.

We're slicing them up into sections. You can specify your own picture with the code we wrote.

The lag is mainly caused by your network latency since most of the components are simply service calls.

We choose 73ch

Yep, just plug the wires into any open gpio pins and add an entry in the retrogame.c file. You can also connect the ground wires together if there aren't enough ground pins.