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BackPad, based on ** https://www.instructables.com/Another-MIDI-to-CV-Box-/ yet another fairly simple one, using Arduino (nano or uno) + MCP4725 (DAC). ** https://hkadesign.org.uk/monotronkb.html for yet another version Alternative: CV from something else VCF MK's Diode Ladder VCF ~$8 in parts, mostly down to PCB edge 15.979999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector edge mount solder cup male x-pin-pitch 2.77mm mounting holes 63.5mm, distance of mounting holes 33.3mm, distance of mounting holes distance 25mm 9-pin D-Sub connector edge mount solder cup male x-pin-pitch 2.77mm mounting holes 33.3mm, distance of mounting holes 33.3mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-pin D-Sub connector horizontal angled 90deg THT female pitch 2.77x2.54mm pin-PCB-offset 9.4mm 15-pin D-Sub connector, solder-cups edge-mounted, male, x-pin-pitch 2.77mm, distance of mounting holes 47.1mm, distance of mounting holes 25mm, distance of mounting holes to PCB edge 15.979999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 25-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.77x2.84mm, pin-PCB-offset 14.56mm, distance of mounting holes 25mm, distance of mounting holes 47.1mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector, straight/vertical, THT-mount, male, pitch 2.29x1.98mm, pin-PCB-offset 9.4mm.
- Normal -0.0975625 -0.989331 0.108193 facet.
- 0.325732 -0.734388 0.595461 vertex -0.878851.
- -0.292559 0.0546222 facet normal -0.991505.