Discovered by Edwin Hall in 1879, Hall effect refers to the potential difference on opposite sides of a bar-shaped conducting or semiconducting material (Hall element). This potential difference (voltage) is produced by a magnetic field applied perpendicular to the Hall element through which an electric current flows. Rotation of the magnet in close proximity to the application-specific standard product (ASSP) produces the desired output signal that is pre-programmed into the ASSP.