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BackSPST LED OFF-ON D Double Pole Single Throw (DPST) Switch K switch dual-pole double-throw DPDT 3pdt ON-ON D Screw terminal, single row, 01x03 D 2x5 pin shrouded header 2.54 mm spacing | Tayda | A-1135 | | | J6, J10, J11 | 3 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 | | Tayda | A-159 | | | | | | | Tayda | A-1531 or A-557 | | | U1 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | | | | | | 2 | 47k | Resistor | | J5, J12, J13 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92"/>