We’ve even seen the sensors built into a voltmeter ... A contactless probe picks up the changing magnetic field around an unshielded wire with an AC voltage on it. Current doesn’t have ...

The probe tip is typically coated with a thin magnetic layer ... such as magnetic random access memories (MRAM) and magnetic field sensors. MFM imaging provides insights into the magnetic switching ...

But electrical currents also produce magnetic fields, and detecting these fields can offer several advantages over voltage measurements, says Myriam Pannetier-Lecoeur of the French Alternative ...

Your own brain also emits tiny pulses of magnetic energy every time a neuron fires. But measuring what direction those fields are pointing, for precise atomic sensors in particular, can get tricky.

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 ...

Graphic depiction of nitrogen-vacancy center sensors (red glowing spheres) used to probe electron motion in a conductor. (Image: JQI) NV centers are atomic-scale defects in diamond that can be used as ...