Hall Sensor SKU: PZSHED0001

Hall Sensor

Description

The magnetic sensor based on the Hall induction principle can be used to detect magnetic materials (magnets), regardless of polarity, and the range can reach about 3cm (the detection range is related to the strength of magnetism). It has the advantages of being sensitive to magnetic field, simple structure, small size, wide frequency response, large output voltage change and long service life.

Note:It's a omnipolar magnet dectector so that it can not tell two polarities apart.

---

Specifications

• Working Voltage: 3.3V to 5V
• Output Signal: usually output low level, output high level when magnetism is detected (at the same time the onboard LED is on)
• Product Size: 30mm * 22.0mm
• Fixing Hole Size: 3mm

---

Pin Description

---

DataSheet

Media: OH9249.pdf

---

Case and Test Code

Arduino Connection Method

Arduino Code

int ledPin = 13;                // choose the pin for the LED
int inputPin = 2;               // Connect Hall sensor to Pin2
int val = 0;                    // variable for reading the pin status
void setup() {
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(inputPin, INPUT);     // declare pushbutton as input
}
void loop(){
  val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, LOW);  // turn LED OFF
  } else {
    digitalWrite(ledPin, HIGH); // turn LED ON
  }
}

Media: Hall Magnetic Sensor - Arduino Code Download.rar

Test Result: According to the wiring diagram, the Arduino uploads the code, and after power-on, when we use a magnet to approach the digital Hall magnetic sensor, we will find that the small light is on. When we remove the magnet, the LED turns off.

---

Raspberry Pi Connection Method

Raspberry Pi Test Method

• Connect the sensor to the Raspberry Pi 4B, and put the test code on the Raspberry Pi system in the form of a folder.
• If pip is not installed, you must install pip first: (skip this step if installed)
• Enter the code file on the left side of the Raspberry Pi, right-click and select Open with...

Choose Geany Software

Raspberry Pi Code

import RPi.GPIO as GPIO
from time import sleep
val=0

sensorPin = 18


GPIO.setmode(GPIO.BCM)

GPIO.setup(sensorPin,GPIO.IN)

while True:
    val = GPIO.input(sensorPin)
    print(val);
    if(val == 0):  
        print("No induction") 
    else:
        print("A magnetic field") 
    sleep(0.1)
GPIO.cleanup() # Release all GPIO

Media: Hall Magnetic Sensor - Raspberry Pi Code Download.rar

---