GP2Y0A41SK Infrared Sensor Sharp GP2Y0A41SK Distance Sensor

	#define sensor 2 // Sharp IR GP2Y0A41SK0F (4-30cm, analog)
	void setup() {
	Serial.begin(9600); // start the serial port
	}
	void loop() {
	// 5v
	float volts = analogRead(sensor)*0.0048828125; // value from sensor * (5/1024)
	int distance = 13*pow(volts, -1); // worked out from datasheet graph
	delay(100); // slow down serial port
	if (distance <= 30){
	Serial.println(distance); // print the distance
	}
	}