A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, which emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.
An LED is often small in area (less than 1 mm2) and integrated optical components may be used to shape its radiation pattern.
Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light. Infrared LEDs are still frequently used as transmitting elements in remote-control circuits, such as those in remote controls for a wide variety of consumer electronics. The first visible-light LEDs were also of low intensity, and limited to red. Modern LEDs are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.
LEDS may refer to:
Leeds, a city in West Yorkshire, England
LEDS-150 Land Electronic Defence System is an active protection system, developed by Saab Avitronics, a South African subsidiary of the Swedish aerospace and defence company, Saab.
The system is able to counter most known threats against armoured vehicles with soft and hard kill methods.
LEDS-150 consists of laser warning sensors, an ADC-150 Active Defence Controller, a number of MCTS Munition Confirmation and Tracking Sensors, and High Speed Directed Launchers, HSDL, which allows the combination of soft- and hard-kill countermeasure deployment capability to the platform, optional displays, and interconnecting harnesses.
This system uses the Denel Dynamics Mongoose-1 missile to destroy the incoming threat in 5 to 15 meters distance from the protected vehicle. LEDS-150 covers all 360 degrees azimuth; its elevation coverage is from -15 to +65 degrees.
The system has been integrated on the MOWAG Piranha armoured personnel carrier.
The South African Army has funded much of the development of this system.
Extinguish LEDs
Visual displays get phased out, upgraded with ease
Jumper packin' baby, ten fingered USBs
You wanna megabyte this? Alright
But we might just to have fight it out over 88 Keys
A hundred bass lines from a swarm of Stumblebees (yeah!)
Buzzin' in your ear, made you thinking maybe these
Autobeats ain't exactly what they seeeeem!
It's a heavyweight scene the way we hold it
Every last data molecule's locked down and double bolted
Storm your local area network and fold it
Autograph your IP, track it and decode it
Spyware's got you kiddies begging for bandwidth
You sittin' with some Autobeats you know you can't stand with
We're sharper than the scissors those little kids ran with
This ain't Space Invaders one life is what I began with
If it were, I'd take 'em out by the pixel
Smack up the beat like my name is Matt Nickels
Pack up your grief, I don't need that stuff
Survive on AC Adapters and dope-ass cuts.
(hook)
Real life is a little more than you expected,
Too hectic, got you feeling all rejected
Run around spinning like your hard drive's infected
Feelin' disillusioned, down low and dejected
Unaffected, always been to eclectic
Can't believe that crazy cowboy that they elected
Password accepted
We never rock a beat unless it's wholly certified
No drum-machine, Grimrock bangs it out live
Don't take it outside like those thugs with guns
Take it to the stock market rockin' mutual funds
See, Powerthighs analyzes algorithms for fun
Spot him at the brain game, man you know that kid won
Dehydration photosynthesis, it's the Optimus
The antithesis of your every day
A lyricist who's disturbed, I'm not okay
I've got too many passwords in my brain
I need my memory erased, can't take it
I need these data ports wiped clean, left vacant
Can't live another day with this binary code
Cloggin' up my brain, slowing down my system getting old
Give me the alphanumeric antidote
And I swear that I'd delete every line that I wrote
Yo I'd be stoked, I can't write anyway
Melt me down to scrap metal, mold a couple ash-trays
Positronic pathways are getting worn
I'm absolutely certain I'm not getting reborn
(hook)
Real life is a little more than you expected,
Too hectic, got you feeling all rejected
Run around spinning like your hard drive's infected
Feelin' disillusioned down low and dejected
Unaffected, always been too eclectic
Can't believe that crazy cowboy that they elected
We got the fattest pipes, so you're in the net connected
Super-power servers can't leave them unprotected
Powerthighs never leave a bug this neglected
Password accepted
I'm sick of so many situations that I am faced with
I'm even bored of the drugs that I escape with
I clean my face with bleach twice a week
To replace it with fresh untapped energy
Cause I've been there see,
I've had no hope,
I've sat in the stadium watching people walk home
I've seen life crumble, I step up, I cope
I get by by releasing all these rhymes out my throat
My memory's stuck, leave trails of post-it notes
Filled with disconnected thoughts and witticisms that I wrote
When I felt broke, beaten down, totally stressed out
Thinking about my life without a mic and there's no doubt
Wouldn't wake up in the morning, I wouldn't eat
I wouldn't take a shower wouldn't blink, wouldn't breathe
Wouldn't skate, drink beer, date, or even think
Slowly decompose into dust