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Components I used, I found: \* The Dailywell 3PDT and SPDT toggle switch ON-ON Push button switch, generic, two pins Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling Audio Jack, 2 Poles (Mono / TS) Operational amplifier, DIP-8 Quad operational amplifier, DIP-14"/> Quad operational amplifier, DIP-14"/>