Automatic Temperature Controlled Fan

In today's fast-paced world, where automation and technological advancements continue to shape various industries, digital manufacturing has emerged as a game-changer. One such remarkable innovation is the Automatic Temperature Controlled Fan, which revolutionizes the way we manage and regulate temperature in our daily lives.

Temperature control is a critical aspect of maintaining comfort and efficiency in diverse environments, including homes, offices, factories, and even in the realm of electronic devices. Traditional cooling solutions, such as manual fans or air conditioning units, often fall short in adapting to changing conditions, leading to energy inefficiency and suboptimal performance.

The key objective of our project is to enhance energy efficiency, optimize comfort levels, and provide a convenient and user-friendly experience. By leveraging digital manufacturing techniques, we aim to deliver a cost-effective and sustainable solution that integrates seamlessly into various environments, promoting a greener and more efficient future.

Throughout this project, we will explore the design, development, and implementation of the Automatic Temperature Controlled Fan, taking into account factors such as sensor integration, data processing, and fan speed modulation. We will also emphasize the importance of user feedback and usability testing to refine our solution and ensure it meets the needs and expectations of end-users.

Grove mini fan

Arduino UNO

Grove LCD 16x2

DHT11 sensor

2 resistors

1 transistor

1 LED

Connect the DHT11 sensor to the Arduino UNO:

• VCC to 5V
• GND to GND
• Data to digital pin 2

Grove mini Fan:

• VCC to 5V on Arduino UNO
• GND to GND on Arduino UNO
• A4 (yellow wire) to base pin of 2N2222 transistor
• A5 (white wire) to the Digital pin 9 on Arduino UNO

2N2222 transistor:

• Emitter (pin with the arrow symbol) to GND on Arduino UNO
• Base to A4 (yellow wire) from the Grove mini Fan
• Collector to the positive terminal of the fan

1K resistor:

• Connect one leg to the base pin of the 2N2222 transistor
• Connect the other leg to the collector pin of the 2N2222 transistor

Connect the Grove 16x2 LCD to the Arduino UNO:

• Connect GND to GND
• Connect VCC to 5V
• Connect SDA to analog pin A4
• Connect SCL to analog pin A5

LED

• Positive of led to pin 13
• Negative to one end of the resistor
• Another end of the resistor to ground

#include <Wire.h>        // Include the Wire library for I2C communication

#include <DHT.h>         // Include the DHT library for DHT11 sensor

#include <TimeLib.h>     // Include library for time library

#include "rgb_lcd.h"     // Include the rgb_lcd library for LCD display

rgb_lcd lcd;             // Create an instance of the rgb_lcd class

const int colorR = 255;  // Red color value for LCD backlight

const int colorG = 0;    // Green color value for LCD backlight

const int colorB = 0;    // Blue color value for LCD backlight

#define DHTPIN 2         // Pin number to which DHT11 sensor is connected

#define DHTTYPE DHT11    // Type of DHT sensor

#define FAN_PIN 9        // Pin number for the fan control

DHT dht(DHTPIN, DHTTYPE); // Create an instance of the DHT class

tmElements_t tm;

//creating an array for months of the year

const char *monthName[12] = {

  "Jan", "Feb", "Mar", "Apr", "May", "Jun",

  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"

};

void setup() {

  lcd.begin(16, 2);           // Initialize the LCD with 16 columns and 2 rows

  lcd.setRGB(colorR, colorG, colorB); // Set the LCD backlight color

  lcd.print("Temperature: "); // Display text on the first row

  lcd.setCursor(0, 1);        // Set the cursor to the second row

  lcd.print("Fan Speed:");    // Display text on the second row

  pinMode(FAN_PIN, OUTPUT);   // Set the fan control pin as output

  digitalWrite(FAN_PIN, 0);   // Start the fan with 0 speed (turned off)

  pinMode(13, OUTPUT);        //LED pin as output

  Serial.begin (9600);

  Serial.println(__DATE__);

  Serial.println(__TIME__);

}

void loop() {

  int time;

  int temperature = dht.readTemperature(); // Read the temperature from the DHT sensor

  lcd.setCursor(12, 0);        // Set the cursor to the second column of the first row

  lcd.print(temperature);      // Display the temperature on the LCD

  lcd.print("C");             // Display the temperature unit

  delay(1000);

  int fanSpeed = map(temperature, 10, 30, 0, 255); // Map the temperature range to fan speed range

  fanSpeed = constrain(fanSpeed, 0, 255); // Ensure fanSpeed is within the valid range

  digitalWrite(FAN_PIN, fanSpeed); // Set the fan speed based on the mapped value

  lcd.setCursor(11, 1);        // Set the cursor to the second column of the second row

  int fS = fanSpeed*100/255; //Convert the fanSpeed into percentage

  lcd.print(fS);         // Display the fan speed on the LCD

  lcd.print("%");              // Display the fan speed unit

  delay(1000);

  if(hour()>=21 || hour()<=6){ //if the hour is greater than 9 PM or less than 6 AM

    digitalWrite(13, HIGH);   //turn on LED

  }else{

    digitalWrite(13, LOW);

  }

}

// function to get the date from PC

bool getDate(const char *str)

{

  char Month[12];

  int Day, Year;

  uint8_t monthIndex;

  if (sscanf(str, "%s %d %d", Month, &Day, &Year) != 3) return false;

  for (monthIndex = 0; monthIndex < 12; monthIndex++) {

    if (strcmp(Month, monthName[monthIndex]) == 0) break;

  }

  if (monthIndex >= 12) return false;

  tm.Day = Day;

  tm.Month = monthIndex + 1;

  tm.Year = CalendarYrToTm(Year);

  return true;

}

// digital clock display of the time

void digitalClockDisplay(){

  Serial.print(hour());

  printDigits(minute());

  printDigits(second());

  Serial.println();

}

// utility function for digital clock display: prints preceding colon and leading 0

void printDigits(int digits){

  Serial.print(":");

  if(digits < 10)

    Serial.print('0');

  Serial.print(digits);

}