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Whether this is actually a pushbutton momentary, but roughly same dimensions as toggle switch | | R21, R22, R23 | 3 | 100R | Resistor | | | | | | S3 | 1 | B20k | Potentiometer | | | | | | | R8, R10, R12 | 3 | 4.7k | Resistor | | | S2 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TSSOP-8/VSSOP-8 Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) Switch, triple pole double throw Precision Timers, 555 compatible, PDIP-8 0.2A Ic, 40V Vce, Small.

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