Control DC Motor using Temperature sensor

Control DC Motor using Temperature sensor

Description: 

The DC motor is controlled through the Temperature Sensor using the following criteria. 

• When the Temperature reading is greater than 40' C, the Motor is ON and the Red LED is turned ON. 
• When the Temperature reading is less than 40' C, the Motor is OFF and the Green LED is turned ON.

Working Demo: 

https://youtu.be/L-koKBFJmVI

Components required:

1. Arduino UNO
2. DC motor
3. Motor Driver [L293D]
4. Battery [9V]
5. Temperature Sensor [TMP36]

Schematic diagram:

Code: 

int celsius = 0;
int fahrenheit = 0;
int Ena=7;
void setup()
{
  Serial.begin(9600);
  pinMode(A0, INPUT);
  pinMode(13, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  analogWrite(Ena,255);
}

void loop()
{
  celsius = map(((analogRead(A0))), 0, 1023, 30, 70);
  fahrenheit = ((celsius * 9) / 5 + 32);
  Serial.print(celsius);
  Serial.print(" C, ");
  Serial.print(fahrenheit);
  Serial.println(" F");
  
   if (celsius < 40) {
    digitalWrite(2, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(8, LOW);
    digitalWrite(13, LOW);
   
  }
  
  if (celsius > 40)
  {
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(13,LOW);
    digitalWrite(8, HIGH);
    
  }
  
  delay(10); 
}