Week 7- Journal

/*

*/

// the setup function runs once when you press reset or power the board

void setup() {

  pinMode(3, OUTPUT); // red led

  pinMode(11, OUTPUT); // white led

  pinMode(5, INPUT); // ir sensor

  pinMode(10, OUTPUT); // fan

  pinMode(A0, INPUT); // temp sensor

  Serial.begin (9600);

  digitalWrite (10, LOW);

}

// the loop function runs over and over again forever

void loop() {

// if the temp sensor read temprature value greater than 70 switch LED on and switch the fan on

  //  int ir = digitalRead(5);

 int val= analogRead(A0);

  float mv=(val/1024.0)*5000;

  float cel=  mv/10;

  if (cel > 70 ) {

    digitalWrite(10, HIGH);  // switch fan on

  digitalWrite(3, HIGH);   // switch red led on

  // delay(100);

// print temprature value 

  Serial.println(cel);

  Serial.println(",");

  Serial.println(digitalRead (10));

  }

  if (digitalRead (5) == LOW){ // if the sensor feel the cup

  digitalWrite(11, HIGH);  // turn the  white LED on

  delay(1000);                      // wait for a second

  digitalWrite(11, LOW);   // turn the LED off

  delay(1000);                      // wait for a second

}

// if there is no cup  , turn off the fan and led

else {

    digitalWrite(10, LOW);  // turn the fan off

  digitalWrite(3, LOW); // turn the white led off  

  }          

}