A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction ...

The average Hackaday reader likely knows, at least in the academic sense, what a magnetic field looks like. But as the gelatinous orbs in our skull can perceive only a tiny fraction of the EM ...

Many migratory birds use Earth’s magnetic field as a compass ... appear to calculate their geographical position by drawing data from different distances and angles between magnetic fields ...

The Rosetta-Philae spacecraft successfully touched down on Comet 67P/Churyumov-Gerasimenko, uncovering remarkable findings ...

It’s something [mircemk] demonstrates, with an Arduino-powered magnetic field strength meter that uses a UGN 3503U Hall effect device. The circuit is extremely simple, comprising the sensor ...