The LED: History and How to Build One



          

MAKE presents: The LED from make magazine on Vimeo.

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Take a tour through the world of the light-emitting diode. Learn – who invented it, how to use it, and how to make your own.

Collin Cunningham: People are fascinated by light. I mean just glancing over at a display of flashing lights can grab my attention. Do you ever remember sitting around a campfire? Staring at the flames and just being totally transfixed, almost like if you’re watching TV. It’s comforting, and it can even by hypnotic. Recently, technology has made creating light a whole lot easier to do. For that, we have this little guy to thank. The light emitting diode, or LED for short.

LEDs have a lot of different uses, from a simple power on indicator to traffic signals. LEDs use about ten percent of the energy of a traditional light bulb, and they can last about thirty times longer. That makes them a pretty big hit with businesses looking to do large scale visual communication.

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