How to Test a Computer Power Supply Using a Voltmeter. The power supply on a computer transforms the alternating current from the wall outlet into a direct current flow that the computer's ...

A voltmeter and ammeter are to an electrical system what a pressure gauge and a flow gauge are to an oil pressure system: A voltmeter measures electrical pressure in volts; an ammeter measures ...

If you’ve ever been vexed by these limitations then [Alun Morris] has just the project for you, in the world’s smallest auto-ranging multichannel voltmeter.

To determine the power, current, and voltage of a USB socket, Windows on-board tools, freeware, and test sticks from $10 can be used.

How Redline Gauge Works Makes Old Ford Tachs Work with Modern Ignitions and Turns Ammeters into Voltmeters—All Without Changing Their Original Appearance.