Schematics and images are shown below.
|VCO on copper plane. A potentiometer is used as voltage source.|
|VCO schematic based on design from The Art of Electronics.|
|Sawtooth and square wave output from VCO.|
In the junk room in my cellar, I found an old power amplifier with a lot of RCA jacks on the back, which I'll use to connect the different modules to each other. More on this topic later on.