this may be more of a geometry question than an EE one, but i'll ask it here anyway. I'm trying to build a weather vane, and am looking at using several linear hall effect sensors (such as the allegro 1324) laid out around a shaft with a free-spinning magnet on it.
how many sensors would i need? this is what i'm looking at doing now (they're the sot23w package)
i could get away with 3 laid out on the corners of an equilateral triangle, but... can i get away with half of the schematic above, and just look at the effect from the north pole vs the south pole?