Hi, I'm new to the forum and what I have seen so far is very good.
My problem is that I want to detect a magnet that is rotating - sounds easy - well the magnet is 100mm away from any possible detection device. I have tried Hall effect sensors and the like but have had no joy - the magnet is just too far away. I thought of using an inductor - say 1mH coil and, although I do get a slight ripple, looking across the coil with a scope, my attempts to amplify this have been unsuccessful.
My application is to determine wind speed - the magnet is on the axis of a propeller that the wind turns. The magnet is diametrically magnetised - the bar is N - S on opposite sides, not the normal N - S on opposite ends so the magnetic field is rotating N-S-N-S.....etc so it should be possible to detect it.
Any help would be most appreciated - thanks
My problem is that I want to detect a magnet that is rotating - sounds easy - well the magnet is 100mm away from any possible detection device. I have tried Hall effect sensors and the like but have had no joy - the magnet is just too far away. I thought of using an inductor - say 1mH coil and, although I do get a slight ripple, looking across the coil with a scope, my attempts to amplify this have been unsuccessful.
My application is to determine wind speed - the magnet is on the axis of a propeller that the wind turns. The magnet is diametrically magnetised - the bar is N - S on opposite sides, not the normal N - S on opposite ends so the magnetic field is rotating N-S-N-S.....etc so it should be possible to detect it.
Any help would be most appreciated - thanks
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