View Full Version : bike light powered by eddy currents

03-04-2012, 11:39 PM
Has anyone seen this awesome idea for a light?
Magnic Light (http://www.kickstarter.com/projects/dynamodirk/magnic-light-get-new-energy?ref=live) (kickstarter site)

Basically, Magnic Light is a bike light that uses eddy currents induced in a rim (with no actual rim contact) to produce electricity for an LED. The creators claim that the braking effect is very small.
There are probably a lot of folks on the forum with more knowledge in physics/engineering than me who could give a better explanation of how it works and whether it is a feasible replacement for battery powered lights...

03-05-2012, 02:55 AM
Interesting idea...it looks like their funding goal is close as well.

03-05-2012, 06:47 AM
Pretty cool. I am not sure how much energy can be derived (although I can I can calculate it) for a headlight for instance. Looks like enough for warning lights though,

Clean solution. Don't run it on your race bike it will slow you down :)

03-05-2012, 07:29 AM
Fantastic idea, he will get the money or sure.