3 ms·
The NPR article[1] gives some more information on what it is. Apparently, it's ultrasonic piezoelectric charging. My guess is that it's using a resonance freque
by zheshishei 12y ago
The NPR article[1] gives some more information on what it is. Apparently, it's ultrasonic piezoelectric charging. My guess is that it's using a resonance frequency approach to vibrate the crystals.
1: http://www.npr.org/2011/08/23/139854129/young-entrepreneur-has-a-better-idea-now-what http://www.npr.org/2011/08/23/139854129/young-entrepreneur-h...