[annie laurie]

Ping of possible interest

[kinoxi]

Tesla would be happy.

[GOPJ]

Didn't Tesla come up with this? Broadcast energy - no wires - kind of like radio?

[djf]

????

I have an electric toothbrush that charges without wires, just set it on the base.

Put a pickup coil with a diode in it and set it on a wire running AC, and you'll charge.

How much schooling exactly does it take to call yourself an engineer these days?

[jonrick46]

I would be concerned about the efficiency of energy transfer. Sounds like lots of energy would be used to charge little.

[Bluenose]

It sort of brings to mind the "Krell" from Forbidden Planet.

[Wuli]

"But to a nonresonant device, the radiation is undetectable."

If you are totally blind, light waves are undetectible. That does not mean they do not strike you, you just don't know it.

Various forms of energy receive no recognition of detection from humans, because we have no direct, active, concious detectors for them - like many cosmic rays. Yet, our bodies do receive and respond to those energies, sometimes with adverse results.

Like the on-again off again debate about the human affects of frequent, close-in contact with the energy waves responsible for cell phone communications, this new energy proposal will present legitimate questions about possible adverse affects on the human body, if not other living things as well. Such questions should not be dismissed without unbiased research.

[Rubber_Nose]

Of course you could always try one of these devices. Some copper plumbing parts and PVC, some wine bottles and plastic buckets, the wire from some old TVs, some plastic drain tile and tin-foil, and some microwave oven transformers. Put together properly it can make and big sparks. Just don't stand too close. Regards, Rubber_Nose

[DB]

4 to 10 megahertz isn't particularly "low frequency" for radio waves. It's been called Shortwave for a long time... Normal "AM" radio is 550 kHz to 1.6 MHz which is much lower in frequency.

[Centurion2000]

Now researchers at MIT have proposed a way to cut the cords by wirelessly supplying power to devices.

I guess someone was able to make heads or tails of Tesla's notes finally.

[Lancey Howard]

Nikola Tesla BUMP!

[conservatism_IS_compassion]

How much more practical is this than just putting a spring in your laptop and having the user turn a key to wind the thing up every 10 minutes?

[SunkenCiv]

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UNPLUGGED. Alternating current fed into a wire loop (blue) generates a field that induces currents in the coil (red, at left), creating a magnetic field that reaches a second coil (red) several meters away (at right), creating a local field that induces a current in the second loop (blue), lighting a bulb. -- Science

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