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BackThru-hole 14 pin DIP socket A-004 4 Knobs Screws, nuts, and spacers (see build notes) 1 SIP socket, 2.54 mm, 1x10 Pin header, 2.54 mm, 1x2 (see [build notes](build.md)) | | R24, R26, R28 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 **Potentiometer, 9 mm vertical board mount | | | | | Tayda | A-1847 | | Tayda | A-1121 | | J2 | 1 | SW_Push | Push button switch OFF-(ON) | Dailywell | PAS6B3M1CESA3-5 or PAS6B3M1CESA2-5 | Tayda | A-1672 | | J9 | 1 | SW_Push | Push button switch OFF-(ON CMOS General Purpose Timer, 555 compatible, PDIP-8"/>