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Https://hkadesign.org.uk/monotronkb.html for 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 Kassutronic's KS-20 VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some example modules Latest commits for file Schematics/resistor_keyboard.diy 16055f0ae5 Delete 'Panels/futura light bt.ttf' Delete 'Panels/futura light bt.ttf' Futura BT font files These were used in the documentation.

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