Here is a dual low frequency oscillator in Kosmo format, based on a Kassutronics design. It features a tri to sine converter based on cheap 2N3904 transistors and a shape morphing knob that gives you ramp to skewed triangle to symmetric triangle to sawtooth, similar variations on the sine, and variable width pulse waves.

00:00 Intro
00:10 Circuit design
04:20 My version's changes
07:10 Demo
11:47 Wrapup

Schematics, KiCad design files, Gerbers, and documentation in the repo: https://gitlab.com/rsholmes/kdlfo

Kassutronics blog post: https://kassu2000.blogspot.com/2015/1...

My blog post: https://analogoutputblog.wordpress.co...

Music: Ringtone by Rich Holmes