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BackX1SON 2 pin Molex connector 2.54 mm spacing Pin header 2.54 mm spacing | | | | C1, C11, C12 | 1 | 3_pin_Molex_header | 3 | 1nF | Film capacitor | | R9, R11, R13 | 3 | A1M | Potentiometer | | | Q1, Q2, Q3 | 3 | 1k | Resistor | | | L1 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 Quad operational amplifier, DIP-14"/>