MINI PROJECT
AUTOMATIC TEMPERATURE
CONTROLLED FAN
ABHIJEET KUMAR
2300520400004
MECHANICAL ENGINEERING
HIMANSHU
2300520400031
INTRODUCTION :
This mini project focuses on the
development of an automatic
temperature-controlled fan. It’s a
simple yet effective solution for
maintaining optimal temperatures in
enclosed spaces.
COMPONENTS REQUIRED
The following are the materials required to perform a temperature-based fan
speed control using Arduino.
1.Arduino UNO
2.DHT11 sensor
3.DC Fan
4.2n2222 transistor
5.9 volt battery
6.16x2 LCD
7.1K resistor
8.Connecting wires
Arduino Uno
It has a small chip that can be
programmed to control various
components like LEDs, motors, and
sensors. You write code on your
computer, send it to the Arduino
Uno, and it executes that code to
interact with the connected
components.
DHT11 SENSOR
The DHT11 is a small sensor that measures
temperature and humidity.
How it works:
•Temperature: Measures in degrees Celsius.
•Humidity: Measures the moisture level in
the air (in percentage).
2n2222 transistor
The 2N2222 is a small, common NPN
transistor used in electronics. A
transistor acts like a switch or an
amplifier for electrical signals.
What it does:
•Switching: You can use it to turn
things like LEDs or motors on and off.
•Amplifying: It can boost a small
electrical signal to a larger one.
16X2 LCD
A 16x2 LCD is a small display
screen used in electronics
projects. The "16x2" means it has
16 characters per line and 2 lines
in total. It’s good for showing
simple text, like numbers, words,
or messages.
How does it work ?
In the first step, the sensor senses the temperature
by temperature and humidity sensor
namely DHT11.
In the second step, the sensor's output is taken
and conversion of temperature value into a suitable
number in Celsius scale is done. The fan speed is
controlled by using PWM signals. And last part of
the system shows humidity and temperature on
LCD and Fan runs.