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1x4 Light emitting diode | Tayda | A-159 | | | | Tayda | A-553 | | | | | R9, R11, R13 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92 Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) 100V 0.15A standard switching diode, DO-35 Pin header 2.54 mm spacing R23, R24, R25, R27 | 4 | 47k | Resistor | | | R25, R27, R29 | 3 | 4.7k | Resistor | | | | | | Q1, Q2, Q3, Q4, Q5 | 5.

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