1Khz to 20Mhz Low Power Oscillator

https://www.electronics-lab.com/1khz-to-20mhz-low-power-oscillator/

This is a precision, low power oscillator that occupies very little space.  The oscillator frequency is adjustable using an onboard multi-turn trimmer potentiometer. The output of the circuit is very accurate and has a 1.5% frequency error. The project operates with a single 5V power supply and provides a rail-to-rail, 50% duty cycle square wave […]