This circuit was found in the June 1991 issue of Radio Electronics magazine. The circuit uses two Hall effect sensors of the time. It can be assembled using modern equivalents.
This circuit was obtained in an old European documentation. The integrated circuit used is...
The presented circuit is used to test ordinary fluorescent lamps. This circuit also has a mains...
Used in radio reception, this circuit was found in the February 1983 Radio Electronics magazine. The...