This circuit was found in American documentation from the 1980s. The integrated circuit used is a voltage comparator of the time. Modern equivalents can be tested.
The operational amplifier used in this application is not the most common today. The circuit is...
This linear bargraph circuit was found in the February 1992 issue of Radio Electronics magazine. The 10...
Found in a Popular Elecronics from the 90s, this circuit appears in other versions in this section and...