Ultra Low Power Meets Energy Harvesting

Macro-scale energy harvesting technologies in the form of windmills, watermills  and passive solar power systems have been  around for centuries. Now, as designers  seek to cut the cords, they turn to microenergy harvesting systems that can scavenge milliwatts from solar, vibrational,   thermal and biological sources. However,  understanding ultra-low power from the  sourcing side brings challenges as harvested  power derived from ambient sources tends  to be unregulated, intermittent and smal