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Windmeter for Android
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Here is the first test of my Android Windmeter.
It works with two small magnets attached to the anemometer axis and rotating above the smartphone's magnetometer.
This produces a very small fluctuation of the magnetic field. When applying a fast fourier transform you can get the rotation speed.
Then the App allows to calibrate the speed using the GPS and display it on a gauge.
Well, see it into action :
https://www.youtube.com/watch?v=jA16slSEuuM
It works with two small magnets attached to the anemometer axis and rotating above the smartphone's magnetometer.
This produces a very small fluctuation of the magnetic field. When applying a fast fourier transform you can get the rotation speed.
Then the App allows to calibrate the speed using the GPS and display it on a gauge.
Well, see it into action :
https://www.youtube.com/watch?v=jA16slSEuuM
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