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BackOutside the full 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 EPCOS app note 93 (https://www.catagle.com/45-2/PDF_AN93.htm Bourns TBU-CA Fuse, 2 Pin (https://www.bourns.com/data/global/pdfs/TBU-CA.pdf), generated with kicad-footprint-generator Molex MicroClasp Wire-to-Board System, 55932-1110, with PCB trace layout created pull request 'More schematics' (#3) from schematic into main ... Footprint "SOCKET_3_PIN_HEADER_NORMAL" (version 20211014) (generator pcbnew Latest commits for file Datasheets/tl074-pinout.jpeg From a704d3e530a1af53937ba04c8656790dad735ad7 Mon Sep 17 00:00:00 2001 Subject: [PATCH 04/18] adds front panel and pcb into different files Fireball/Fireball.kicad_pcb | 2 | 1N5817 | Schottky diode | | R16, R18, R26 | 3 | 10uF | Polarized capacitor | | | | | J9 | 3 | A1M | \*\*Potentiometer, 9 mm vertical board mount | | | R14 | 1 | SW_Push | Push button switch, generic, two pins