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Dual Operational Amplifiers, DIP-14/SOIC-14 | | U1 | 1 | B10k | Potentiometer | | | | R30 | 1 | LED | Light emitting diode | | | | | Tayda | A-3545, A-3489, or A-3499\*\*\* | | Tayda | A-157 | | | | | S2 | 1 | B10k | Potentiometer | | R15, R17, R19 | 3 | 1k | Resistor | | | | | R25, R27, R29 | 3 | 22k | Resistor | | | | 1 | LED | Light emitting diode, 5 mm Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 | 4 | 47k | Resistor | | Q1, Q2, Q3 | 3 pin Molex header 2.54 mm spacing D Switch, three position, single pole double throw | | D1, D2, D3, D4, D5, D8, D9, D10 Standard switching diode, DO-35 | | D3, D4, D5, D8, D9, D10 | 8 pin SIM connector for.

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