Published July 14, 2021 © MIT

Temperature Controlled Fan

This project will learn you how you can build a temperature controlled fan.

IntermediateFull instructions provided1 hour26,486

Things used in this project

Hardware components

Breadboard (generic)

Arduino UNO

Resistor 330 ohm

5 mm LED: Red

Temperature Sensor

Buzzer

Geared DC Motor, 12 V

Software apps and online services

Arduino IDE

Story

Introduction

We live in an modern era right now. We want to do everything automatic. So, In this project I am going to show you all an automatic fan that will be ON and OFF according to the temperature level.

For this project I am using Tinkercad platform. So, the idea is very simple. One Arduino UNO will be used to make the decision when the Fan will ON or OFF. Arduino will connect with a temperature sensor. Then Arduino read the temperature value from the sensor. After that according to the temperature the fan will work.

Connections

Arduino Pin (A0) -------> Temperature Sensor (Vout)
Arduino Pin (2) --------> Green Led (Anode)
Arduino Pin (4) --------> Red Led (Anode)
Arduino Pin (7) --------> DC Motor Positive Pin
Arduino Pin (8) --------> Buzzer Positive Pin

Works to Do

Step-1

Step-2

Connect all the connection according to the schematic diagram.

Step-3

Then Select the code option and write the code.

Step-4

After completing the coding run simulation and test your project.

Video

Youtube Demo Video

Important Links

Tinkercad:https://www.tinkercad.com/

Gihub Repository:https://github.com/MakerBuddy/temperature-controlled-fan

Tinkercad Project: https://www.tinkercad.com/things/6LNU0B4Q4Qv-temperature-controlled-fan/editel

Code

temperatureControlledFan.ino

// Declare all the pins 
int temp = A0;
int greenLed = 2;
int redLed = 4;
int fan = 7;
int buzzer = 8;

int thresholdValue = 0;
int celsius = 0;
int fahrenheit = 0;

// Functions for various work
void greenLightOn(){
	digitalWrite(greenLed, HIGH);
}
void greenLightOff(){
	digitalWrite(greenLed, LOW);
}
void redLightOn(){
	digitalWrite(redLed, HIGH);
}
void redLightOff(){
	digitalWrite(redLed, LOW);
}
void fanOn(){
	digitalWrite(fan, HIGH);
}
void fanOff(){
	digitalWrite(fan, LOW);
}
void buzzerOn(){
	digitalWrite(buzzer, HIGH);
}
void buzzerOff(){
	digitalWrite(buzzer, LOW);
}

void setup()
{
  pinMode(redLed, OUTPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(fan, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(temp, INPUT);
  Serial.begin(9600);
}

void loop(){
  
  // Temperature calculation
  celsius = map(((analogRead(A0) - 20) * 3.04), 0, 1023, -40, 125);
  fahrenheit = ((celsius * 9) / 5 + 32);
  
  Serial.print(celsius);
  Serial.print(" C : ");
  Serial.print(fahrenheit);
  Serial.println(" F");
  
  if( celsius<= 30){
    greenLightOn();
    redLightOff();
    fanOff();
    buzzerOff();
    //Serial.println("green light on");
  }
  else if(celsius >= 31 && celsius <= 40){
    greenLightOff();
    fanOff();
    buzzerOff();
    redLightOn();
    //Serial.println("red light on");
  }
  else if(celsius > 40){
    redLightOn();
    fanOn();
    buzzerOn();
    greenLightOff();
    
    //Serial.println("Red Light On | Fan on");
  }
  else{
  	Serial.println("Temperature is Normal");
  }
  delay(1000);
}

Credits

Khaled Md Saifullah

18 projects • 44 followers

🦸Tech Enthusiast 👨🏾‍💻Programmer 📳IoT Specialist

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