can't you just look at the back of the board?
There is a clear track going from one of the pins to the item labeled common on the spring switch.
That one is signal I think. I can check when home tonight.
Then two middle are ground, and other is + VCC.
There is a clear track going from one of the pins to the item labeled common on the spring switch.
That one is signal I think. I can check when home tonight.
Then two middle are ground, and other is + VCC.