Home › Forums › Products › Stompboxes › Aux Switch how-to question? › Reply To: Aux Switch how-to question? August 1, 2014 at 5:13 pm #126417 nickroseModeratorEventide Staff I would suggest you just buy a Digitech FS300 (or look for the schematic online). You need two SPST and one either one DPST or another SPST and two diodes.
