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  2. Brushless DC electric motor - Wikipedia

    en.wikipedia.org/wiki/Brushless_DC_electric_motor

    Small cooling fans in electronic equipment are powered exclusively by brushless motors. They can be found in cordless power tools where the increased efficiency of the motor leads to longer periods of use before the battery needs to be charged. Low speed, low power brushless motors are used in direct-drive turntables for gramophone records. [13]

  3. These are the top 100 Valentine’s Day gifts, according to Amazon

    www.aol.com/lifestyle/best-valentines-day-gifts...

    Amazon's annual list of the 100 best Valentine's Day gifts includes options for men, women, and kids.

  4. Lite-Brite - Wikipedia

    en.wikipedia.org/wiki/Lite-Brite

    The Lite-Brite LED Flat Screen currently sells at MSRP $10, comes in several colors, is LED lit, and is portable, running on three AA batteries. [ needs update ] The Lite-Brite 3D cube (called the Four-Share Cube) was LED-lit on four of the six sides of the cube, allowing a child to play with friends or save three of their designs while working ...

  5. Hand fan - Wikipedia

    en.wikipedia.org/wiki/Hand_fan

    Handheld Brise fan from 1800. A handheld fan, or simply hand fan, is a broad, flat surface that is waved back-and-forth to create an airflow. Generally, purpose-made handheld fans are folding fans, which are shaped like a sector of a circle and made of a thin material (such as paper or feathers) mounted on slats which revolve around a pivot so that it can be closed when not in use.

  6. Fan (machine) - Wikipedia

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

    A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating 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, or runner. Usually, it is contained within some form of housing ...

  7. 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.

  8. Battery pack - Wikipedia

    en.wikipedia.org/wiki/Battery_pack

    Lead-acid automobile battery pack consisting of 28 Optima Yellow Tops Lithium-ion battery pack for Lucid Motors. A battery pack is a set of any number of (preferably) identical batteries or individual battery cells. [1] [2] They may be configured in a series, parallel or a mixture of both to deliver the desired voltage and current. The term ...

  9. Centrifugal fan - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_fan

    A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel).

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