The first video below lays the basic groundwork, with a bunch of experiments with 3-axis Hall effect sensors, specifically the Texas Instruments TMAG5273 and TMAG5170. They’re essentially the ...

He built this set of no-contact limit switches using a hall effect sensor. The small black package sticking out past the end of the protoboard is the sensor. It is used to detect a magnetic field.

Hall effect position sensors are noncontact devices that convert energy from a magnetic field into an electrical signal. The sensors use the Hall effect, an electrical potential (the Hall voltage) ...

Hall effect proximity sensors are used to detect the proximity, presence or absence of a magnetic object using a critical distance. They function via an electrical potential that is developed across ...