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.
The transistors of this circuit may be general purpose and the power supply comes from the TTL...
We found this circuit with the CMOS4046 in the August 1994 Electronics Now magazine. The circuit is...
This setting appears with variations at various points on this site. This is from a Motorola...