I’m trying to build a mini arcade cabinet using a Raspberry Pi 3 and RetroPie. I heard about the Picade kit and it looked really awesome, but I wanted a slightly larger screen so I bought a Picade PCB off Amazon last week. They only thing I received was the PCB, no instructions or additional parts. I’ve been trying to piece together how things go together from the Pimoroni tutorial, customer builds, and forum posts here. Can someone help me with some really basic questions?
I don’t see a way for the Picade PCB to mount on the Pi. I have some brass stand-offs I could use, but the photos in the Pimoroni tutorial don’t show anything like that. I was initially thinking there were some pins on the PCB that mated to the Pi, but that doesn’t appear to be the case.
Power. If I understand correctly, the Picade PCB is powered by the external power supply and not the Pi? So I hook the Picade to the Pi via a micro USB to USB A cable?
What does the 1/4 with the black circle around it on the terminal do? Should that be hooked up to a button?
I just got started putting all my buttons and wires together so I might have more questions as I go. I know once everything is wired up correctly, I’ll have to download some new code for the Pi to interface with the PCB correctly. I appreciate any help you can provide.