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  2. Twilight switch - Wikipedia

    en.wikipedia.org/wiki/Twilight_switch

    By means of a light intensity sensor ( photoresistor, photodiode, phototransistor, etc.) that detects the amount of light that illuminates an environment, it triggers an electrical circuit that opens or closes the contacts of a mechanical relay or of a solid state relay. (power transistor, thyristor, triac, etc.), which activates the lighting ...

  3. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A PIR motion detector used to control an outdoor, automatic light. A camera trap with PIR motion detector. An indoor light switch equipped with PIR-based occupancy sensor [1] A PIR-based motion detector is used to sense movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically activated lighting ...

  4. 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 (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.

  5. Keep your garage secure with this wireless security sensor - AOL

    www.aol.com/article/lifestyle/2019/09/16/keep...

    This sensor is used to remotely monitor the status and temperature of your garage from a smartphone, tablet, PC or Apple Watch. Keep your garage secure with this wireless security sensor Skip to ...

  6. Light switch - Wikipedia

    en.wikipedia.org/wiki/Light_switch

    Shown here will be fastened to this recessed, non-metallic box, then a cover plate is installed. This "double gang" (two unit) installation uses non-metallic-sheathed cable and twist-on wire connectors. In electrical wiring, a light switch is a switch most commonly used to operate electric lights, permanently connected equipment, or electrical ...

  7. These Are the Best New Songs We Heard This Month - AOL

    www.aol.com/best-songs-heard-month-142900895.html

    “Rebecca Black, perhaps best known for the 2011 viral hit ‘Friday,’ is still making music, however now the playground isn’t at the school—it’s at the club. In ‘Sugar Water Cyanide ...

  8. Garage door opener - Wikipedia

    en.wikipedia.org/wiki/Garage_door_opener

    The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

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