This project presents an Arduino-based automatic room ventilation system that controls the speed of a fan based on temperature readings from a TMP36 temperature sensor. An Arduino Uno microcontroller reads the temperature sensor and varies the speed of a 12V DC motor fan accordingly. The total cost of components is under Rs. 1500. When the room temperature exceeds normal levels, the Arduino increases the fan speed to provide ventilation until the temperature decreases.

1. AUTOMATIC ROOM
VENTILATION
USING ARDUINO
DONE BY:
MANIKANDAN G
NAVEEN V

2. INTRODUCTION
• This project presents the design and simulation of the fan
speed control system using an Arduino based on the room
temperature. A temperature sensor has been used to measure
the temperature of the room and the speed of the fan is varied
according to the room temperature. And the output will be
displayed in a lcd.
• BY this way, there will be no need of manual operation of a Fan
for ventilation.

3. COMPONENTS USED AND ITS COST:
Components used Cost in Rupees
12V DC motor (4500RPM) Rs.300
Arduino uno R3 Rs.990
TMP36 Temperature sensor Rs.120
Total expenditure will be less than
Rs.1500

4. BLOCK
DIAGRAM:

5. CONNECTION DIAGRAM:

6. DESCRIPTION & IMAGE OF SENSORS
USED:
A temperature sensor is an electronic device
that measures the temperature of its
environment and converts the input data into
electronic data to record, monitor, or signal
temperature changes. There are many
different types of temperature sensors. Some
temperature sensors require direct contact
with the physical object that is being
monitored (contact temperature sensors),
while others indirectly measure the
temperature of an object (non-contact
temperature sensors).
In this project, we use TMP36 temperature
sensor to get the readings of the room
temperature.

7. MICROCONTROLLER
USED:
ARDUINO UNO R3 :
The Arduino Uno R3 is a portable
microcontroller board based on a removable,
dual-inline-package (DIP) ATmega328 AVR
microcontroller. It has 20 digital input/output
pins.
Inexpensive - Arduino boards are relatively
inexpensive compared to other microcontroller
platforms.
Most microcontroller systems are limited to
Windows. Simple, clear programming
environment - The Arduino Software (IDE) is
easy-to-use for beginners, yet flexible enough
for advanced users to take advantage of as well.

8. OUTPUT UNIT:
DC MOTOR:
A DC motor is an electrical machine that converts
electrical energy into mechanical energy. In a DC motor,
the input electrical energy is the direct current which is
transformed into the mechanical rotation.
In this project, the DC motor acts as the motor propelling
the fan. Whenever the room temperature exceeds normal,
the change in temperature is analyzed by the Arduino and
make the motor run in the pre-defined RPM in
accordance with temperature.

9. SCREENSHOT OF THE PROJECT DESIGN:

10. SCREENSHOT OF THE OUTPUT:

11. CONCLUSION:
• This project could be used in kitchen, bathroom, also in
factories to have an Automatic ventilation.
• By this machine, the ventilation fans is no longer to be ran
always. So, electricity charges can also be conserved.

12. FUTURE WORKS:
• This project will be done in real-time and be applied in various
aspects for room ventilation.
• Also the blink software is to be implemented so that the user
could monitor and control the ventilation.

13. FOR REFERENCE:
• TINKERCAD LINK