Hall Effect Sensor is a transducer which varies the output voltage according to change in magnetic field.
Electricity carried through a conductor will produce a magnetic field that varies with current, and a Hall sensor can be used to measure the current without interrupting the circuit. Typically, the sensor is integrated with a wound core or permanent magnet that surrounds the conductor to be measured. One very important feature of the Hall effect is that it differentiates between positive charges moving in one direction and negative charges moving in the opposite.
How Hall Effect Sensor Works: -
Hall Sensor usually have three pins and below is the related diagram in fig1.
The Hall Effect refers to the potential difference (Hall voltage) on opposite sides of a thin sheet of conducting or semiconducting material through which an electric current is flowing, created by a magnetic field applied perpendicular to the Hall element. Here we have an amplifier in the cicuitry, it amplifies the signal carried by the Hall Element because the Hall effect sensor produce a very low signal.
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