I am making an asteroids cabinet and i need 36 vAC and my question is, Can I Use an external transformer separate from main DC voltages? are both circuits sepparate or they need same "0"?
Yes, funnily enough I'm building a Asteroids test bench as I have two boards to test and have separate 2 x 18V AC drivers to power the video part of the board
I'm using one of these with a custom board I built myself - verified working with 2 x 18V AC output so one to the top and one to the bottom connector of the 36V AC on the board