This circuit was found in a 1967 US documentation. The circuit applies to modern general purpose transistors. The circuit has no offset. The power supply must be symmetrical.
We got this circuit from Radio Electronics from July 1990. The circuit mimics the sound of the red...
This circuit was found in a 1987 documentation. It is a timer that takes advantage of the signal of...
This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the...