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BackSP3T K switch normally-open pushbutton push-button D Push button switch, generic, two pins | | | | | C7, C12, C13 | 3 | 1k | Resistor | | | | C7, C11 | 2 | 10k | Resistor | | R4, R12, R13 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | S1 | 1 | SW_DPDT_x2 | Switch, single pole double throw, separate symbols"/>