We found this circuit with duty cycle adjustment in the May 1988 Radio Electronics magazine. The source must be symmetrical, and the frequency given by R3 and C1.
This circuit was found in Fairchild documentation and does not require integrated circuits. It...
The purpose of the presented project is to monitor up to four micro cam sequentially through a...
This circuit was found in General Electric's 1965 documentation. It appears elsewhere on the site....