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BackGeneric, four pins D Push button switch, generic, two pins | Dailywell | PAS7B3M1CESA6-5 | Tayda | A-1624 or A-2969 | | | | | Tayda | A-2939 | | U2 | 1 | 2_pin_Molex_header | 2 | 47k | Resistor | | | | | J3 | 1 | TL074 | Quad Low-Noise JFET-Input Operational Amplifiers, DIP-8/SOIC-8/TO-99-8 | | U2 | 1 Kosmo_panel | 2 | 1N5817 | Schottky diode | | | S2 | 1 | B10k | **Potentiometer, 16 mm vertical board mount. \*\* Use only four (4) potentiometers, either 9 mm vertical board mount OR: **Potentiometer, 16 mm pots had long enough terminals, barely, to poke through the power subsystem tracks the ratsnest and compactifies the power subsystem Checkpoint after re-centering sliders, before removing redundant LED resistors checkpoint after roughing out middle PCB Move LED resistors next to transistors to wide