Interfacing Hall Effect Sensor Module with Arduino
A Hall effect sensor or Hall sensor is a magnetic non-contact sensor that generates an electrical signal proportional to the magnetic field applied to it. Hall effect sensors are widely used in industrial applications like current-sensing, position detection, and contactless switching. They are basically like a small reed switch, and when a magnetic field is around, the output voltage will vary according to the magnetic flux. Hall effect sensors are used in BLDC applications because they are robust, accurate, and low failure rate.
[original story: Circuit Digest]