Energy Harvesting for Mobile Computing Joe Paradiso Responsive ...

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Johnson, et al., Transmitter Circuit, US Patent No. 3,796,958, March 12, 1974. Zenith ‘Space Command” Self-Powered Buttons Crisan, A. (Compaq), Typing Power, US Patent No. 5,911,529, June 15, 1999 Pipi "Kodomo No Omocha" pager toy
4/04 © MIT-ML Voltage (V) 14 12 10 8 6 4 2 0 -2 -5.6 Self-powered buttons 16.4 Strike Occurrence Tank Capacitor Voltage 38.4 60.4 82.4 104 126 3 Volt Regulator Output 148 170 192 214 • ~0.5 mJ at 3 Volts per push • Sends 12-bit RFID 12 x throughout floor (50 ft.) • No need <strong>for</strong> battery, wire… Mark Feldmeier 236 Time (msec) Serial ID Code 258 280 302 324 346 368 Spring 2001 390 412 434 JAP 43
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