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Tilted D Momentary Switch, dual pole double throw | | | | C6, C7, C8, C9 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-14/SOIC-14 | | R25, R27, R29 | 3 | 22k | Resistor | | | | R3, R7 | 2 | 47k | Resistor | | | C2 | 1 | 10 nF | Unpolarized capacitor | | | | D3, D4.

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