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Back| B20k | Potentiometer | | R25 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 | | | | | | | C1 | 1 | 4.7 uF | Unpolarized capacitor | | | | J5, J12, J13 | 3 | 10k | Resistor | | | | | | | D3, D4, D5, D6, D7, D8, D9, D10 Standard switching diode, DO-35 Pin header 2.54 mm 2x5"/>