ON when exposed to a sufficiently strong magnetic south pole, OFF when the magnetic field strength is reduced. Sensitivity is at its highest when the magnetic field lines act at a right angle to the middle of the sensor chip. * Test circuit with LED https://elecena.pl/product/27166023/unipolar-hall-switch-pic-h501 2024-11-07 https://elecena.pl/product/27166023/unipolar-hall-switch-pic-h501 2025-07-29