This circuit uses a parallel resonant crystal to control the frequency. The circuit is from Radio Electronics magazine, February 1993. Equivalent transistors can be used.
Panasonic AN44183A Microstepping Motor Driver is a two channel H-bridge driver with a bipolar...
The circuit shown was obtained from a 1976s publication for radio amateurs. Its purpose is to...
The frequency of this circuit is approximately 1 Hz. Whenever the output is at low level, the LED...