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4/04 © MIT-ML Shake-Driven Flashlights Weighs150 grams and produces 200 mW with a steady shake at its mechanical resonance (roughly 3.3 Hz) - 2 mW/cm 3 Dual microgenerator in AAA <strong>for</strong>m factor - 28 μW @ 70 Hz Yuen et al, CU Hong Kong, 2005 (note that AAA battery would last 15 years) JAP 24
4/04 © MIT-ML Commercial Microgenerators The PMG7 is designed to resonate at mains frequency (50 or 60Hz) with a bandwidth of 0.2Hz giving excellent per<strong>for</strong>mance on any AC synchronous motor powered equipment. Output is from 0.1mW to several mW power depending on the level of vibration (eg up to 5mW at 100mg or 400μW at 25mg). FerroSolutions, Cambridge MA Perpetuum, Southampton UK Both Magnetic JAP 25
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