In theory it is simple: a magnet moves inside a coil and generates voltage by induction.
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I updated the gallery with my first test coil winded on a biro with magnet inside.
I hooked it to my oscilloscope to check if it works.
TODO: wind a better coil with more windings and check the voltage coming out.
I winded a coil on a biro tube. The coil is about a meter wire. I get 0.7 volts measured with my oscilloscope using a 8 x 10 mm neodym magnet inside.
I have to find a tube which has an inner width of about 9 mm and wind a more thicker coil around it to get more volts.
Today I ordered cylindrical magnets to experiment with. Now I have to find a plastic tube in which they fit. Then I can do some tests with the magnets and coils.
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