Found in a 90s documentation, this circuit makes use of D1, a switching diode that is uncommon today. D3 is an LED. The circuit monitors 12 V batteries.
The integrated circuit used is not common today. The circuit is from the SGS linear integrated circuits...
This circuit includes the power supply from the power grid. We found it in Radio Electronics from...
This circuit was found in the April 1998 issue of Electronics Now magazine. The circuit uses...