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Light-emitting diode - Wikipedia
Light-Emitting Diodes (LEDs) - SparkFun Learn
How Light Emitting Diodes Work | HowStuffWorks
LED (Light-emitting diode) explained - Soldered Electronics
Light Emitting Diode (LED): What is it & How Does it Work?
LED | Definition, Light, & Facts | Britannica
Light Emitting Diode or the LED Tutorial - Basic Electronics Tutorials ...
How do diodes and light-emitting diodes (LEDs) work? - Explain that Stuff
LED - Light Emitting Diode: Basics, Types and Characteristics
What Is an LED? - How-To Geek