wireless power

Let's face it - the only reason anyone ever reads Scientific American is to see how "shiny" the future is going to be.

wireless power

Postby TerraFrost » Tue Jun 26, 2007 3:37 pm

The experimental setup consisted of two 60cm (2ft) diameter copper coils, a transmitter attached to a power source and a receiver placed 2m (7ft) away and attached to a light bulb.

With the power switched on at the transmitter, the bulb would light up despite there being no physical connection between the two.

Measurements showed that the setup could transfer energy with 40% efficiency across the gap.

The bulb was even made to glow when obstructions such as wood, metal and electronic devices were placed between the two coils.

read the rest

Reading that kinda reminded me of EBR-I, which, to quote from wikipedia.org...

At 1:50pm on December 20, 1951 it became the world's first electricity-generating nuclear power plant when it produced sufficient electricity to illuminate four 200-watt light bulbs.

Of course, nuclear power can do a bit more then light up light bulbs, now. Posts on slashdot.org suggest that doing it wirelessly in the method the BBC article discusses, is a bit less feasable...

Incidently, someone on slashdot.org made the following observation about wacom tablets:

Wacom tablets use a patented electromagnetic resonance technology. Since the tablet provides power to the pen through resonant coupling, no batteries or cords are required. As a result, there are no batteries inside the pen that will run down and need to be replaced, creating a long and virtually maintenance free lifespan.
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