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.
Facebook on MSNOpinion

Why Is That Light Not Working? Can You Spot The Problem?

A quick troubleshooting moment as the team investigates why a light isn’t working — testing observation and problem-solving ...