Hall Effect Sensor Module is used to detect the proximity of a magnetic field if it is present or absent nearby. The A3144 hall sensor module is a small module. When the magnetic field rises above a threshold level, the open-collector output transistor switches on, which pulls the logic-compatible output low and illuminates the onboard LED indicator.

Hall Effect Sensor Module is used to Detect the proximity of a magnet. It is very much Smaller in size. When the magnetic field rises above a threshold level, the open-collector output transistor switches on, which pulls the logic-compatible output low and illuminates the on board LED indicator.

Its fast (The turn-on threshold is 35-450 Gauss, the minimum hysteresis is 20 Gauss, and the operating voltage range is 4.5 - 24 volts.This module uses the Allegro MicroSystems A3144EUA sensor. It has a 3 pin interface, signal, V+ and GND.

To use this sensor/switch, place a 10K pull-up resistor between the "S" pin and the middle pin (+), connect the "-" pin to ground. Supply voltage to the middle pin. The "S" pin will go low (gets pulled to ground) and the on board LED indicator will turn on when a magnet is brought near.

 Specification:

• Operating voltage range: 4.5 - 24 volts
• Minimum hysteresis: 20 Gauss
• Turn-on threshold: 35-450 Gauss
• Sensor: A3144 Hall Effect Sensor