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 the July 1994 issue of Electronics Now magazine. The circuit can use...
The transistors in this 80's documentation project may be BC548, the most modern equivalents of...
This circuit was found in an Electronic World of 1968. The circuit uses power transistors of the...