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 optically coupled circuit was found in the February 1968 Radio Electronics magazine. The...
This circuit uses a special 1950's RCA strobe tube. It can be built with equivalent components for the rest...
This circuit, already explored on this site, can be applied to other comparators in the same...