We earn commissions from purchases you make using links in our articles. Learn more. Anyone who works on their car should have a multimeter, but they come in handy around the house too. Whether you ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Ohm’s Law is the classical physics explanation of the linear relationship between voltage, current, and resistance in a conductor. Quantum mechanics provides insights into the mechanisms behind this ...

Modern digital multimeters (DMMs) are user-friendly, accurate, and safe — when used correctly! Reading voltage is simple, but measurements must be properly interpreted. With a clamp-on DMM, accurate ...

The road ahead looks like a black hole. It's so dark and so dreary, even the bravest Saturday mechanic would prefer to be off the highway and safe at home. Unfortunately, you're still hours away from ...

A technician going at an appliance with a multimeter can seem like techno-wizardry, even if they're doing something as boring as diagnosing a dishwasher that isn't drying dishes. The magic is actually ...

When working with electronic circuits, a multimeter is one of the most essential tools you can have. Multimeters help measure voltage, current, resistance, and continuity, making them indispensable ...

The simple act of pressing a car’s power-window button and having the window roll up brings quite a few components into play. If the window does not roll up, it likely means there’s a problem with one ...