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  2. Lighting control system - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_system

    A complete sensor consists of a motion detector, an electronic control unit, and a controllable switch/relay. The detector senses motion and determines whether there are occupants in the space. [9] It also has a timer that signals the electronic control unit after a set period of inactivity.

  3. Twilight switch - Wikipedia

    en.wikipedia.org/wiki/Twilight_switch

    Twilight switch. A twilight switch is an electronic component that allows the automatic activation of a lighting circuit when natural light drops in a given environment. Among a large number of uses, the most common is to enable automatic lighting of streets, roads, highways, roads, gardens, courtyards, etc., when sunlight drops below a certain ...

  4. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A passive infrared sensor ( PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give ...

  5. Motion detector - Wikipedia

    en.wikipedia.org/wiki/Motion_detector

    A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion. Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. They form a vital component of security, automated lighting ...

  6. i-Cybie - Wikipedia

    en.wikipedia.org/wiki/I-Cybie

    i-Cybie (爱赛比) is a robotic pet that resembles a dog. It was manufactured by Silverlit Toys Manufactory Ltd Hong Kong from 2000 to 2006. i-Cybie was developed for commercial distribution by Tiger Electronics. Outrageous International Hong Kong distributed the electronic pet from 2005 to 2006. The i-Cybie robotic dog responds to sound ...

  7. List of sensors - Wikipedia

    en.wikipedia.org/wiki/List_of_sensors

    Throttle position sensor. Tire pressure sensor. Torque sensor. Transmission fluid temperature sensor. Turbine speed sensor. Variable reluctance sensor. Vehicle speed sensor. Water-in-fuel sensor. Wheel speed sensor.

  8. Lightning detector - Wikipedia

    en.wikipedia.org/wiki/Lightning_detector

    A lightning detector is a device that detects lightning produced by thunderstorms. There are three primary types of detectors: ground-based systems using multiple antennas, mobile systems using a direction and a sense antenna in the same location (often aboard an aircraft), and space-based systems. The first such device was invented in 1894 by ...

  9. Autofocus - Wikipedia

    en.wikipedia.org/wiki/Autofocus

    Autofocus accuracy within 1/3 of the depth of field (DOF) at the widest aperture of the lens is common in professional AF SLR cameras. Most multi-sensor AF cameras allow manual selection of the active sensor, and many offer automatic selection of the sensor using algorithms which attempt to discern the location of the subject. Some AF cameras ...

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