And you thought Uyoku sound trucks, political screamers on PAs and Bosozoku were totally useless...
New power source: wall vibrations
November 13, 2003 / The Christian Science Monitor
Imagine using a computer that runs on energy generated from your building's wall and window vibrations. Masayuki Miyazaki, a senior researcher at Hitachi Co. Ltd.'s central lab in Tokyo, is trying to do just that... a tiny generator that converts building movements into electricity, creating enough energy to run a temperature or light sensor once an hour...