Basic hall effect sensor project using arduino uno

                                       A Hall Effect Sensor is transducer that varies its output voltage in response to magnetic field.

Step 1 : components require

• Hall effect sensor (we use AH44E sensor)
• 10M resistor
• 3 wires for connection 
• Arduino uno
• any type of magnet       

Step 2 :

•     Resistor connect between pin 1(+vcc) & pin 3(digital output)

Step 3 : connection

connect sensor pin 1 to +5V pin of arduino  (Green wire)

connect sensor pin 2 to Gnd pin of arduino (White wire)

connect pin 3 of sensor to arduino 12 number pin (Red wire)

Step 4 : load program to arduino

Below program are paste in arduino programing


const int hallPin = 12;     // number of the hall effect sensor pin
const int ledPin =  13;     // the number of the LED pin
// variables will change:
int hallState = 0;          // the hall sensor status

void setup() {
  // initialize the LED pin as output:
  pinMode(ledPin, OUTPUT);    
  // initialize the hall effect sensor pin as input:
  pinMode(hallPin, INPUT);  
}

void loop(){
  // read the state of the hall effect sensor:
  hallState = digitalRead(hallPin);

  if (hallState == LOW) {  
    // turn LED on:  
    digitalWrite(ledPin, HIGH);
  }
  else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }
}

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