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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 Kassutronic's KS-20 VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules main 5a4e89eea6 Add position for resistor between coarse and +12V, value unknown Add position for resistor between coarse and +12V, value unknown 5a4e89eea63bf71c8fd68e1168f096dfb3459aa4 More cleanup d12ec1f19bbae8f01395e4c76a152d3d4ce7a3d4 More repo cleanup, adopt github .gitignore file 8976a63dc06fa25beedf8d2553931872c491047e adds README.md file - Before producing, confirm footprint dimensions for capacitors, diodes (inc. LEDs), and barrel power jack Latest commits for file Schematics/SynthMages.pretty/SOCKET_3_PIN_HEADER_NORMAL.kicad_mod Adding SynthMages footprint library Adding SynthMages footprint library merged pull request 'Fix rail clearance issues, make all power traces large Add ground fills, fix some clearance issues, add PCB slot, more options for potentiometer spoke placement STLs, 10hp version.

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