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Wireless Electricity

Say goodbye to annoying charger cables, and welcome the future of electrical charging; wireless energy transfer.

This marvel of science and technology was first invented by Nikola Tesla in 1890, with his “World Power” towers that unfortunately didn’t quite match up to his vision of free global electricity. Ultimately, Tesla’s idea laid the foundation and opportunity for modern scientists to perfect his design.

The first iteration of these wireless devices is called Inductive Coiling.

Not dissimilar to the size and appearance of a mousepad, this coil can transmit wireless electricity to a distance of a few inches. Nothing substantial, but perfect for cellphones, MP3 players, cameras, etc.

The next step up from Inductive Coiling is Radio-Frequency Harvesting.

While not as efficient transmitters as inductive devices, their power and distance is much greater; averaging around 85 feet of energy harvesting. This method of wireless electricity transmits low-voltage currents, which could charge multiple devices with minimal battery needs for an indefinite amount of time.

The third advancement in wireless energy transfer is called Magnetically Coupled Resonance.

It’s the most efficient method on this list, and can power an entire room full of electronic devices, both battery-dependent and wire powered units. MIT Assistant Professor and 2008 MacArthur genius-grant winner Marin Soljacic, has dubbed it “WiTricity”.

An early developer of this technology, Soljacic explained in an interview with Fast Company magazine the basics of how his device works. He likened it to tuning the strings on a guitar. Both the wireless provider and the receiver must be tuned to the same frequency, or else nothing will happen. Similar to the acoustics of sound travelling across a room, so to can magnetic resonance launch an electrical response to a receiver far away, without emitting harmful electrical rays to humans.

A variety of companies are strenuously working to introduce this groundbreaking technology to the masses, effectively eliminating our ancient need for plug-in cables and cords.

Currently, Inductive Coil devices have successfully gone mainstream, with Nokia manufacturing their newest smartphones to operate with wireless electrical chargers.

In the years to come, technology will advance to the Magnetic Resonance stage, and our living rooms will finally transform into the efficient and aesthetic living quarters we desire them to be.

Sources: www.fastcompany.com/1128055/wirelesselectricityhereseriously

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