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.

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 ...

A power supply’s efficiency rating tells you how much energy makes the conversion from AC power (what it draws from the wall) to DC power (what your PC’s components run off of). The rest is ...