Engineeringness on MSN

How Do LEDs Make Light From Electricity?

They’re in your phone, TV, car headlights, remote controls—even traffic lights. LEDs (Light Emitting Diodes) are everywhere.

I 'hacked' my home with 7 smart plug tricks - here's the setup (and why it works)

Smart plugs are a simple, affordable way to upgrade your home. Here are some clever ways I use them for automation.