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BackGeneric, symbol, four pins D Push button switch, generic, two pins Switch, single pole normally-open tactile switch SPST angled PTS645VL31-2 LFS C&K Button tactile switch switch normally-open pushbutton push-button LED D MEC 5G single pole double throw Precision Timers, 555 compatible, PDIP-8 | | R9 | 1 | LED | Light emitting diode Push button switch, generic, two pins | | | | | | R5, R29 | 3 | AudioJack2 | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling)