Light-emitting diode

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

LEDS may refer to:

  • LEDs, light-emitting diodes
  • Low-Emission Development Strategies and Plans, an advanced climate-resilient low emission development strategy
  • Life Events and Difficulties Schedule, a psychological measurement of the stressfulness of life events created by psychologists George Brown and Tirril Harris in 1978
  • See also

    Leeds, a city in West Yorkshire, England

    LEDS-150

    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.

    Podcasts:

    PLAYLIST TIME:

    Leds

    by: Optimus Rhyme

    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




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