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.
This circuit was found in an old Popular Electronics. With it we can check the operation of a...
This circuit is from a documentation from the 90s. The transistor can be any general-purpose FET...
This circuit is from old documentation, but can be easily assembled as components are still...