Week #7

Ideation

Tell us about your assignment's idea for this week. Why do you care about this idea? What inspired you? (Please include images or links to sources of inspiration)

The project involves making a simple cooling fan for a laptop but this time will be automatic by using Arduino and coding.

When the temperature gets too high, the fan automatically turns on to cool the laptop down.

This project aims to keep laptops from overheating, especially during heavy use and can be easily carried around due to its portable design.

Tool Chain

Which software/machines/materials did you use in the assignment? Why?

SOFTWARE

AUTODEST TINKERCAD

Simulation Software

Arduino IDE

Arduino Software

COMPONENTS

Arduino Uno

ON/OFF Switch

Relay

DHT Sensor

LCD

DC Fan 5v

Preparation Process

Explain the design and/or preparation process of your assignment. How did you use the tool or software to design and/or prepare your assignment before fabrication/implementation?

Thinking about what components make this function and idea (DHT Sensor, DC Fan, Switch, LCD)
I was searching how to connect these components with an Arduino board.

Coding:
1. Thinking about how I can make the code to perform the idea🤔.
2. If I turn on the laptop fan, I need to detect if the temperature is hot or not.
3. If it is hot the fan will automatically turn on and the temperature and humidity will display on the LCD.

#include <DHT.h>

#include <LiquidCrystal_I2C.h>

#define DHTTYPE DHT11 // DHT11 sensor type

#define DHTPIN 2 // Pin where the DHT sensor is connected

DHT dht(DHTPIN, DHTTYPE);

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

int LED = 3;

int Relay = 4;

int Switch = 5;

void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

dht.begin(); // Initialize DHT sensor

pinMode(LED, OUTPUT);

pinMode(Relay, OUTPUT);

pinMode(Switch, INPUT_PULLUP);

}

void loop() {

int Switch_Read = digitalRead(Switch);

if (Switch_Read == LOW) {

float humidity = dht.readHumidity();

float temp = dht.readTemperature();

Serial.print("Humidity (%): "); // Just for check

Serial.println(humidity);

delay(1000);

Serial.print("temperature (%): ");

Serial.println(temp);

delay(1000);

lcd.init(); // initialize the lcd

lcd.backlight();

lcd.setCursor(0, 0);

lcd.print("Temp = ");

lcd.setCursor(7, 0);

lcd.print(temp);

lcd.setCursor(0, 1);

lcd.print("Humd = ");

lcd.setCursor(7, 1);

lcd.print(humidity);

if (temp > 20) {

digitalWrite(LED, HIGH);

digitalWrite(Relay, HIGH);

} else {

digitalWrite(LED, LOW);

digitalWrite(Relay, LOW);

}

} else {

digitalWrite(LED, LOW);

digitalWrite(Relay, LOW);

}

Development/Implementation Process

Explain the development/implementation process of your assignment. How did you use the machine/tool to manufacture or implement the design of your assignment?

First, testing each component to make sure that all works well.
Arduino --> connecting the 5-volt and GND from Arduino to positive and negative lines on the breadboard.
DHT Sensor --> Connect 3 pins of the DHT with the +ve, and -ve lines in the breadboard and PIN 2 in Arduino.
Relay --> Connect the V IN, GND with the +ve, and -ve lines in the breadboard, IN PIN to PIN 5 in Arduino, NO PIN to the +ve of the adaptor, and COM to the +ve of the fan.
Fan --> Connect its +ve to COM in Relay, and the other one to the -ve line.
Switch --> Connect any terminal to PIN 5 and the other one to the -ve line.
Next, connected the Arduino Jake to the laptop, and from Arduino IDE I chose the correct port and then uploaded the code on Arduino.

comp.mp4

enclosure.mp4

Overcoming Challenges

What kinds of challenges or problems did you face while doing the assignment, tutorials, or exercises? How did you solve them? Did you ask for help from an instructor or peer? Please provide a link to the tutorial or article that you used to solve your problem (if any)

First, when I uploaded the code the ON/OFF Switch did not work.

Solution

To troubleshoot, I used the Serial Monitor to print something inside the if condition to see if it was being executed. It turned out that the condition wasn't being met. After reviewing the code, I realized that I had forgotten to store the switch reading in a separate variable.

Final Project

How can you use the skills and knowledge that you've acquired this week in your final project?

This week, I learned how to connect many components with Arduino, making code Text to make the code of the project and I will use this in my final project.

WOW!

What is the coolest thing that you've learned this week? What is something that you will never forget from this week?

This week I searched to learn more things about Arduino and this playlist was very helpful.

Weekly Digest [OPTIONAL]

Tell us about any other cool things that you've made this week: in the Hands-on activity, tutorial examples, exercises, or any other cool mini-project that you tried out aside from the assignment.

Assignment Design Files

LaptopFan.INO

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