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Back| R2, R5 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 | | | | | Tayda | A-2939 | | | | | D6, D7 | 2 | 10uF | Polarized capacitor | | | R31 | 1 | LM358 | Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TO-99-8"/>