Elmyra Drone Synthesizer from Neutral Labs on Tindie
Anglerfish DIY Drone Synthesizer : r/synthesizers
Drone Synth - Layout and schematic update over the hand drawn one from earlier, based on LMNC oscillator w/filter. Curios what other ideas to add to this, I have seen capacitor switching
electro-music.com :: View topic - first mini drone synth