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Back100V 0.15A standard switching diode, DO-35 Pin header 2.54 mm spacing 2 pin Molex header 2.54 mm spacing D 3 pin Molex connector 2.54 mm spacing | | J3, J4, J5 | 3 | 10uF | Polarized capacitor | | | | | | | | R21, R22, R23 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | R1, R2, R23, R24 R3, R21, R27, R28 R4, R6, R7, R30, R31 Switch, dual pole double throw, separate symbols | | Q1, Q2, Q3, Q4, Q5 R1, R2, R23, R24 R3, R21, R27, R28 R4, R6, R7 | 2 | 47k | Resistor | | | Screws, nuts, and spacers (see [build notes](build.md | | | | R3, R21, R27, R28 R4, R6, R7, R30, R31 Switch, dual pole double throw | | | | | S2 | 1 | 2_pin_Molex_header | 2 aoKicad | 2 | 1M | Resistor | | | R31 | 1 | 1 | Conn_01x10 | Pin socket, 2.54 mm, 1x10 | | S3 | 1 | SW_Push | Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 KK254 Molex connector 2.54 mm spacing Pin header 2.54 mm spacing