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BackSwitch https://www.ckswitches.com/media/1972/ksc6.pdf CK components KSC6 tactile switch SPST right angle, PTS645VL39-2 LFS C&K Button tactile switch with LED, generic K switch normally-open pushbutton push-button LED D MEC 5E single pole double throw Precision Timers, 555 compatible, PDIP-8 Quad operational amplifier, DIP-14"/>