Quoted from winteriscoming:I may just go ahead and order some and experiment, but wondered if anyone knew for sure if it could work or maybe if someone has a better way of reading switches from the game's matrix with a separate circuit.
Go for it!
Reading one switch isn't too bad, you don't have to use an opto isolator, but that would work to isolate the circuit. A debounce would probably do the trick to read an accurate switch hit.
The problem comes when you are reading ALL the switches on the switch matrix accurately. I haven't solved that one yet either... yet.
-Wes