// Hall sensor
// by Juan Guillermo (Coco) Gomez

// A hall sensor is a magnetic field sensor, it can detect
// when a magnet is nearby.
// This example turns on a light (LED) connected to a digital pin when a 
// magnet is near the Hall sensor

// Created 3 November 2005
// Revised 4 April 2007

int ledPin = 48;  // diagnostic LED on the Wiring I/O board (pin 48) 
int pinHall = 0;  // Pin for the Hall sensor
int pinLed = 1;   // Pin for the led that turns on if the magnetic field is near


void setup()
{
  pinMode(ledPin, OUTPUT); // sets the digital pin as output
  pinMode(pinLed, OUTPUT); // sets the digital pin as output
  pinMode(pinHall, INPUT); // sets the digital pin as input
  digitalWrite(ledPin, HIGH); //turn on the Wiring board diagnostic LED
}

void loop()
{
  if (digitalRead(pinHall) == HIGH)  // If a magnet is near the Hall sensor
  {
    digitalWrite(pinLed, HIGH);	     // turns ON the LED
  }
  else {
    digitalWrite(pinLed, LOW);       // if not turns OFF the LED
  }
}
