We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a frequency range determined by C1 and R3. The signal generated is square.
This circuit was found in a General Electric documentation from 1970. Equivalent transistors can be...
This circuit is based on an operational window comparator. We found it in a documentation from the...
This circuit can be used with motors or resistive loads, such as heaters and incandescent lamps....