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A-1157 or A-2425 | | | S1 | 1 | LED | Light emitting diode, 5 mm Small Signal NPN Transistor, TO-92 KK254 Molex header 2.54 mm spacing"/> Small Signal NPN Transistor, TO-92 | | | | | | | | 8 | 1N4148 | 100V 0.15A standard switching diode, DO-35 | | Tayda | A-3588 | | | R23, R24, R25, R27 | 4 | 47k | Resistor | | | | | Tayda | A-3545, A-3489, or A-3499\*\*\* | | | | | | J5, J12, J13 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS) Audio Jack, 2 Poles (Mono / TS)"/> Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8"/>

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