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BackTwo pins Switch, single pole double throw K switch normally-open pushbutton push-button D MEC 5G single pole double throw, separate symbols | | | | Tayda | A-1121 | | C3, C4, C11 | 3 | 1nF | Film capacitor | | | | J1 | 1 | 100k | Resistor | | | | | | | | S1 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8"/>