Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Resident parking only.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.

user:
pass:
register,


       

Automatic watch battery

 Retrofit to make your cheap quartz watch automatic
  (+7)
(+7) 		  [vote for,
against]

A lot of quartz watches use little button batteries to power them. A lot of fancy watches use a rotor to harvest the energy of flailing human limbs.

This device has the form factor of a standard watch battery button cell. Most of the interior is used to house an eccentric rotor, which charges the remaining stub of battery.

—pocmloc, Jan 26 2018

Please log in.
If you're not logged in, you can see what this page looks like, but you will not be able to add anything.
Short name, e.g., Bob's Coffee
Destination URL. E.g., https://www.coffee.com/
Description (displayed with the short name and URL.)






       funny, and with a piezoelectric ratchet and pawl
—beanangel, Jan 26 2018
   

       In principle OK, but a radiothermal or Beta-capture cell would be way cooler* .   

       *In a metaphorical sense. Obviously, radiothermal batteries get quite warm in normal operation.
—8th of 7, Jan 26 2018
   

       This could actually work. The available power would be (very roughly) dependent on the square of the diameter of the rotor - so maybe 1/20th that available from a conventional full-diameter rotor, but that's plenty for a quartz.
—MaxwellBuchanan, Jan 26 2018
   


 

back: main index
business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle