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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. 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 ...

  5. Unplug these appliances that hike your electricity bill - AOL

    www.aol.com/finance/unplug-appliances-hike...

    Unplug fans when not in use, and switch to a fan with a timer so that it doesn't stay on all night while you sleep. evrim ertik / Getty Images/iStockphoto 6. 24/7 Lights

  6. Variable-frequency drive - Wikipedia

    en.wikipedia.org/wiki/Variable-frequency_drive

    A variable-frequency drive ( VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, or drive) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the input electricity. Depending on its topology, it controls 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. 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 ...

  9. Fire alarm control panel - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_control_panel

    A single-zone alarm control panel. A fire alarm control panel ( FACP ), fire alarm control unit ( FACU ), fire indicator panel ( FIP ), or simply fire alarm panel is the controlling component of a fire alarm system. The panel receives information from devices designed to detect and report fires, monitors their operational integrity, and ...

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