The A3144 Hall Effect Sensor is a reliable digital magnetic switch sensor in a compact TO-92 package designed for Arduino, ESP32, RPM measurement, wheel speed detection, magnetic proximity sensing, robotics, and automation projects.
- Digital Hall Effect magnetic switch output
- Compact TO-92 package
- Wide 4.5V – 24V operating voltage
- Open collector digital output
- Active LOW output when magnet is detected
- Fast switching response
- Compatible with Arduino, ESP32 & Raspberry Pi
- Breadboard-friendly design
Quick Wiring
The “3144 609” marked side should face toward you when identifying pins.
Pin 1 → 4.5V–24V supply voltage.
Pin 2 → Ground.
Pin 3 → Digital input pin on your microcontroller.
Specifications
Getting Started
The TO-92 package is suitable for standard breadboard prototyping.
Connect VCC and GND to your Arduino, ESP32, or other microcontroller circuit.
Connect OUT to a digital GPIO input. Use a pull-up resistor or internal pull-up if required.
The output switches LOW when the correct magnetic field is detected.
Common Uses
Common Questions
This is a digital Hall switch sensor with ON/OFF output behaviour. It does not output a proportional analog voltage.
Yes. Connect OUT to a digital input pin and read HIGH/LOW changes using digitalRead().
The A3144 uses an open collector style output, so a pull-up resistor is normally required unless your microcontroller input has an internal pull-up enabled.
The output switches LOW when the correct magnetic field is detected near the sensor face.
No. The AH3503 is a linear analog Hall sensor. The A3144 is a digital magnetic switch sensor.