Ever thought of doing away with that your "I pass my neighbour generating set" due to the terrible noise and at the same trying to be independent of the PHCN.
Recently, researchers in Germany have have built shoe-sized devices that can harvest power from the act of walking.
The technology could be used to power wearable electronic sensors without the need for batteries.
There are two separate devices: a "shock harvester" that generates power when the heel strikes the ground and a "swing harvester" that produces power when the foot is swinging.
They could also form the basis of a self-lacing shoe for the elderly.
Details of the advance are outlined in the journal Smart Materials and Structures.
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