Tiny generator turns vibrations into electricity

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onix @ Jul 6th 2007 2:20PM

What's new here is the size. There has already been lots of work on energy harvesting/scavenging (google this) and as some of you mention it manifestation in consumer products, Seiko kinetic watches and shake-activated flashlights.

The problem with size is that the amount of power harvested is generally proportional to the size. The fact that they were able to couple it to an accel is an accomplishment. The question is efficiency - how efficiently do they convert vibration energy into electrical energy.

Note also that anything that takes away vibration energy is a damping mechanism. This is why energy scavenging in shoes feels like walking on sand -- I'm exaggerating, but you get the point.

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