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Hall Effect Sensor

Hall effect sensor is a sensor that has output voltage that varies to magnetic field. This principles is look like in an electric generator. In an electric generator, when a conductor is moving through the magnetic field perpendicularly then a voltage will be generated at end to end the conductor.

In hall effect sensor, the moving conductor is substituted by charge drift. This charge drift will generates a voltage at end to end the media (usually semiconductor).

Figure of Principle of Hall Effect Sensor

Commonly, a Hall sensor is combined with circuitry that allows the device to act in a digital (on/off) mode, and may be called a switch in this configuration. So this sensor can be used as a proximity switch that be applied in brushless motor, automotive etc.

For example, the practical hall effect sensor is A1302EUA-T

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