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Http://www.nkkswitches.com/pdf/gwillum.pdf switch single-pole double-throw spdt ON-ON D Push button switch, generic, symbol, four pins D Push button switch, generic, two pins | | ----- | --- | ---- | ----------- | ---- | ----------- | ---- | ---- | | | Q1, Q2, Q3 | 3 | 10uF | Polarized capacitor | | | | | | R25, R27, R29 | 3 | A1M | Potentiometer | | | R2, R5 | 1 | TL071 | Operational amplifier, DIP-8 | | | | | | C3, C4, C10 | 1 | B10k | Potentiometer | | J6, J10.

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