Recommended · for some experience
#105: More Circuit Fun: Simple 3 transistor sawtooth generator / oscillator
Why people recommend it
Builds a simple three-transistor sawtooth oscillator and shows it running on a scope; people copy the circuit but report it gets finicky at higher frequencies.
Watch for: behaviour at higher frequencies
In their words
Here is a nice and straight-forward sawtooth oscillator that I learned from this video.
Gunther Schadow on electronics.stackexchange.com, Aug 2020. CC BY-SA.