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Audio Jack, 2 Poles (Mono / TS) | | | ----- | --- | ---- | | U2 | 1 | LED | Light emitting diode | | | | C1, C11 | 2 pin Molex header Operational amplifier, DIP-8 | | | | | | | R17, R19 | 3 | 2N3904 | Small Signal NPN Transistor, TO-92 | | | | Screws and spacers (see build notes The build is pretty straightforward except for mechanical assembly, and one other than copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE (“AGREEMENT”). ANY USE, REPRODUCTION OR DISTRIBUTION OF.

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