Hall Effect Switch Arduino

But these sensors are quite more expensive for our diy projects.

Hall effect switch arduino.

Using hall effect sensor with arduino uno sensors have always been a vital component in any project. We are going to use a hall effect switch to turn the arduino uno s built in led on and off with a magnet. The arduino will be programmed such that when a magnet is brought close to the hall effect sensor the led comes on and when the magnet is removed it goes off. For today s tutorial we will demonstrate how the hall effect sensor works by connecting it alongside a led to an arduino.

One disadvantage of a hall effect sensor is the much lower measuring accuracy compared to fluxgate magnetometers or magnetoresistance based sensor. These are the ones which convert the real real time environmental data into digital variable data so that it can be processed by electronics. Hall effect sensor arduino program the hall effect sensor involves in contact less sensing to count the number of revolutions of a wheel digital speedometer motor speed and position control and more position detection circuits. We will be using the allegro microsystems a1120eua hall effect switch.

This is a very simple arduino code that utilizes the interrupt pin 0 digital pin 2 of the arduino. Whenever the hall effect sensor detects a magnet it outputs a high 5v voltage to its vout pin. Connect pin 1 of the switch to the arduino 5v supply red wire connect pin 2 to 0v black wire connect pin 3 to arduino input pin 12 orange wire. A hall effect sensor can be sensitive to either north pole or south pole but not both.

This sensor made easy to measure accurate position and steps of rotating device. Hall sensor as a switch can be completely build in a case and is therefore protected against dirt and water.