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  2. Computer fan control - Wikipedia

    en.wikipedia.org/wiki/Computer_fan_control

    A fan controller with LEDs indicating fan status and potentiometers and switches to control fan speeds Another method, popular with PC hardware enthusiasts, is the manual fan speed controller. They can be mounted in an expansion slot or a 5.25" or 3.5" drive bay or come built into a computer's case.

  3. Lighting control system - Wikipedia

    en.wikipedia.org/wiki/Lighting_control_system

    Lighting control system. A lighting control system incorporates communication between various system inputs and outputs related to lighting control with the use of one or more central computing devices. Lighting control systems are widely used on both indoor and outdoor lighting of commercial, industrial, and residential spaces.

  4. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    In cheaper and/or older models, a defrost cycle is controlled via a mechanical timer. This timer is set to shut off the compressor and fan and energize a heating element located near or around the evaporator for about 15 to 30 minutes at every 6 to 12 hours. This melts any frost or ice build-up and allows the refrigerator to work normally once ...

  5. Windmill vs. July: What’s the best air conditioner? - AOL

    www.aol.com/news/windmill-vs-july-best-air...

    The Windmill AC $319.00 at Amazon. The Windmill AC $319.99 at Best Buy. The Windmill AC $299.00 at Windmill air. Windmill, unlike July, has two types of window air conditioners: its original model ...

  6. Nearly Half of Cancer Deaths May Be Prevented With These ...

    www.aol.com/nearly-half-cancer-deaths-may...

    Nearly half of cancer deaths could be prevented with lifestyle changes, new research finds. An estimated 40% of all cancer cases and 44% of all cancer deaths in adults over 30 years old in the ...

  7. Fan (machine) - Wikipedia

    en.wikipedia.org/wiki/Fan_(machine)

    Fans are used to force air into low- and high-bypass jet engines, seen here on a Boeing 777. A fan is a powered machine used to create a flow of air. A fan consists of a rotating arrangement of vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor ...

  8. Traffic light control and coordination - Wikipedia

    en.wikipedia.org/wiki/Traffic_light_control_and...

    A junction for road vehicles and pedestrians controlled by traffic lights in the UK. The various vehicle and pedestrian movements are separated in either time or space for safety and efficiency. The normal function of traffic lights requires more than sight control and coordination to ensure that traffic and pedestrians move as smoothly, and ...

  9. Elevator - Wikipedia

    en.wikipedia.org/wiki/Elevator

    Elevator. Outside of typical elevators, shown in an office building in Portland, Oregon. This elevator to the Alexanderplatz U-Bahn station in Berlin is built with glass walls and doors, exposing the inner workings. An elevator ( North American English) or lift ( British English) is a machine that vertically transports people or freight between ...

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