Introduction

What's the best way to detect the magnet? Use anther magnet. But it's not sensitive enough. You have to feel it by youself.Right.This Hall sensor knows whether there is a magnetic object nearby or not. And it correctly tells you through ditigal output.See below picture for a quick demo!

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

Specification

• Supply Voltage: 3.3V to 5V
• Indicator LED on board
• Interface: Digital
• Size:22x30mm

Pinout

1. GND
2. VCC
3. Signal

Connection Diagram

Sample Code

int ledPin = 13;                // choose the pin for the LED
int inputPin = 2;               // choose the input pin
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
  }
}

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