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How energy harvesting has come of age

Perpetual motion machines have been the subject of ridicule for hundreds of years, but there is plenty of scope for harvesting small amounts of energy from various sources for performing useful tasks. Jon Severn reports of how technological developments are presenting new opportunities for low-powered wireless electronic devices.
Wednesday 12 September, 2007 12:40 PM

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"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible" - Freeman Dyson