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Back(https://www.alps.com/prod/info/E/PDF/Tact/SurfaceMount/SKRT/SKRT.pdf push horizontal SPST 1P1T straight NO SMTR C&K E-Switch sub miniature slide switch, vertical, SMT J bend https://dznh3ojzb2azq.cloudfront.net/products/Slide/JS/documents/datasheet.pdf MEC 5G single pole double throw D Switch, three position, dual pole double throw, separate symbols | | | | | | | | | R30 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 Quad operational amplifier, DIP-14"/>