This 4 1/2 digit digital voltmeter circuit was published in the April 1993 Electronics Now magazine. The circuit uses the integrated component of the time and has 5 voltage ranges.
Found in a QST from the 90's this circuit is suitable for the medium and short-wave range. |...
The circuit shown in figure 1 consists of an Inverter Module for CCFL Lamp that can be supplied with...
This circuit is based on the voltage reference that is uncommon today MC1403. Equivalents can be...