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  2. Twilight switch - Wikipedia

    en.wikipedia.org/wiki/Twilight_switch

    A twilight switchis an electronic componentthat allows the automatic activation of a lighting circuit when natural lightdrops 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 level (e.g.: a from ...

  3. Ambient light sensor - Wikipedia

    en.wikipedia.org/wiki/Ambient_light_sensor

    An ambient light sensor is a component in smartphones, notebooks, other mobile devices, automotive displays and LCD TVs. It is a photodetector that is used to sense the amount of ambient light present, and appropriately dim the device's screen to match it. This avoids having the screen be too bright when the user's pupils are adapted for vision ...

  4. Photodiode - Wikipedia

    en.wikipedia.org/wiki/Photodiode

    A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. [1] It produces an electrical current when it absorbs photons. This can be used for detection and measurement applications, or for the generation of electrical power in solar cells.

  5. 'Bright and reliable': These motion-sensor solar security ...

    www.aol.com/lifestyle/bright-reliable-motion...

    It's even better when you can find solar-powered ones that actually work — that are eco-friendly, wireless, fuss-free and recharge on their own. We found some that are super-popular and they're ...

  6. Motion detector - Wikipedia

    en.wikipedia.org/wiki/Motion_detector

    A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection). 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 control, home control, energy efficiency ...

  7. Twilight Sentinel - Wikipedia

    en.wikipedia.org/wiki/Twilight_Sentinel

    Automatic headlight control system. Application. Exterior lighting control. Twilight Sentinel is an automatic headlight control system developed by General Motors (GM) for use in their vehicles. The system uses a photoelectric cell to sense outside light conditions and automatically control the vehicle's exterior lights.

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