Our CEM3340 VCO is a straight-forward, easy-to-build implementation of the CEM3340 voltage-controlled oscillator IC by Curtis Electromusic. The circuit was featured in 2019/Issue 3 of Nuts & Volts magazine. To make building and using the circuit convenient, we are offering boards and full kits in both bare oscillator board format or Eurorack format.
For Knobcon 2018 I decided I wanted to make an oscillator kit that would pair with the Business Card Sequencer I'd done a couple years earlier. I started out creating a basic oscillator, but there was room for more knobs, so I kept adding features until there wasn't any more room:Multiple wave shapesGlide2x LFOs (that can control pitch or amplitude or both)Attack/ReleaseLow-Pass FilterSample & HoldWhat I ended up with...
