This circuit allows you to vary the duty cycle without changing the frequency. An interesting application for PWM controls. The circuit is from a Radio Electronics magazine from July 1985.
We found this circuit in an old documentation from the 70s, but it can be assembled with more...
This circuit controls a fan in the car, according to the temperature, activating it automatically when the...
This circuit was obtained from a 1967 General Electric documentation. The circuit makes use of...