Description
Linear Hall Magnetic Sensor
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.
A magnetic field is detected by the sensor and will be printed as an analog voltage value. You can control the sensitivity of the sensor with the potentiometer.
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