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Schematics/Dual_VCA_with_cv2_OTA.diy Start of LM13700 version to see why main *-backups Forget (and ignore) fp-info-cache file as it is safe to put the output jacks output_column = width_mm - thickness*2; // draw panel, subtract holes // v_wall(h=4, l=height-rail_clearance*2-thickness); // top edge or circumference using spheres (or rather regular polyhedra) arranged in a circuit outside 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 https://www.analog.com/media/en/technical-documentation/data-sheets/199399fc.pdf TO-92 2-pin leads in-line, narrow, oval pads, drill 0.75mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/219.pdf), SMD, LowProfile, JPin SMD 1x-dip-switch SPST , Slide, row spacing 15.24 mm (600 mils), Socket 12-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), Socket, LongPads 12-lead though-hole mounted DIP package, row spacing 7.62 mm (300 mils), http://multimedia.3m.com/mws/media/494546O/3mtm-dip-sockets-100-2-54-mm-ts0365.pdf 3M 42-pin zero insertion force socket, through-hole, row spacing 8.89 mm (350 mils), body size 6.7x32.04mm (see e.g. Https://www.ctscorp.com/wp-content/uploads/219.pdf), SMD, LowProfile SMD 1x-dip-switch SPST Copal_CHS-01B, Slide, row spacing 16.51 mm (650 mils), SMDSocket.

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