This circuit was found in the February 1981 issue of Radio Electronics magazine. The circuit uses an active component of the time and is suitable for audio signals.
This circuit was found in a book on transistors from 1954. It works by the beat that is detected by...
This stage for general purpose transistors was taken from an old technical manual. The circuit can...
This circuit provides reverse power polarity protection using a power MOSFET and a diode. The...