The sensor gives out an output HIGH (5V) voltage whenever the north pole of a magnet is brought close to it. The US1881 is a latching Hall effect sensor. There are two main types of Hall effect sensors: latching and non-latching. However, for applications that involve high-speed detection, like in the case of speedometers, high-frequency Hall effect sensors like US5881 or US1881 should be used. For applications where the speed of detection is not crucial, ordinary Hall effect sensors like 44E can be used. There are many types of Hall effect sensors, and certain types are better for certain applications. The basic working of the Arduino Hall effect sensor is shown in the picture below. The Arduino can detect this voltage change through its interrupt pin and determine whether the magnet is near the sensor or not. This voltage can be used to detect whether the sensor is in the proximity of a magnet or not. The Hall effect sensor works on the principle of the Hall effect, which states that whenever a magnetic field is applied in a direction perpendicular to the flow of electric current in a conductor, a potential difference is induced. If a magnet is attached to the wheel and a Hall Effect sensor is placed somewhere in the frame of the bike, the time taken for the wheel to complete one revolution can be measured, and with a bit more math, we can detect the bike's movement speed! How Does It Work? Similarly, this same principle can be used to make a speedometer for a bike or any other vehicle.

Whenever the door closes, the magnet is placed near the hall effect sensor and we are able to detect that the door has been closed. For instance, if we need to detect a door closing then we simply have to attach a magnet to the door and a hall sensor to the frame of the door. This sensor can be used to do a lot of different things.

Whenever a magnet moves past this sensor, it can detect it. This project uses a Hall effect sensor to detect the presence of a magnet. Have you ever wanted to make a project that involved contactless sensing, for example, to detect a door closing, count the number of revolutions of a wheel, or make a speedometer? Then this Arduino Hall effect sensor tutorial is for you!

Arduino camera signal switch contol