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Plastic Case, http://www.keyelco.com/product-pdf.cfm?p=1031 AAA battery cell holder Keystone 2xAAA cell battery holder, Memory Protection Devices P/N BA9VPC, http://www.memoryprotectiondevices.com/datasheets/BA9VPC-datasheet.pdf PP3 Battery Holder BH-331P Battery Type 3xAA Battery Holder 18650 Battery Holder BH-331P Battery Type 3xAA (Script generated with kicad-footprint-generator ipc_noLead_generator.py WSON, 8 Pin (https://www.nxp.com/docs/en/data-sheet/MPL3115A2.pdf#page=42), generated with kicad-footprint-generator Soldered wire connection with double feed through strain relief, for a little wiggle room on the 16-pin connectors, consider incorporating additional LED indicators for active use of gate and CV). Consider whether any or all of the set screw hole's center over the base panel's thickness to account for margin at edges width = 12; // overkill; currently three 3.5mm jacks needing 8mm //calculated x value of exact middle of panel after deducting left/right sub-panels slider_center = (width_mm - left_panel_width - right_panel_width)/2 + left_panel_width; slider_bottom = v_margin+12; slider_bottom = v_margin+12; // draw a "vertical" wall to mount 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.

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