After initially working to create a modernized replica of a Czechoslovakian 4-digit Metra M1T242 voltmeter, [Jaromir Sukuba] figured that while he was at it, he might as well create a voltmeter ...

If you are under a certain age, you might not know the initialism VTVM. It stands for vacuum tube voltmeter. At first glance, you might just think that was shorthand for “old voltmeter” but ...

Voltage is measured in volts, V, with a voltmeter. Voltmeters are always connected in parallel. This is because it is measuring the difference in energy between the two points it is connected across.