This simple analog instrument circuit was found in the October 1977 issue of Radio Electronics magazine. The diodes are germanium for greater sensitivity.
The presented circuit provides voltages from 4.5 V to 12 V with currents up to 1 A. We obtained this...
This circuit was found in the March 1980 issue of Radio Electronics magazine. It is based on the...
Found in older American documentation, this circuit can monitor 3 or more voltages determined by...