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BackLib="Transistor_BJT" part="2N3904" description="0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 | | | | J9 | 1 | Conn_01x02 | SIP socket, 2.54 mm, 1x2 (see [build notes](build.md | | | | | Tayda | A-1672 | | | | | ----- | --- | ---- | ---- | | Tayda | A-553 | | | S3 | 1 | SW_Push | Push button switch, normally closed, generic, four pins D Momentary Switch, single pole double throw, separate symbols