Oscillator circuits
What It Does
Voltage dividers are simple but key building blocks for any ciruit. They chop voltages into into a smaller ones. Like salami!
Single opamp oscillator
Oscillator With Duty Cycle
Schmitt trigger oscillator
CD4046 VCO

The CD4046 is maybe the simplest and cheapest voltage controlled oscillator on a single chip. I couldn't add a simulation really but I wanted to add it here anyway. The CD4046 is a so called PLL and has also other functionalities on board.
Simple LFO
A classic LFO design.
Basic VCO
See for actual circuit my Github.