/*
infrared sensor detector. connect signal of infrared to analog pin 0. as the distance
from an object to sensor increases/decreases, you will increase/decrease
speed of led blinks from HIGH to LOW

*/

int IR_Pin = A0;    // select the input pin for the potentiometer
int ledPin = 13;      // select the pin for the LED
int IR_Value = 0;  // variable to store the value coming from the sensor

void setup() {
  // declare the ledPin as an OUTPUT:
  pinMode(ledPin, OUTPUT);  
  Serial.begin(9600);
}

void loop() {
  // read the value from the sensor:
  IR_Value = analogRead(IR_Pin);    
  // turn the ledPin on
  digitalWrite(ledPin, HIGH);  
  // stop the program for <sensorValue> milliseconds:
  delay(IR_Value);          
  // turn the ledPin off:        
  digitalWrite(ledPin, LOW);   
  // stop the program for for <sensorValue> milliseconds:
  delay(IR_Value);     

Serial.println(String("")+ "delay value for LED = "+ IR_Value);  
}