engineer1000
Advanced Member level 4
I want to design a variable 135khz oscilator say from 130khz to 138khz. At the moment Im using a 555 timer with a pot.Fed through a D type to get the 50% duty cycle. The problem being if I turn off the oscillator and then turn it back on the frequency has shifted slightly so I have to re-adjust. So what I want is an oscillator that once set will stay at that frequency with little or no drift . Any ideas welcome