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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 | | | | R3, R21, R27, R28 | 3 | A1M | \*\*Potentiometer, 16 mm vertical board mount OR: | | | C7, C12 | 1 | Conn_01x04 | Pin socket, 2.54 mm, 1x2 (see [build notes](build.md)) | | | | | | | | | | | 8 | 1N4148 | 100V 0.15A standard switching diode, DO-35 | | S3 | 1 uF | Polarized capacitor .

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