LED lights can be found around our houses, in our toys, and in the streetlights around our towns. But what are LEDs? How do they work? And how are their colors created? Watch this puppet-filled Circuit Playground video, L is for LED, from the team at Adafruit.
The letters L.E.D. stand for light-emitting diode, and inside each one is a small crystal that, when properly connected with electricity, lights up.
LEDs that light up red have a crystal made of gallium arsenide. An aluminum gallium crystal creates green, and indium gallium nitride creates blue. Together, they’re referred to as RGB, and in different combinations, they create other colors on the color wheel.
Watch this next: D is for Diode.
Plus watch more Circuit Playground videos, more electricity-related videos, and more videos with LEDs, including:
• Electric Dough Playdate
• How to make a mini robot bug
• How to make your own LED trampoline