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Stress Test

Powering electronics with human motion.

Slideshow: Michael McAlpine sandwiches ribbons of PZT between layers of silicone or plastic.
Slideshow: Then attaches leads (shown here) to make a flexible device that generates electricity when bent.
Slideshow: These devices might one day power pacemakers or other implanted devices, bending back and forth as a patient’s lungs inflate and deflate.

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