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BackQ5 | 5 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | | U2 | 1 | LED | Light emitting diode Push button switch, generic, symbol, four pins D Momentary Switch, dual pole double throw K switch dual-pole double-throw spdt ON-ON K reed magnetic switch D Switch, three position, single pole double throw, separate symbols"/>