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Not really.... Anything metal within 150mm affects the reading... If it were permanent, you could calibrate it in..I'm getting errors, that possibly could be caused by inteference, and I want to know if shielding is normally used, and can a Compass chip be used inside a Faraday cage?
Hi I and E,Not really.... Anything metal within 150mm affects the reading... If it were permanent, you could calibrate it in..
I used to 'do' a demonstration in an electric museum, where a round magnet was dropped down a tube of plastic, and it dropped straight through. Then drop
Hi N,I've got a terrible urge to go and find some pipe?![]()
The reverse is also true: If an AC current is is used with an electro magnet, then the disc will spin, as in electric meters.
Hi R,Only if it has a shading band or coil on the pole piece, to add a rotational element. They are called "shaded pole motors".
Back to the original question - a non-ferrous screen around the compass element should reduce electrical interference from other things without affecting the compass itself.
Copper or aluminium foil or fine mesh should work.
Hi G,I use a compass to aim my TV antenna in the correct direction according to TVFool. A cheep $1 compass causes me less trouble than a expensive compass. The expensive compass picks up metal so easy I need to be 20 ft away from all metal to get a good reading. $1 compass works fine 8 ft from metal antenna. If your compass chip sensitivity can be reduced it might work better.