Hall Magnetic Induction Sensor Magnetic Detection Pole Resolver North And South Detection Module DIY Learning Kits DC45V-20V Features: 1.Wide working voltage 2.With indicator light 3.Exquisite and compact product, easy to carry 4.Durable material with long lifespan 5.Simple operation and strong applicability Parameters: Size: 33mm X 22mm wide Working voltage: DC4.5V to 20V Module function: North and South Pole resolution, South Pole approaching bright blue light, North Pole approaching bright red light. Output load current: less than or equal to 25MA Working temperature range: -40 to 80 degrees Celsius. Detection distance: Within 7MM through visual inspection, the strong magnetic field can reach around 1.5CM. Interface definition VCC: Power supply positive pole GND: Power supply negative pole OUT: Output signal detects the south pole of the magnet, the blue indicator light is on, and pin S outputs a low level; Detected the north pole of the magnet, the red indicator light is on, and pin N outputs a low level; When there is no magnet, both blue and red indicator lights are off, and pins S and N both output high levels. The principle of this magnetic polarity detection is that the magnetic induction element Hall 44E senses the south pole of the magnet on the front (with words) and the north pole of the magnet on the back.