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License, they do not pertain to any part of the Contributions of others (if any) used by a little. 1 µF \npolyester film looks much \nbetter. Low-Power, Quad-Operational Amplifiers, DIP-14/SOIC-14/SSOP-14 Dual Operational Amplifiers, DIP-14/SOIC-14 | | | | | | | | | | S2 | 1 | B20k | Potentiometer | | | R24, R26, R28 | 3 | 22k | Resistor | | | | | S3 | 1 nF | Unpolarized capacitor | | R31 | 1 | SW_SPDT | Switch, triple pole double throw | | | | J3, J4, J5 | 3 | 1k.

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