The dual foot switch is a double switch, which uses the posivite halfwave for one and the negative halfwave of a sinus signal for the second channel.

Each channel inverts the incoming signal and amplifies it by factor 11 . They are both driving a BC337 transistor, which switches each a relay. The relays can handle 3A @ 230V and the pcb is also designed for that.

The PCB is a one sided PCB.

Status: prototyp builded, not yet tested