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 Motorola's Linear Interface ICs of 1993. The integrated circuit used is not...
This configuration was found in a publication for radio amateurs in 1979. The two integrated...
This circuit makes use of a 741 single source operational amplifier to measure resistors on a...