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Dev board (in some cases) Arduino + DAC https://www.youtube.com/watch?v=t3kUPjdiq0o for explainer https://drive.google.com/drive/folders/156nn9rClRLJplS4M46s56-Pibi86Z-Kp for schematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon, 80¢ based on the bottom // you can also see my solution to getting the LED footprint and socketed the LED. If I ever do a new fetcher, use the two front panel and pcb into different files main MK_SEQ/Schematics/Unseen Servant/Unseen Servant_slider_board_noncanonical.kicad_dru UI: 11 potentiometers 11 SPDT switches 13 SPDT switches: // 1 for manual step (sw13) // 1 for once/cont (sw15 // 2.

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