This is a dual LFO synth module in Kosmo format, based on a Kassutronics design. There are three outputs for each LFO. Depending on the shape pot setting these provide ramp, asymmetric triangle, symmetric triangle, or sawtooth waveforms; sine or skewed “sine” waveforms; and narrow, square, or wide pulse waveforms respectively.
I replaced the original JFET-based tri to sine section with a differential BJT pair one.
A few problems on the first run PCBs but they’re fixable with some kludging. Some mistakes of mine, and a couple of problems with the Kassutronics circuit. I made corrections to the PCB but have not tested the corrected version.
I also updated design of the front panel, which should say “Kassutronics” rather than “Analog Output”.
Schematics, KiCad design files, Gerbers, and documentation in the GitHub repo: GitHub - holmesrichards/kdlfo: Shape variable dual LFO synth module in Kosmo format
