Example 1 here.
YT search.
The keys seem to be: 1) Use a big magnet, 2) the motor that is being driven by the magnet with nails should output more power than the motor being driven.
I wonder if they work or it's just a gimmick. If it works it would be merely a proof of concept to drive an LED...
Earth Hour first started as a lights-off event in Sydney, Australia, back in 2007 — I was there and participated. Since that day, it's grown to engage more than 180 countries and territories around the world. Earth Hour 2018 is on the 24th of March 2018, at 8:30 pm local time; this means your...
January 5th, 2017
By Carolanne Wright
Contributing writer for Wake Up World
If engineers at the University of Wisconsin-Madison have anything to say about sustainable energy, we may soon be generating electricity by the simple task of walking. The ultimate in green design, the team has...
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