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Side push button (https://www.alps.com/prod/info/E/PDF/Tact/SurfaceMount/SKRT/SKRT.pdf push horizontal SPST 1P1T tactile switch with 6 positions D 2 pin Molex connector 2.54 mm 2x5 | | | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 KK254 Molex header Operational amplifier, DIP-8 | | | | R25, R27, R29 | 3 | 2N3904 | 0.2A Ic, 40V Vce.

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