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  2. Occupancy sensor - Wikipedia

    en.wikipedia.org/wiki/Occupancy_sensor

    An indoor light switch equipped with PIR-based occupancy sensor [1] An occupancy sensor is an indoor device used to detect the presence of a person. Applications include automatic adjustment of lights or temperature or ventilation systems in response to the quantity of people present. The sensors typically use infrared, ultrasonic, microwave ...

  3. Limit switch - Wikipedia

    en.wikipedia.org/wiki/Limit_switch

    A limit switch with a roller-lever operator; this is installed on a gate on a canal lock, and indicates the position of a gate to a control system A limit switch mounted on a moving part of a bridge In electrical engineering , a limit switch is a switch operated by the motion of a machine part or the presence of an object.

  4. Manual override - Wikipedia

    en.wikipedia.org/wiki/Manual_override

    A manual override (MO) or manual analog override (MAO) is a mechanism where control is taken from an automated system and given to the user. For example, a manual override in photography refers to the ability for the human photographer to turn off the automatic aperture sizing, automatic focusing, or any other automated system on the camera. [1]

  5. Dimmer - Wikipedia

    en.wikipedia.org/wiki/Dimmer

    A common dual dimmer module used in stage lighting A dimmer. A dimmer is a device connected to a light fixture and used to lower the brightness of the light.By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output.

  6. Emergency override system - Wikipedia

    en.wikipedia.org/wiki/Emergency_override_system

    The Local Access Alert (also known as Local Access System or Emergency Override System) is a system designed to warn radio stations, television stations, cable television broadcast feeds or satellite signals of impending dangers such as severe weather and other civil emergencies.

  7. Train stop - Wikipedia

    en.wikipedia.org/wiki/Train_stop

    A signal with associated trip arm in the raised position (circled) Part of a railway signalling system, a train stop, trip stop or tripcock (sometimes called a tripper) is a train protection device that automatically stops a train if it attempts to pass a signal when the signal aspect and operating rules prohibit such movement, or (in some applications) if it attempts to pass at an excessive ...

  8. SawStop - Wikipedia

    en.wikipedia.org/wiki/SawStop

    SawStop is an American table saw manufacturer headquartered in Tualatin, Oregon.The company was founded in 2000 to manufacture table saws that feature a patented automatic braking system that stops the blade upon contact with skin or flesh.