/*LM35 Thermometer * *LM35 simpy connected to: 5+ * 0V * Analog Pin 0 */
int potPin = 0;

float temperature = 0;

int redLED=12;

int orangeLED=11;

int whiteLED=9;

long val=0;
void setup(){ pinMode(redLED, OUTPUT);

pinMode(yellowLED, OUTPUT); pinMode(greenLED, OUTPUT);

Serial.begin(9600);

Serial.println("LM35 Thermometer");

}
void loop ()

{
val = analogRead(potPin);

temperature = (val*500/1024);

Serial.println ((long)temperature);
if (temperature > 40)

{

digitalWrite (redLED, HIGH);

digitalWrite (orangeLED, LOW);

digitalWrite (blueLED, LOW);

digitalWrite (whiteLED, LOW);

}

else if ((temperature >30) && (temperature <=39))

{

digitalWrite (redLED, LOW);

digitalWrite (orangeLED, HIGH);

digitalWrite (blueLED, LOW);

digitalWrite (whiteLED, LOW);

}

else if ((temperature >17) && (temperature <=29))

{

digitalWrite (redLED, LOW);

digitalWrite (orangeLED, LOW);

digitalWrite (blueLED, LOW);

digitalWrite (whiteLED, HIGH);

}

else

{

digitalWrite (redLED, LOW);

digitalWrite (orangeLED, LOW);

digitalWrite (greenLED, HIGH);

}
delay(2000);
}