A3144 Hall Effect Sensor

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  • Chip: LM393 voltage comparator, A3144 Hall sensor
  • VCC: Positive power supply, 3.3 V to 5 V
  • GND: Negative power supply
  • DO: Digital signal output
  • AO: Analong signal output
  • Power indicator
  • Comparator output indicator
  • Comparator output capability: 16 mA
  • PCB Size: 32 x 14 mm


  • This module is based on the A3144E Hall switch sensor and it is designed to be used in applications requiring magnetic field sensing.
  • This module used to detect the presence of magnetic field. Whenever a magnetic field come near to sensor within its detection distance, it will output a signal on the output pin.
  • This module can be used in many projects like making a contactless switch for door alarm. It can also be used in making speedometer for car or a bike. If a magnet is attached to the wheel and this module in the stationary body, we can know the time taken to complete a cycle and by doing further calculation, we can calculate the speed. It can be used for sensing motor speed, position and more.
  • It features two outputs: AO, the analog signal output and DO, the digital output, after being passed through a voltage comparator. The Hall sensor outputs a low level voltage when magnetic field is detected.

Applications of Hall Effect Sensor Module

  • Docking Detection
  • Door Open and Close Detection
  • Proximity Sensing
  • Valve Positioning
  • Pulse Counting