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Num="2" name="-" type="input"/> Audio Jack, 2 Poles (Mono / TS)"/> Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | S3 | 1 | Conn_01x07 | *(optional) SIP socket, 2.54 mm, 1x7 Pin socket, 2.54 mm, 1x4 Pin header, 2.54 mm, 1x2 (see build notes | C7, C11 | 3 | 4.7k | Resistor | | J4 | 1 | SW_SPDT | Switch, triple pole double throw, separate symbols | | | | U3 | 1 | SW_Push | Push button switch, generic, separate symbols, four pins D Push button switch, normally closed, generic, four pins D Momentary Switch, single pole double throw Precision Timers, 555 compatible, PDIP-8 | | | R30 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | | U1 | 1.

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