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BackSwitch, separate symbol D 3x DIP Switch, Single Pole Single Throw (SPST) switch, small symbol D Push button switch | | | | 14 pin DIP socket A-004 4 Knobs Screws, nuts, and spacers (see [build notes](build.md)) | | | Tayda | A-559 | | Tayda | A-1531 or A-557 | | | | R17, R19 | 3 | 2N3904 | 0.2A Ic, 40V Vce, Small Signal NPN Transistor, TO-92 R16, R17, R19, R20 | 4 | 100k | Resistor | | | | 1 | LM358 | Low-Power, Dual Operational Amplifiers, DIP-8/SOIC-8/TSSOP-8/VSSOP-8
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- 1757488 12A || order number: 1777206.
- ZAV S-PBGA-N289 Texas Instruments, NDQ.