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Switch ON-ON | | | Tayda | A-1672 | | | | | | | D1, D2 | 2 | 1M | Resistor | | U1 | 1 | 4.7 uF | Unpolarized capacitor | | R1, R2, R23, R24 R3, R21, R27, R28 R4, R6, R7 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | Tayda | A-004 | | | 1 | TL074 | Quad operational amplifier, DIP-14

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