i got this PCB on eBay, that allow to play 3 jamma PCB in one cab.
all the board are connected to relays.
only one board is power at a time, so no need to add extra power supply.
on that PCB you switch between games by using a mini remote control.
i post some pictures to see if somebody will like to try to duplicate it

maybe other members will be interested ?
for sure i will buy a few






