Tutorial 4 - 1D

TUT4-1D.ino

int analogInPin = A0;  // Analog input pin that the potentiometer is attached to
int btnPin = 2;
int buzzerPin = 6;
bool toggle =false;

void setup() {
  Serial.begin(9600);
  pinMode(buzzerPin, OUTPUT);
}

void loop()
{
  int rawvoltage= analogRead(analogInPin);
  float millivolts= rawvoltage * (5000/1023.0);
  float kelvin= (millivolts/10);

  Serial.print(millivolts);
  Serial.print(" mV\t");

  Serial.print(kelvin);
  Serial.print(" Kelvin\t");

  float celsius= kelvin - 273.15;
  float f = (celsius * 1.8) + 32;

  if(digitalRead(btnPin) == HIGH) {
    toggle=!toggle;
    digitalWrite(buzzerPin, HIGH);
    delay(500);
    digitalWrite(buzzerPin, LOW);
  }

  if(!toggle) {
    Serial.print(celsius);
    Serial.println(" Celsius");
    if (celsius>35) {
      digitalWrite(buzzerPin, HIGH);
    } 
    else {
      digitalWrite(buzzerPin, LOW);
    }
  } 
  else {
    Serial.print(f);
    Serial.println(" Farenheit");
  }
  delay(300);
}