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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 8.2mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 37-pin D-Sub connector edge mount solder cup male x-pin-pitch 2.77mm mounting holes 25mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 9-pin D-Sub connector horizontal angled 90deg THT male pitch 2.41x1.98mm pin-PCB-offset 9.4mm 9-pin D-Sub connector edge mount solder cup female x-pin-pitch 2.77mm mounting holes 63.5mm, 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 to PCB edge 15.979999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 15-pin D-Sub connector horizontal angled 90deg THT female pitch 2.29x1.98mm pin-PCB-offset 9.4mm 26-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, female, pitch 2.77x2.84mm, pin-PCB-offset 7.699999999999999mm, distance of mounting holes to PCB edge 15.979999999999999mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 62-pin D-Sub connector horizontal angled 90deg THT male pitch 2.41x2.54mm pin-PCB-offset 9.4mm 25-pin D-Sub connector horizontal angled 90deg THT female pitch 2.77x2.84mm pin-PCB-offset 4.9399999999999995mm mounting-holes-distance 63.5mm mounting-hole-offset 63.5mm 37-pin D-Sub connector, horizontal/angled (90 deg), THT-mount, male, pitch 2.29x1.98mm, pin-PCB-offset 9.4mm, see http://docs-europe.electrocomponents.com/webdocs/1585/0900766b81585df2.pdf 44-pin D-Sub connector edge mount solder cup female x-pin-pitch 2.77mm mounting holes to 5mm + unplated, and revises jack footprint b284a71188 gets comfier with gitignore and git rm --cache b284a71188b23f9f8c43bee1fcce2820249f4384 learns about gitignore and git rm --cache 269f3bf9f9 power word stun initial commit by power word stun initial commit by 269f3bf9f9109b69cf4264b79cb1ed6f6a114782 footprint "3.5mm_jack_hole_nonpcb" (version 20221018) (generator pcbnew footprint "PinSocket_1x03_P2.54mm_Vertical" (version 20211014) (generator pcbnew footprint "PinSocket_1x02_P2.54mm_Vertical" (version 20211014) (generator pcbnew Latest commits for file Schematics/SynthMages.pretty/Switch.dcm From e97ef3972850f598b56fc0365b7ac9a8c525cde5 Mon Sep 17 00:00:00 2001.

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