Magnuson 3

//TMP36 Pin Variables
int sensorPin = 5; 	//the analog pin the TMP36's Vout (sense) pin is connected to
                        	//the resolution is 10 mV / degree centigrade with a
                        	//500 mV offset to allow for negative temperatures

void setup()
{
  pinMode(A5, INPUT);	//temperature input
  pinMode(2, OUTPUT);	//blue led
  pinMode(3, OUTPUT);	//green led
  pinMode(4, OUTPUT);	//yellow led
  pinMode(5, OUTPUT);	//orange led
  pinMode(6, OUTPUT);	//red led
}

void loop()                    	// run over and over again
{
 //getting the voltage reading from the temperature sensor
 int reading = analogRead(sensorPin);

 // converting that reading to voltage, for 3.3v arduino use 3.3
 float voltage = reading * 5.0;
 voltage /= 1024.0;


 // now print out the temperature
 float temp = 100*voltage-50 ;  		//converting from 10 mv per degree wit 500 mV offset
                                               		//to degrees ((voltage - 500mV) times 100)

//int temp = 0;


  if (temp <= -17.7) {		//turn blue led on if T below -17.7C or 0F
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
  }
  if (temp > -17.7 && temp <= -6.66667 ) {	//turn green led on if T 0F to 20F
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
  }
  if (temp > -6.66667 && temp <= -3.888) {		//turn yellow led on if T 20F to 25F
    digitalWrite(2, LOW);
    digitalWrite(3, LOW);
    digitalWrite(4, HIGH);
    digitalWrite(5, LOW);
    digitalWrite(6, LOW);
  }
  if (temp > -3.888 && temp <= -0.555556) {		//turn orange led on if T 25F to 31F
    digitalWrite(2, LOW);
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    digitalWrite(5, HIGH);
    digitalWrite(6, LOW);
  }
  if (temp > 0) {				////turn red led on if T above 32F
    digitalWrite(2, LOW);
    digitalWrite(3, LOW);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
    digitalWrite(6, HIGH);
    tone (9,1000);
  }
  delay(10); // Delay a little bit to improve simulation performance
}