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BackH=15mm C&K PVA2 https://www.ckswitches.com/media/1343/pva.pdf momentary / push-push button, h=15mm C&K PVA2 https://www.ckswitches.com/media/1343/pva.pdf tact sw push 6mm smd CK components KMR2 tactile switch with LCD screen K switch normally-closed pushbutton push-button LCD D MEC 5G single pole double throw Precision Timers, 555 compatible, PDIP-8 | | R3, R21, R27, R28 | 3 | 22k | Resistor | | | | | C6, C7, C8, C9 | 5 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92"/>
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