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How FitBit Works

Get Your Bits Fit FitBit is evolving, from both a hardware and software perspective. In October 2011, the clip itself was upgraded and renamed the FitBit Ultra. The Ultra has the same features as the original FitBit, with one major addition: an altimeter. With the altimeter, Ultra knows how much elevation you lose or gain throughout a day. That's valuable information because inclines are hard work. For exam ...

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How Fax Machines Work

Basic Idea Behind Fax Machines Most of the early fax machine designs involved a rotating drum. To send a fax, you would attach the piece of paper to the drum, with the print facing outward. The rest of the machine worked something like this: There was a small photo sensor with a lens and a light. The photo sensor was attached to an arm and faced the sheet of paper. The arm could move downward over the sheet ...

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How Near Field Communication Works

Building Up to NFC Back in 2004, three big companies -- Nokia, Sony and Philips -- got together with the goal of establishing a standard for near field communication technology. While these companies worked to standardize NFC, the technology that makes it possible dates back much further. And it all begins with the relationship between magnetism and electricity. When electrons flow through a conductor, they ...

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How Noise-canceling Headphones Work

Electrostatic and Dynamic Transducers To hear what's recorded on a record, cassette, CD, DVD or MP3 player, data stored on the medium must be converted into sound waves. This requires that the stored information be turned into an electrical signal, which then must pass through a transducer to convert the transverse electrical wave into a longitudinal sound wave that the ear can interpret. Speakers play the ...

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How the Dyson Bladeless Fan Works

The Mechanics of the Air Multiplier There are blades in the fan -- you just can't see them. The pedestal hides the blades. A motor rotates nine asymmetrically aligned blades to pull airinto the device. According to Dyson, these blades can pull in up to 5.28 gallons (about 20 liters) of air per second. The air flows through a channel in the pedestal up to the tube, which is hollow. The interior of the tube a ...

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