KiCad project for the circuit and PCB of R.A. Penfolds VCO design which I adapted as a Eurorack powered module. The original circuit is taken from the book, "Electronic Synthesiser Construction" by R. A. Penfold, published by Babani in 1986.
I have kept to the original design as much as possible, but added power and switched INT.CV via a Eurorack spec bus.
The circuit and PCB are verfied to work and being used as part of my modular build.