Most homes already have a smart meter that digitally communicates with the electric grid. If you're looking to get rooftop solar panels, a smart meter is an essential piece of equipment. Here's why.

With this guide, you'll learn the ins and outs of troubleshooting your home and household electronics using a handy multimeter.

If you have a box of old bulbs in unknown conditions, use your multimeter to test which ones are good and which ones are blown. Confirm your meter is set in continuity test mode (see step 2) and ...