Getting Started with the Arduino - Controlling the LED (Part 1)
Connecting LEDs
Resistors for LED Circuits | Resistor Applications | Resistor Guide
LED Polarity - Blog | Switch Electronics
Light Emitting Diode (LED): What is it & How Does it Work? | Electrical4U
Everything You Need To Know About LED Lighting
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The Dark Side of LED Lightbulbs - Scientific American
LED | Definition, Lights, Types, & Facts | Britannica
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Light-emitting diode - Wikipedia
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