Modular Synth VCO Design & Build

In this video I build a voltage controlled oscillator (sawtooth core). It's inspired by the early Elektor Formant synths, and designed to integrate with existing Eurorack synthesizer systems. I'll also talk about how I breadboarded up a MIDI to 1V/octave converter to go with it for keyboard/computer control. 0:05 - Sound tests 1:12 - Build Montage 2:30 - Controls explanation 3:44 - Inspiration (Elektor Formant, NGF) 5:01 - Schematic overview 7:53 - Heater experiment 10:17 - Reason for building this 10:44 - Breadboarded MIDI to 1V/OCT converter 13:23 - PCB bodges made 14:15 - Outtro KiCAD design files: https://github.com/schnommus/formant_vco_prototype Code I wrote for the PADI IoT stamp in the video for MIDI/CV conversion: https://github.com/schnommus/padi-midi-cv Hadn't originally planned on publishing a video about this board but I had so much fun with it that I though it was worth making a video about! WEBSITE POST: https://sebholzapfel.com/blog/modular-synth-vco-design-build/ CALLSIGN: VK2SEB