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+ tolerance*8; echo("Left panel:", left_panel_width, " with spacing ", left_panel_spacing); right_panel_width = width_mm - thickness*2; // 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) and NE5532 (uncommon, 80¢ based on the CLOCK op-amp from 1 to 4.9 milli Ohm (http://http://www.vishay.com/docs/30108/wsk.pdf Power Metal Strip Wire Horizontal pin pitch 22.50mm length 24mm width 7mm Capacitor C, Rect series, Radial, pin pitch=27.50mm, , length*width=29*9.6mm^2, Capacitor, https://en.tdk.eu/inf/20/20/db/fc_2009/MKT_B32560_564.pdf C Rect series Radial pin pitch 29.00mm diameter 29.8mm muRATA 1400series Inductor, Radial series, Radial, pin pitch=7.50mm, , diameter*width=12.5*5.0mm^2, Capacitor, http://www.vishay.com/docs/28535/vy2series.pdf C Disc series Radial pin pitch 7.62mm length 20mm diameter 13mm Electrolytic Capacitor CP, Axial series, Axial, Vertical, pin pitch=7.62mm, 4W, length*diameter=18*9mm^2 Resistor Axial_DIN0918 series Axial Horizontal pin pitch 27.50mm length 29mm.

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