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Hardware/PCB/precadsr/fp-lib-table | 1 | TL074 | Quad operational amplifier, DIP-14 | | R1, R2, R23, R24 R3, R21, R27, R28 | 3 | 100R | Resistor | | C1, C11 | 2 | 10k | Resistor | | | | | | | 1 | 10nF | Ceramic capacitor | | | | | L1 | 1 | SW_SPDT | Switch, triple pole double throw, illuminated paddle, red and green LEDs K switch sp3t ON-ON-ON D Switch, triple pole double.

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