Take a miniature Gyro-gen (link), which "applies gyroscopic precessional torque to directly convert the periodic kinetic energy of (human gait) into continuous torque that drives a rotary electric generator", and mount it on a long and semi- flexible sping mounted on your Beenie. The torque created by the exagerated motion of the spring attachment will drive the generator and hopefully generate enough electricity to run your personal wearable computing.
Please read the Gyro-Gen link before you fishbone.-- JesusHChrist, Apr 17 2005 Original idea Gyrocharger [JesusHChrist, Apr 17 2005] (?) Gyro-Gen http://www-csgc.ucs...ATION/Isaacs04.html [JesusHChrist, Apr 17 2005] This spring plays the same role that a resillient foam mount would for a gyro-gen, it stores energy from the system so that the energy can be adaptiveoly transfered to the gyroscope, which further stores energy, using some of it to spin and some to generate electricity.-- JesusHChrist, Apr 17 2005 Hmmm. The spring would have the opposite effect to that which you want: given that the gyro is effectively a damper which resists torque, it would simply dampen the motion of the spring. The only energy input is from the changing orientation of your head, and you'll do best to bolt the gyro directly to your skull to capture as much as poossible of this energy. Any intermediate devices will only uncouple the device and lose you energyTo take the extreme example: you're nodding your head vigorously; a gyro bolted to your skull will capture as much as poossible of this energy (and require you to use extra effort in the nodding); with your spring coupling, you'll nod your head and they gyro will remain relatively motionless. So, fishbone for that reason alone (aside from any reservations about gyroscopy in general!).-- Basepair, Apr 17 2005 random, halfbakery