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Every time someone walks over one of the special kinetic tiles installed in the 1,200-pupil Simon Langton Boy’s Grammer School in Caterbury, England, they generate electricity which is harvested by a passive energy harvesting system. With a peak generation capacity of just 100W, over the course of a year the 12mof tiles won’t harvest that much energy; enough to power a standard light bulb for a couple of months, or fully charge 850 mobile phones.

How it Works

While it’s an idea that has been around for a while, with the increasing number of deployments of sensors to measure the environment both inside and outside buildings, as well as larger-scale “smart city” programmes, power is starting to be needed in the strangest of places. Places where wiring the sensors into the existing power grid would be difficult or costly. Passive energy harvesting is an interesting idea that could be used to power those sensors, and the smarter cities that are driving those deployments. So perhaps its an idea whose time has finally come?

Alasdair Allan

Alasdair Allan is a scientist, author, hacker, tinkerer and co-founder of a startup working on fixing the Internet of Things. He spends much of his time probing current trends in an attempt to determine which technologies are going to define our future.


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