2007-05-12 08:53:04 · 8 answers · asked by kirstie_ma 2 in Science & Mathematics ➔ Engineering
what do they do andf why are they used?
2007-05-12 08:57:04 · update #1
LED are a semi-conducting devices that have a junction which produces light when electricity flows through it.
LED's are extremely long lasting, and extremely efficient in converting electrical energy to light, much more than incandescent lightbulb, and still more than fluorescent tubes.
2007-05-12 09:00:36 · answer #1 · answered by Vincent G 7 · 1⤊ 0⤋
Honey, you can buy a cute sweatshirt with kittens on it for less than that...Just get the reguhler pepper shaker. Who am I kidding? Fresh ground black pepper is totally worth a light-emitting diode guiding feature on a pepper mill for $19.99 plus tax. GET IT! GET IT! GET IT!
2016-05-21 04:11:33 · answer #2 · answered by Anonymous · 0⤊ 0⤋
A light-emitting diode, is a semiconductor diod which glows when a voltage is applied, and they are every where in electronics.
2007-05-12 09:07:50 · answer #3 · answered by Magic 5 · 0⤊ 0⤋
Hi. Here you go...
http://www.answers.com/main/ntquery?s=LED&gwp=13you
2007-05-12 08:57:22 · answer #4 · answered by Cirric 7 · 0⤊ 0⤋
Those lights are everywhere, look at the light on your keyboard!
2007-05-12 08:57:04 · answer #5 · answered by oozahnawahtzyl 4 · 0⤊ 0⤋
correct
2007-05-12 08:56:16 · answer #6 · answered by Shadygoingson 3 · 0⤊ 0⤋
answered your own question...
2007-05-12 13:49:04 · answer #7 · answered by Rod Stewart 5 · 0⤊ 0⤋
dey r simply diodes.......
np,pn............
2007-05-12 09:01:48 · answer #8 · answered by sadanand_warty 1 · 0⤊ 0⤋