While using a digital multimeter to diagnose electrical problems on customers’ equipment, I frequently hear the comment, “I’ve got one of those multimeter things, but I never learned how to use it.” ...

When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around the dial mean.

For the past couple of days 2 of the UPS'es in my house have been clicking like there is a line sag. The UPS'es are on completely different circuits in the house, but both are pretty basic "Connext" ...

The power supply on a computer transforms the alternating current from the wall outlet into a direct current flow that the computer's components can use. Testing the DC voltage output of the power ...

If you’ve ever experienced even a mild electrical shock, you know how powerful—and frightening—it can be. There are more than 50,000 electrical fires in the U.S. every year, and close to 400 people ...

You can characterize a semiconductor device to be its own temperature sensor by using an accurate four-wire measurement technique. Semiconductor junctions — from the millions of transistors used in ...

Like many hackers, [Matthias Wandel] has a penchant for measuring the world around him, and quantifying the goings-on in his home is a bit of a hobby. And so when it came time to sense the current ...

Learn why high-voltage environments require advanced testing tools—and how engineering teams maintain measurement integrity under demanding conditions.