This is the first module I decided to build (an oscillator seemed like the obvious place to start). The schematic is mostly taken from Moritz Klein's EDU DIY VCO, but the PCB and front panel are my own.

When I was stocking up on components I made the mistake of buying a whole bunch of solder lug potentiometers instead of PCB-mount ones. Why I did this I could not tell you, but as a result this PCB is (along with many future ones) designed to be hand-wired to the pots and jacks on the front panel. This makes it a bit more annoying to build, but it's not the end of the world.

I got the PCB and front panel made by JLCPCB, and I'm pretty happy with how they came out. The gerber files for both are available on github.

This was the first PCB I've ever designed, so I was pretty excited when it actually worked after I soldered everything together.