Arduino-Controlled Smart Cooling System for Desktop Computers!

Do you have problems with your desktop computer overheating? Does your CPU get too hot and crash your system? Well, if that is the case you are in luck! This project will give you step by step instructions on how to make a circuit that uses an Arduino board as a smart cooling system for you PC!

Jan 21, 2024

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18589 views

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7 respects

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CC BY 4+

Tools

Smart appliances

Environmental Sensing

Home Automation

Internet Of Things

Monitoring

Devices & Components

16x2 LCD display with I²C interface

Arduino Uno Rev3

1 relay module 5 Vdc 10A (assembled)

12V adapter

5mm Red LED

TMP36- Analog Temperature sensor

Aligator Clips

CPU fan 12 volt

Male to male jumper wires

Jumper Male to Female 20 cm

Hardware & Tools

a laptop or a computer to test

Software & Tools

Arduino IDE

TINKERCAD

Project description

Code

Master Code (°C)

cpp

Master Code needed for this project! Degrees (°C)

1/*
2C++ code
3By Miles Peterson
4Date: 1/24/24
5Note that this is in degrees Celsius!
6*/
7#include <Adafruit_LiquidCrystal.h>
8
9Adafruit_LiquidCrystal lcd_1(0);
10
11void setup()
12{
13  lcd_1.begin(16, 2);
14  pinMode(A0, INPUT);
15  Serial.begin(9600);
16  pinMode(3, OUTPUT);
17  pinMode(5, OUTPUT);
18
19  lcd_1.print("LOADING.");
20  delay(1000); // Wait for 1000 millisecond(s)
21  lcd_1.print(".");
22  delay(1000); // Wait for 1000 millisecond(s)
23  lcd_1.print(".");
24  delay(1000); // Wait for 1000 millisecond(s)
25  lcd_1.print(".");
26  delay(1000); // Wait for 1000 millisecond(s)
27}
28
29void loop()
30{
31  lcd_1.clear();
32  if ((-40 + 0.488155 * (analogRead(A0) - 20)) >= 79) {
33    lcd_1.clear();
34    Serial.println((-40 + 0.488155 * (analogRead(A0) - 20)));
35    lcd_1.print((-40 + 0.488155 * (analogRead(A0) - 20)));
36    Serial.println("Fan: ON");
37    lcd_1.setCursor(0, 1);
38    lcd_1.print("Fan: ON");
39    lcd_1.setCursor(6, 0);
40    lcd_1.print("*C");
41    digitalWrite(3, HIGH);
42    digitalWrite(5, HIGH);
43    if ((-40 + 0.488155 * (analogRead(A0) - 20)) >= 93) {
44      lcd_1.setCursor(10, 0);
45      lcd_1.print("HIGH");
46      lcd_1.setCursor(10, 1);
47      lcd_1.print("TEMP!");
48    }
49    delay(2000); // Wait for 2000 millisecond(s)
50  } else {
51    lcd_1.clear();
52    Serial.println((-40 + 0.488155 * (analogRead(A0) - 20)));
53    lcd_1.print((-40 + 0.488155 * (analogRead(A0) - 20)));
54    Serial.println("Fan: OFF");
55    lcd_1.setCursor(0, 1);
56    lcd_1.print("Fan: OFF");
57    lcd_1.setCursor(6, 0);
58    lcd_1.print("*C");
59    digitalWrite(3, LOW);
60    digitalWrite(5, LOW);
61    delay(2000); // Wait for 2000 millisecond(s)
62  }
63}

/*
C++ code
By Miles Peterson
Date: 1/24/24
Note that this is in degrees Celsius!
*/
#include <Adafruit_LiquidCrystal.h>

Adafruit_LiquidCrystal lcd_1(0);

void setup()
{
  lcd_1.begin(16, 2);
  pinMode(A0, INPUT);
  Serial.begin(9600);
  pinMode(3, OUTPUT);
  pinMode(5, OUTPUT);

  lcd_1.print("LOADING.");
  delay(1000); // Wait for 1000 millisecond(s)
  lcd_1.print(".");
  delay(1000); // Wait for 1000 millisecond(s)
  lcd_1.print(".");
  delay(1000); // Wait for 1000 millisecond(s)
  lcd_1.print(".");
  delay(1000); // Wait for 1000 millisecond(s)
}

void loop()
{
  lcd_1.clear();
  if ((-40 + 0.488155 * (analogRead(A0) - 20)) >= 79) {
    lcd_1.clear();
    Serial.println((-40 + 0.488155 * (analogRead(A0) - 20)));
    lcd_1.print((-40 + 0.488155 * (analogRead(A0) - 20)));
    Serial.println("Fan: ON");
    lcd_1.setCursor(0, 1);
    lcd_1.print("Fan: ON");
    lcd_1.setCursor(6, 0);
    lcd_1.print("*C");
    digitalWrite(3, HIGH);
    digitalWrite(5, HIGH);
    if ((-40 + 0.488155 * (analogRead(A0) - 20)) >= 93) {
      lcd_1.setCursor(10, 0);
      lcd_1.print("HIGH");
      lcd_1.setCursor(10, 1);
      lcd_1.print("TEMP!");
    }
    delay(2000); // Wait for 2000 millisecond(s)
  } else {
    lcd_1.clear();
    Serial.println((-40 + 0.488155 * (analogRead(A0) - 20)));
    lcd_1.print((-40 + 0.488155 * (analogRead(A0) - 20)));
    Serial.println("Fan: OFF");
    lcd_1.setCursor(0, 1);
    lcd_1.print("Fan: OFF");
    lcd_1.setCursor(6, 0);
    lcd_1.print("*C");
    digitalWrite(3, LOW);
    digitalWrite(5, LOW);
    delay(2000); // Wait for 2000 millisecond(s)
  }
}

Master Code (°F)

cpp

Master Code needed for this project! Degrees (°F)

1/*
2C++ code
3By Miles Peterson
4Date: 1/23/24
5Note that this is in degrees Fahrenheit!
6*/
7 
8#include <Adafruit_LiquidCrystal.h>
9
10Adafruit_LiquidCrystal lcd_1(0);
11
12void setup()
13{
14  lcd_1.begin(16, 2);
15  pinMode(A0, INPUT);
16  Serial.begin(9600);
17  pinMode(3, OUTPUT);
18  pinMode(5, OUTPUT);
19
20  lcd_1.print("LOADING.");
21  delay(1000); // Wait for 1000 millisecond(s)
22  lcd_1.print(".");
23  delay(1000); // Wait for 1000 millisecond(s)
24  lcd_1.print(".");
25  delay(1000); // Wait for 1000 millisecond(s)
26  lcd_1.print(".");
27  delay(1000); // Wait for 1000 millisecond(s)
28}
29
30void loop()
31{
32  lcd_1.clear();
33  if ((-40 + 0.878679 * (analogRead(A0) - 20)) >= 175) {
34    lcd_1.clear();
35    Serial.println((-40 + 0.878679 * (analogRead(A0) - 20)));
36    lcd_1.print((-40 + 0.878679 * (analogRead(A0) - 20)));
37    Serial.println("Fan: ON");
38    lcd_1.setCursor(0, 1);
39    lcd_1.print("Fan: ON");
40    lcd_1.setCursor(6, 0);
41    lcd_1.print("*F");
42    digitalWrite(3, HIGH);
43    digitalWrite(5, HIGH);
44    if ((-40 + 0.878679 * (analogRead(A0) - 20)) >= 200) {
45      lcd_1.setCursor(10, 0);
46      lcd_1.print("HIGH");
47      lcd_1.setCursor(10, 1);
48      lcd_1.print("TEMP!");
49    }
50    delay(2000); // Wait for 2000 millisecond(s)
51  } else {
52    lcd_1.clear();
53    Serial.println((-40 + 0.878679 * (analogRead(A0) - 20)));
54    lcd_1.print((-40 + 0.878679 * (analogRead(A0) - 20)));
55    Serial.println("Fan: OFF");
56    lcd_1.setCursor(0, 1);
57    lcd_1.print("Fan: OFF");
58    lcd_1.setCursor(6, 0);
59    lcd_1.print("*F");
60    digitalWrite(3, LOW);
61    digitalWrite(5, LOW);
62    delay(2000); // Wait for 2000 millisecond(s)
63  }
64}

/*
C++ code
By Miles Peterson
Date: 1/23/24
Note that this is in degrees Fahrenheit!
*/
 
#include <Adafruit_LiquidCrystal.h>

Adafruit_LiquidCrystal lcd_1(0);

void setup()
{
  lcd_1.begin(16, 2);
  pinMode(A0, INPUT);
  Serial.begin(9600);
  pinMode(3, OUTPUT);
  pinMode(5, OUTPUT);

  lcd_1.print("LOADING.");
  delay(1000); // Wait for 1000 millisecond(s)
  lcd_1.print(".");
  delay(1000); // Wait for 1000 millisecond(s)
  lcd_1.print(".");
  delay(1000); // Wait for 1000 millisecond(s)
  lcd_1.print(".");
  delay(1000); // Wait for 1000 millisecond(s)
}

void loop()
{
  lcd_1.clear();
  if ((-40 + 0.878679 * (analogRead(A0) - 20)) >= 175) {
    lcd_1.clear();
    Serial.println((-40 + 0.878679 * (analogRead(A0) - 20)));
    lcd_1.print((-40 + 0.878679 * (analogRead(A0) - 20)));
    Serial.println("Fan: ON");
    lcd_1.setCursor(0, 1);
    lcd_1.print("Fan: ON");
    lcd_1.setCursor(6, 0);
    lcd_1.print("*F");
    digitalWrite(3, HIGH);
    digitalWrite(5, HIGH);
    if ((-40 + 0.878679 * (analogRead(A0) - 20)) >= 200) {
      lcd_1.setCursor(10, 0);
      lcd_1.print("HIGH");
      lcd_1.setCursor(10, 1);
      lcd_1.print("TEMP!");
    }
    delay(2000); // Wait for 2000 millisecond(s)
  } else {
    lcd_1.clear();
    Serial.println((-40 + 0.878679 * (analogRead(A0) - 20)));
    lcd_1.print((-40 + 0.878679 * (analogRead(A0) - 20)));
    Serial.println("Fan: OFF");
    lcd_1.setCursor(0, 1);
    lcd_1.print("Fan: OFF");
    lcd_1.setCursor(6, 0);
    lcd_1.print("*F");
    digitalWrite(3, LOW);
    digitalWrite(5, LOW);
    delay(2000); // Wait for 2000 millisecond(s)
  }
}

Downloadable files

Schematic

The schematic for this project, Very important!

Screenshot 2024-01-24 172020 (TINKER 2).png

Schematic (With captions)

The same schematic but with captions. Important!

Screenshot 2024-01-24 172555 (TINKER 3).png

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