Goodbye Wires…

#1 KoanYorel

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Posted 08 June 2007 - 10:04 AM

<img src='/images/misc/cupofcoffee.gif' style='float:right' vspace='8' hspace='8'> Goodbye wires… MIT team experimentally demonstrates wireless power transfer, potentially useful for powering laptops, cell phones without cords. Imagine a future in which wireless power transfer is feasible: cell phones, household robots, mp3 players, laptop computers and other portable electronics capable of charging themselves without ever being plugged in, freeing us from that final, ubiquitous power wire. Some of these devices might not even need their bulky batteries to operate. by Franklin Hadley, Institute for Soldier Nanotechnologies June 7, 2007 <div class='newslinks'><img src='http://www.bleepingcomputer.com/forums/public/style_images/1/cs_page.gif'> Link: <a href='http://web.mit.edu/newsoffice/2007/wireless-0607.html' target='_blank'>The key: Magnetically coupled resonance</a> </div>

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#2 boopme

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Posted 08 June 2007 - 03:10 PM

Tell them to huury it up ! I need this!!

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#3 ddeerrff

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Posted 08 June 2007 - 03:41 PM

There has GOT to be more here than the layman articles are saying as this is nothing new. It's simply a resonant air-core transformer. One article I saw indicated 40% efficiency. That's *terrible*.

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#4 Russ Bellew

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Posted 08 June 2007 - 04:33 PM

Am I missing something? I don't read anything that indicates progress beyond Nikola Tesla's experiments of a hundred years ago.

I also missed an indication of operating frequency. The article just says that it operates "at MHz frequencies". That's a mighty big range -- presumably from 1 Mhz to 1 GHz.

Is this a case of poor reportage of a brilliant breakthrough, or does the experiment itself demonstrate nothing new?

This post has been edited by Russ Bellew: 08 June 2007 - 04:39 PM

#5 ddeerrff

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Posted 08 June 2007 - 04:56 PM

It's got to be in the low-MHz range. Once they get out of near field, their 'magnetic wave' rapidly becomes ordinary electomagnetic - which they indicate is no good. Higher frequencies would mean getting into far field quicker.

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#6 cowsgonemadd3

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Posted 11 June 2007 - 01:54 PM

Has anyone seen the thing on "thinkgeek.com" about the wireless power cords? They use microwaves and has a range of what 200ft?
I wish they could do wireless power because with it we could change the car industry forever. With a good efficiency.

Not to mention it might get me to buy one of those wireless mice ha ha.

This post has been edited by cowsgonemadd3: 11 June 2007 - 01:55 PM

#7 Digital Brian

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Posted 19 October 2007 - 03:22 PM

I dont believe it, well I dont believe it is possible to transfer power without wires without posing a danger to people in the same room, what about pacemakers? I just dont think this is a very good idea.