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User (58 "User.9" user Component Count: 77 Refs 3 pin Molex header Operational amplifier, DIP-8 | | | | C2 | 1 | AudioJack2_SwitchT | Audio Jack, 2 Poles (Mono / TS), Switched T Pole (Normalling) | | | R5, R29 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92"/> 100V 0.15A standard switching diode, DO-35 | | | | | J7 | 1 | Conn_01x04 | Pin header, 2.54 mm, 1x4 Pin header, 2.54 mm, 1x2 (see [build notes](build.md | | | | | C2 | 1 | 1 | Conn_01x04 | Pin socket, 2.54 mm, 1x4 | | | | | | | | | | | | J9 | 1 | ICM7555xP | CMOS General Purpose Timer, 555 compatible, PDIP-8 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | | | | | | R25, R27, R29 .

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