A3144 Digital Hall Sensor Module - KY-003 - Switching - 3-pin

Hall effect sensor reacts to change in magnetic field, which makes it possible to count pulses generated by magnetic field. Most often used to count the rotational speed of the engine or vehicle wheels to the ABS system. Motor speed measurement module with A3144 switching Hall sensor can be used for motor speed measurement, position detection etc. Magnetic Speed Counting Sensor Module for Arduino Smart Car. Technical data Power supply: 4.5 - 24V Output current: 25mA Current consumption: 4 - 8mA Response time: 0.04 to 2 µS Type of signal output: digital: GND / VCC Output: without magnetic field: 4.6V, with magnetic field: 0.1V Sensor type: switching Module dimensions: 19mm x 15mm x 3mm Weight: 2g

In the circuit diagram provided, resistor R1 (10K) is used as a pull-up resistor and capacitor C1 (0.1uF) is used to filter any noise that may appear on the output.