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  2. Light-emitting diode - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode

    This gives drivers behind more time to react. In a dual intensity circuit (rear markers and brakes) if the LEDs are not pulsed at a fast enough frequency, they can create a phantom array, where ghost images of the LED appear if the eyes quickly scan across the array. White LED headlamps are beginning to appear.

  3. Standby power - Wikipedia

    en.wikipedia.org/wiki/Standby_power

    Standby power, also called vampire power [1], vampire draw, phantom load, ghost load, or leaking electricity, refers to how electronic and electrical appliances consume electric power. At the same time, they are switched off (but are designed to draw some power) or in standby mode. It only occurs because some devices claim to be "switched off ...

  4. DMX512 - Wikipedia

    en.wikipedia.org/wiki/DMX512

    Use of the three-pin XLR in this context firstly presents a risk of damage to the lighting equipment should an audio cable carrying 48-volt phantom power be accidentally connected. Three-pin XLR designed for audio applications rather than DMX512 communications may also lead to signal degradation and unreliable operation of the DMX network.

  5. Railway signal - Wikipedia

    en.wikipedia.org/wiki/Railway_signal

    Railway signal in Ploiești West railway station, Romania. This type of signal is based on the German Ks signals. The signal head is the portion of a colour light signal which displays the aspects. To display a larger number of indications, a single signal might have multiple signal heads.

  6. North American railroad signals - Wikipedia

    en.wikipedia.org/.../North_American_railroad_signals

    As of 2008 and as with all U.S. railroads, CSX is slowly replacing all of the remaining CPLs on its system with contemporary vertical color light LED signals. The signals on the old Alton Railroad have also been almost entirely replaced as have many of the CPL dwarfs at the two Chicago terminals. The sole exception is the Staten Island Railroad ...

  7. Phantom circuit - Wikipedia

    en.wikipedia.org/wiki/Phantom_circuit

    A phantom group is composed of three circuits that are derived from two single-channel circuits to form a phantom circuit. Here the phantom circuit is a third circuit derived from two suitably arranged pairs of wires, called side circuits, with each pair of wires being a circuit in itself and at the same time acting as one conductor of the ...

  8. UVB-76 - Wikipedia

    en.wikipedia.org/wiki/UVB-76

    UVB-76 - "The Buzzer", recorded on 10 August 2022. The station is commonly known as "The Buzzer" [7] in both English and Russian (Russian: Жужжалка).From its first voice transmission in 1997 to 2010, the station identified itself as UZB-76 [8] [9] (Russian: УЗБ-76).

  9. Category:Telecommunications techniques - Wikipedia

    en.wikipedia.org/wiki/Category:...

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