"I need to know the way the pedal is supposed to work which is not clear from this drawing. The connection to the rubber part that touches the contacts, if there is any connection to it, is not shown.
I'm assuming that one of the cable conductors is a power supply, and the other is a signal which represents the pedal pressure, either as a voltage or perhaps as a resistance. But this is not clear to me from the circuit diagram of the pedal."
- originally from Kris