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BackDouble-throw ON-OFF-ON D Single Pole Single Throw (SPST) switch, separate symbol D 11x DIP Switch, Single Pole Single Throw (SPST) switch D reed switch, default-closed D SPDT reed switch K switch sp3t ON-ON-ON D Switch, single pole double throw, separate symbols | | Screws, nuts, and spacers (see [build notes](build.md)) | | | C3, C4, C11 | 3 | 1 Hardware/lib/aoKicad | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8"/>