Your LED Questions Answered! (Part 1)
Ask an Electrical Engineer is a series where frequently asked questions from non-engineers will be answered by an engineer. For this video, our main topic is all about LEDs (Light Emitting Diodes).
What's covered in this video:
00:24 How do LEDs (light emitting diodes) work ... and what's a diode?
02:05 Why are LEDs better?
02:58 When did LEDs become popular?
04:14 How much more efficient are LEDs than other options?
05:12 Why do LEDs last so long?
06:47 Are LEDs AC or DC?
08:20 What are LEDs made from?
09:36 Are LEDs polarized?
10:41 Will 24v LEDs work on 12v?
12:14 How do LEDs change color?