Standard switching diode, DO-35 Schottky Barrier Rectifier Diode, DO-41 | | | R14, R15, R18 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92 | | J1 | 1 | B20k | Potentiometer | | | L1 | 1 | LM358 | Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | | Tayda | A-1624 or A-2969 | | | | R24, R26, R28 | 4 | 100k | Resistor .
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