#define IR_SENSOR_PIN A0 // Analog pin for Sharp IR sensor
#define MOTOR_PIN 9      // Digital pin for controlling the motor

void setup() {
  pinMode(IR_SENSOR_PIN, INPUT);
  pinMode(MOTOR_PIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // Read distance from Sharp IR sensor
  int distance = readDistance();

  // Check if distance is less than 5 centimeters
  if (distance < 5) {
    // Turn on motor and run for 5 seconds
    digitalWrite(MOTOR_PIN, HIGH);
    delay(5000); // 5 seconds
    // Stop the motor
    digitalWrite(MOTOR_PIN, LOW);
  }

  delay(100); // Delay for stability
}

int readDistance() {
  // Read analog value from IR sensor
  int sensorValue = analogRead(IR_SENSOR_PIN);
  
  // Convert analog value to distance in centimeters
  // You may need to calibrate this according to your sensor and setup
  float distance = 9462.0 / (sensorValue - 16.92);
  
  // Print distance for debugging
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  
  return distance;
}