Building a 74HC14 relaxation oscillator is one of the simplest ways to generate a square wave using just one IC, a resistor ( ), and a capacitor (
The output pin of the 74HC14 has a maximum current rating. 74hc14 oscillator calculator
: If using a potentiometer for variable frequency, add a small fixed resistor (e.g., Building a 74HC14 relaxation oscillator is one of