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Detailed Product Description:

The Hall Effect Sensor module A3144 is a fundamental component for any project requiring reliable, non-contact magnetic sensing. Based on the principle of the Hall Effect, this module acts as a magnetic switch, detecting the presence of a magnetic field and providing a simple digital output. It is a favorite among makers and educators for its ease of use and direct compatibility with microcontrollers like Arduino. Its robust design, including a built-in pull-up resistor and an onboard LED for visual feedback, makes it a perfect plug-and-play solution.

The A3144 is a digital output sensor, meaning it provides a clear HIGH or LOW signal. When a strong enough magnetic field, specifically from a magnet's south pole, is brought near it, the output pin instantly switches to a low state. This simple ON/OFF logic is easy to program and ideal for a wide range of applications. Operating on a typical 5V DC supply, it is a low-power component with built-in reverse polarity protection, adding an extra layer of safety for beginners. Its fast response time (just a few microseconds) allows it to be used in high-speed applications.

From building a simple DIY security alarm for a door or window to creating a precise robotics speed detection system by measuring the RPM of a motor, this module is incredibly versatile. Its high sensitivity and solid-state reliability make it a superior alternative to mechanical switches. Whether you're a student working on a school project or an engineer prototyping an industrial application, the A3144 magnetic switch module is an indispensable tool for all your magnetic field sensor needs.

The Magnetic Sensor Module is a reliable and easy-to-use Hall Effect sensor designed for detecting the presence of magnetic fields. When a magnet approaches the sensor, the output goes LOW, triggering the digital pin. The onboard signal indicator LED gives visual feedback during operation.

This module is widely used in door open/close detectors, speed monitoring systems (RPM counters), line following robots, and magnetic switches. It operates on 5V logic, making it perfect for Arduino and other development boards.

Key Features:

• Digital magnetic sensor module using Hall Effect technology

• Detects magnetic fields from permanent magnets

• Compatible with Arduino, Raspberry Pi, ESP32, STM32

• Ideal for door open/close detection, speed sensing, and home security

• Onboard status LED, digital output, and sensitivity adjustment

Technical Specifications:

How to Use with Arduino:

Wiring:

Sample Arduino Code:

int sensorPin = 2;
void setup() {
  pinMode(sensorPin, INPUT);
  Serial.begin(9600);
}
void loop() {
  int sensorValue = digitalRead(sensorPin);
  if(sensorValue == LOW) {
    Serial.println("Magnet Detected!");
  } else {
    Serial.println("No Magnet");
  }
  delay(500);
}

Applications:

• Door/window open detection

• Rotational speed measurement (RPM)

• Home automation & magnetic alarms

• Line following & object detection robots

• Magnetic switch in embedded systems

Package Includes:

• 1 × Magnetic Hall Effect Sensor Module