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BackButton tactile switch http://www.ckswitches.com/media/1479/kmr2.pdf CK components KSC7 tactile switch with two LEDs K switch normally-open pushbutton push-button LCD D MEC 5G single pole double throw, separate symbols K switch normally-closed pushbutton push-button D Push button switch, generic, separate symbols, four pins D Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8"/>