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.

Measuring tiny differences in high-voltage circuits usually requires specialized differential test probes, which are often expensive. Fortunately, it’s possible to build your own high-voltage probe ...

It’s easy to mistake pipes, wiring, and more for a stud if you’re inexperienced. Follow our best tips for success every time.

Occasionally a design requires capacitors that are much closer to being identical in value to one another than the usual ...

Using electrochemical impedance spectroscopy (EIS) techniques to help obtain battery working conditions like SOH and SOC.

The chances of being caught stranded are practically non-existent if you have a reliable jump starter. Here are the very best ...

Consumer Reports' auto experts explain how you can keep your car, SUV, or truck in top shape, with advice especially for ...

They’re inexpensive and easy to use, and they help keep you safe when doing DIY electrical work. Solution: Test. Use. Verify. First, test the tester by holding it to a known live circuit, like a ...

Matt is the former Head of the Coverage Team at The Motley Fool. He was a full-time Motley Fool employee from 2012-2025 and is a former advisor and analyst for multiple Motley Fool services. Matt's ...