Electric eye

An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam. The device does not provide an image; only presence of light is detectable. Visible light may be used, but infrared radiation conceals the operation of the device and typically is used in modern systems. Originally systems used lamps powered by direct current or the power line alternating current frequency, but modern photodetector systems use an infrared light-emitting diode modulated at a few kilohertz, which allows the detector to reject stray light and improves the range, sensitivity and security of the device.

Examples

Highway vehicle counter

  • In the 1930s an electric eye vehicle counter was introduced in the US using two IR lamps set apart so that only cars and not pedestrians would be counted.
  • Electric eye (disambiguation)

    Electric eye is an opto-electronic means of sensing. It may also refer to:

  • Electric Eye (album), a 1984 album by Prodigal
  • Electric Eye (video), a 2003 compilation DVD by Judas Priest
  • Electric Eye (song), a 1982 song by Judas Priest
  • Electric Eye (band), a Psych-rock band from Norway
  • Electric Eye (video)

    Electric Eye is a compilation DVD by Judas Priest released in 2003 and certified Platinum by the RIAA. It features music videos, BBC performances, and the first official DVD release of a concert filmed in Dallas, Texas during the 1986 Fuel for Life Tour, previously released as Priest...Live! on VHS and LaserDisc.

    Track listing

    Music Videos

  • "Living After Midnight" (1980) – 3:33
  • "Breaking the Law" (1980) – 2:40
  • "Don't Go" (1981) – 3:20
  • "Heading Out to the Highway" (1981) – 3:48
  • "Hot Rockin'" (1981) – 3:07
  • "You've Got Another Thing Comin'" (1982) – 4:23
  • "Freewheel Burning" (1984) – 4:37
  • "Love Bites" (1984) – 4:04
  • "Locked In" (1986) – 4:02
  • "Turbo Lover" (1986) – 4:39
  • "Johnny B. Goode" (1988) – 4:29
  • "Painkiller" (1990) – 6:11
  • "A Touch of Evil" (1990) – 4:37
  • Live - Dallas, Texas 1986

  • "Out in the Cold" – 5:15
  • "Locked In" – 4:56
  • "Heading Out to the Highway" – 4:42
  • "Breaking the Law" – 2:30
  • "Love Bites" – 5:42
  • "Some Heads Are Gonna Roll" – 4:50
  • "The Sentinel" – 5:18
  • "Private Property" – 4:55
  • Podcasts:

    PLAYLIST TIME:

    Electric Eye

    by: Apparatjik

    I can see a point where all our futures meet.
    Where we are going, and every place we feel.
    Through all the static, I hear you calling.
    Please switch yourself off, don't keep me holding on.
    Sad as fire,
    It's your take to my mind.
    Now you have to go.
    I could be a soldier,
    I could be a humanoid.
    I could be an ion far away from home.
    I wanna feel you closer to me.
    I wanna hold you in my arms.
    I want to be a part of everything--
    I want to be a part!
    Fear that I see.
    Fear that I see.
    Fear that I see.
    Fear that I see.
    .......................




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