Electricity from the air - Drayson's big idea [View all]
Electricity from the air - Drayson's big idea
Free energy from the air. It sounds like a fantasy but that is what the entrepreneur and former science minister Lord Drayson has just unveiled at London's Royal Institution.
He claims that a technology called Freevolt can be the power source for the "internet of things", allowing low energy devices from wearables to sensors to operate without being plugged in.
The technology involves harvesting radio frequency energy from existing wireless and broadcast networks, from 4G to digital television. Lord Drayson says it's a world first: "It doesn't require any extra infrastructure, it doesn't require us to transmit any extra energy, it's recycling the energy which isn't being used at the moment."
The technology was demonstrated in the lecture theatre at the Royal Institution, where Michael Faraday worked on electromagnetism in the 19th Century. Lord Drayson first showed how much radio frequency energy was in the room, and then used his Freevolt system to power a loudspeaker.
http://www.bbc.com/news/technology-34401616
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