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BackSchematics and .ino file uses an LM13700 OTA (operational transconductance amplifier) (~$1.50, uncommon, and DIP marked obsolete) and NE5532 (uncommon.
- 4.5x1.6mm^2, 2 pins, pitch 2.54mm, package.
- Normal -0.241718 -0.796849 0.553718 facet normal.
- 5.574861e-01 facet normal 0.0357195 0.453754 0.890411.
- . . . . . . . .
- Length*width=11.5*5mm^2, Capacitor, https://en.tdk.eu/inf/20/20/db/fc_2009/MKT_B32560_564.pdf C Rect series Radial pin.