How LED Works – Unravel the Mysteries of How LEDs Work!

How do LEDs work?
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In this video, we’ll explain LED technology in an easy to understand way. We’ll cover the different types of LED lights, the different colors that LEDs can emit, and the different applications for LED technology and how they work.

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[0:00] Why LEDs Produce Different Colors
[0:08] How an LED Produces Light
[0:20] Can an LED Generate Voltage from Light?
[0:30] What LEDs Are and How They Work
[0:52] LED vs Diode Explained
[1:08] Visible Light, Infrared and Photon Wavelengths
[1:39] Why TV Remotes Use Infrared LEDs
[1:54] How LEDs Emit Photons
[2:07] Why LEDs Are More Efficient Than Incandescent Bulbs
[2:45] Through-Hole vs SMD LEDs Explained
[3:57] White LEDs Explained
[4:07] Why Data Privacy Matters Online
[5:18] Why LED Cases Have Different Colors
[5:44] LED Polarity Explained
[6:03] How to Identify LED Anode and Cathode
[6:54] Flashing LEDs and Self-Blinking LEDs
[7:22] Bi-Directional, Bi-Color and RGB LEDs Explained
[8:22] How RGB LEDs Create Different Colors
[8:52] Why LEDs Need a Resistor
[9:26] How a Resistor Protects an LED
[9:34] How Current Controls LED Brightness
[10:03] LED Drivers Explained
[10:28] How LED Strip Lights Work
[10:48] LED Construction Explained
[11:30] Inside an LED: Anode, Cathode and Semiconductor
[12:04] How Semiconductor Material Determines LED Color
[12:15] Electricity, Conductors and Insulators Explained
[12:52] N-Type and P-Type Semiconductor Explained
[13:43] PN Junction and Depletion Region Explained
[14:05] Forward Bias and LED Threshold Voltage
[14:52] Forward Voltage vs Forward Current Explained
[15:01] Energy Bands, Valence Band and Conduction Band
[15:58] Why Silicon Diodes Emit Infrared Light
[16:43] Why LEDs Use Gallium Arsenide and Gallium Phosphide
[17:26] How Semiconductor Band Gap Determines LED Color
[18:18] How Material Mixing Creates Red, Yellow and Green LEDs
[18:33] How White LEDs Became Possible