An unavoidable reality of owning a car is the 12V battery. If the battery is healthy, it should read 12 or so volts, and you ...

A plant never whispers when it needs water. It wilts, it droops, it gives up—often long before anyone notices. That silent ...

Earlier, we designed a smart energy meter that used a current sensor to measure current. In that version, we manually set the ...

What's the one tool every EV and hybrid mechanic should own because it literally saves lives? The answer is, of course, the good ol' high-voltage multimeter.

A few engineers and innovators share details about practical test and measurement habits that save time and help avoid poor ...

In this video, I discuss the pros and cons of various insulation materials and highlight common installation mistakes. 🧰 ...

From the March/April 2026 issue of Car and Driver.

I have a 2016 Toyota Highlander Limited with 166,500 miles on it. Recently, the alternator went bad, and being a 75-year-old ...

If it’s less than 14 volts, there’s a nut on the alternator’s B+ terminal that connects to a thick wire that transfers the power from the alternator to the battery. If that nut is at all loose or ...

You need reliable tools to complete electrical projects. From wire cutters to multimeters, Harbor Freight customers say that ...

In part 3 of this series, we used Kirchhoff’s voltage law to derive the branch currents and node voltages for an unbalanced ...

I Found My Home's Biggest Energy Vampire by Testing 18 Devices With a $12 Meter ...