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White Leds
What is an LED? It's a light-emitting diode; it is used in several kinds of electronic devices. What an LED does is it's basically a semiconductor that puts out an electrical current. You know LEDs that are used in flashlights, ultraviolet lights, and infrared. Plus the Ultraviolet LED can be used as a growth light which will help plants in photosynthesis.
First invented in 1907 in the Marconi Labs by H.J. Round, no practical use was found for it for several decades. There were also other scientist who were flirting with the new discovery, including Oleg Vladimirovich Losev of Russia and Rubin Braunstein who worked at Radio Corporation of America. Also Bob Biard and Gary Pittman of Texas Instruments put a patent in for the infrared light-emitting diode in the year of 1961.
In 1962 the first red or visible-spectrum was discovered by a General Electric scientist Nick Holonyak Jr. This earned him the name of "Father of the Light-Emitting Diode." And a student of his, M. George Craford, created the first yellow light-emitting diode in 1972.
The first blue light-emitting diode was developed by Shuji Nakamura. It is known for its high-brightness. Then in 1995 Alberto Barbieri showed off the first white light-emitting diode. As you can tell light-emitting diodes are getting not only more developed but also more efficient.
What all are light-emitting diodes used in? They are used in everything from televisions, to radios, telephones, calculators, and even watches. With the advancements in the technology of light-emitting diodes it's easy to imagine what they will be used in next.
The whole idea behind this invention is very hard to understand when you read all the technical information about it. But you can tell they have been studied for many years and changed and upgraded to make them better.
In fact in recent years they have been using photonic crystal with light-emitting diodes and this has cut down on back reflections, advancing the technology even further. It's not hard to imagine a scientist in their lab trying to make a product better. It's no different with light-emitting diodes, and they are constantly trying to upgrade the product to make it better.
LEDs have been around for over a hundred years now, and if you read and look at pictures of the first samples of light-emitting diodes you will just see how much more advanced and talented these scientist are in their further development.
Marktech Optoelectronics http://marktechopto.com is a supplier of LEDs and other optoelectronics New York. Billings Farnsworth is a freelance writer.
Where can I buy single LEDs in Seattle?
Any recommendations on stores in and around Seattle when I can buy individual LEDs (say white, blue etc)..
Something like those electronics markets in China/Hongkong would be awesome.
I have heard good things about this site http://www.superbrightleds.com/leds.htm I have never bought from them personally but they are rated high from what I have read....Great selection too
American DJ Theatrix Pro LED 48
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 LED Human Sensor Lamp White Light Bulb  US $10.99
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 Water Proof 2x 20" 12V White Under Car LED Lights Bar US $.49
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 5M 300 LEDs LED Light Strip 3528 SMD White Color 60LED/M Lamp strip Hot sale US $9.14
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 10X Eye Loupe Magnifier Repair Watch White LED Light 100% New US $6.63
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 2 x 230V 104 Led 12W PURE WHITE PAR30 High Power Ceiling Plastic Light Bulb E27 US $16.09
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Another great place to shop for White Leds products is Amazon. They have more than just books!
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Cuisinart CPK-17 PerfecTemp 1.7-Liter Stainless Steel Cordless Electric Kettle
$185.00 This Cuisinart Perfectemp Cordless Electric Programmable Kettle offers latest innovation for this product category%2E Heating water will never be easier with this handsome brushed stainless steel kettle%2E Great for making tea%2C hot chocolate or instant soups%2E It will quickly bring 1%2E75 quarts of water to a boil and then turn itself off%2E... |
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Sunbeam 5891 2-Pound Programmable Breadmaker, White
$54.59 Stunning almost 18-24 high very full plumes....... |
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PUR 3 Stage Vertical Faucet Mount with Filter
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It Might Get Loud
$10.39 The Sony DVD It Might Get Loud is an epic, exhilarating backstage pass into the world of rock stars. There are guitar players, and then there are rock stars. Over the course of one day, three generations of electric guitar phenoms come together, crank up their amps, and let it roll.Documentarian Davis Guggenheim gives us so much more than an all-star jam session (that alone would make even the gna... |
![It Might Get Loud [Blu-ray]](http://ecx.images-amazon.com/images/I/51LCFdm9U7L._SL75_.jpg)
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It Might Get Loud [Blu-ray]
$17.99 Three generations of rock guitarists come together for It Might Get Loud, a 2009 documentary directed by Davis Guggenheim (An Inconvenient Truth). These are not just your garden-variety guitar gods: Jimmy Page, in his mid-'60s at the time of the film, founded Led Zeppelin, who dominated the 1970s following the breakup of the Beatles. As a member of U2, 48-year-old David Evans, better known as the ... |
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Rockabye Baby! Lullaby Renditions of The Beatles
$10.77 No one will be able to say for sure whether Lullaby Renditions of the Beatles will successfully "glide your little one across the universe, through an octopus's garden, and send them into a slumberland of strawberry fields," as it says it will on the back on the disc, but one thing it won't do is bonk you over the head with the sub-par production you might expect from a novelty disc. The latest CD... |
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White Trash
$0.99 ... |
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Black Sabbath: Never Say Die
Recorded live in 1978, this VHS showcases Black Sabbath at their best, performing "Symptom of the Universe," "War Pigs," "Snow Blind," "Never Say Die," "Black Sabbath," "Dirty Women," and much more!... |
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40 Laser Finger Beams Bright LED finger lights for raves or other party occasions
$1.40 These finger lights can be used for many occasions to have lots of fun with. They are very popular at raves, birthday parties, and many other events that people attend. The finger lights are bright and have a long life and the batteries are replacable. They have an easy push button to turn on and off. You will receive 40 super bright finger lights. Each package will contain 4 finger lights each... |
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SYMA S108G 3.5 CH Infrared Mini Radio Controlled Marine Cobra Helicopter Gyro
$21.99 This is the Newest Mini Helicopter by Syma. The Electric Co-axial Micro helicopter series is suited for both the beginner and the advance pilot, anyone can enjoy it with the first flight.... |
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