How to Use GH1248 Hall Sensor: Examples, Pinouts, and Specs

The GH1248 Hall Sensor, manufactured by GoChip Elec Tech, is a versatile electronic component designed to detect magnetic fields and convert them into electrical signals. This sensor is widely used in various applications, including proximity sensing, positioning, speed detection, and current sensing. Its ability to provide accurate and reliable measurements makes it an essential component in many electronic systems.

1. Power Supply: Connect the Vcc pin to a 3.3V or 5V power supply.
2. Ground Connection: Connect the GND pin to the ground of the circuit.
3. Output Signal: Connect the OUT pin to a digital input pin of a microcontroller or other digital logic device.

• Magnetic Field Orientation: Ensure that the magnetic field is perpendicular to the sensor for optimal detection.
• Distance: Maintain an appropriate distance between the sensor and the magnetic source to avoid saturation or weak signals.
• Debouncing: Implement debouncing in software to filter out noise and ensure stable readings.
• Temperature: Operate the sensor within the specified temperature range to avoid inaccurate readings or damage.

Arduino UNO       GH1248 Hall Sensor
-----------       ------------------
5V --------------> Vcc
GND -------------> GND
Digital Pin 2 ---> OUT

// GH1248 Hall Sensor Example Code
// Connect the OUT pin of the GH1248 to digital pin 2 of the Arduino UNO

const int hallSensorPin = 2; // Hall sensor connected to digital pin 2
int sensorState = 0;         // Variable to store the sensor state

void setup() {
  pinMode(hallSensorPin, INPUT); // Set the hall sensor pin as input
  Serial.begin(9600);            // Initialize serial communication
}

void loop() {
  sensorState = digitalRead(hallSensorPin); // Read the sensor state

  if (sensorState == HIGH) {
    Serial.println("Magnetic field detected!"); // Print message if magnetic field is detected
  } else {
    Serial.println("No magnetic field.");       // Print message if no magnetic field is detected
  }

  delay(500); // Wait for 500 milliseconds before the next reading
}

1. No Output Signal:

   • Check Connections: Ensure all connections are secure and correct.
   • Power Supply: Verify that the sensor is receiving the correct supply voltage.
   • Magnetic Field: Ensure the magnetic field is within the sensor's detection range.

2. Unstable Readings:

   • Debouncing: Implement software debouncing to filter out noise.
   • Interference: Minimize electromagnetic interference from other components.

3. Incorrect Readings:

   • Orientation: Ensure the magnetic field is perpendicular to the sensor.
   • Distance: Adjust the distance between the sensor and the magnetic source.

Q1: Can the GH1248 Hall Sensor detect both North and South poles of a magnet? A1: Yes, the GH1248 can detect both North and South poles, but the output signal will be the same for both.

Q2: What is the maximum distance the GH1248 can detect a magnetic field? A2: The detection distance depends on the strength of the magnetic field. Typically, it can detect fields up to a few centimeters away.

Q3: Can I use the GH1248 Hall Sensor in an outdoor environment? A3: Yes, the GH1248 can operate in a wide temperature range (-40°C to 85°C), making it suitable for outdoor use. However, ensure it is protected from moisture and extreme conditions.

Q4: How do I know if the sensor is working correctly? A4: You can test the sensor by bringing a magnet close to it and observing the output signal. If the output changes from LOW to HIGH, the sensor is functioning correctly.

By following this documentation, users can effectively integrate the GH1248 Hall Sensor into their projects, ensuring accurate and reliable magnetic field detection.