I head about, a football which during the day can be used like a football and then at night used as a light.
I have always liked the idea of kinetic energy and always wanted things like kinetic energy watches. However the light ball really got me thinking about the LED lights on my Diabolo.
Kinetic energy on a diabolo is not a problem, so some of it could really be used for something else, like to keep a LED kit going almost endlessly?
I thought this must be done right? But from what I can find there are no LED kits or Diabolos which actually use kinetic energy at all. I did find a yoyo which doubles as a charger for your phone. If you know of one, do let me know as I’m considering prototyping one out of a kinetic wheel or something else.
Of course not as noble as the light ball but could be interesting?
