Our object of making this project is for reducing the power consumption. And also to assist people who are disabled and are unable to control the speed of fan.

1. Project Associates :
JAGANNATH DUTTA (Roll No. 28100314029)
SUMAN MUKHERJEE (Roll No. 28100314059)
SUBHAM GHOSH (Roll No. 28100314049)
TEMPERATURE BASED FAN SPEED CONTROL &
MONITORING USING ARDUINO
Under the Supervision of
Mrs. D. RAY
Asst. Prof. in Dept. of E.C.E

2. OBJECTIVE OF PROJECT
Our object of making this project is for reducing the power consumption. And
also to assist people who are disabled and are unable to control the speed of fan.
It may also be used for monitoring changes in environment.
In near future, it can also be used in different industries and electronic devices.

3. CONTENTS:
INTRODUCTION
BLOCK DIAGRAM
HARDWARE EQUIPMENTS
ARDUINO UNO
TEMPERATURE SENSOR LM35
LCD 16X2 DISPLAY
DC MOTOR
CIRCUIT DIAGRAM
CIRCUIT DISCRIPTION
APPLICATIONS
ADVANTAGES
FUTURE SCOPE
CONCLUTION

4. INTRODUCTION
A simple introduction about the temperature controller circuit.
This circuit project is mainly used for indicating temperature ,
controlling temperature.
Microprocessor forms the processing part.
In temperature controller circuit, there are two parts consisting of
LM 35 interface with ARDUINO UNO.
LCD interface with ARDUINO.
The hardware circuit of temperature controller need the programming.

5. BLOCK DIAGRAM
FAN
(9V DC MOTOR)
LM35
A
R
D
U
I
N
O
UNO
LCD DISPLAY
(16X2)

6. HARD WARE EQUIPMENTS
Arduino UNO
Temperature Sensor LM 35
LCD Display
LED 16 X 2 Display
DC Motor 9V
Battery 9V
Resistor
Potentiometer
Capacitor
Transistor
Diode

7. ARDUINO UNO
The Arduino Uno is a
microcontroller board based on the
ATmega328 (datasheet).
It has 14 digital input/output
pins (of which 6 can be used as PWM
outputs), 6 analog inputs, a 16 MHz
crystal oscillator, a USB connection, a
power jack, an ICSP header, and a
reset button.

8. TEMPERATURE SENSOR(LM35)
The LM35 series are precision integrated-
circuit temperature sensors, whose output
voltage is linearly proportional to the
Celsius (Centigrade) temperature.
The LM35 does not require any external
calibration or trimming to provide typical
accuracies of ±1⁄4˚Cat room temperature.

9. LCD DISPLAY 16 X 2
LCD (Liquid Crystal Display) screen is an electronic
display module and find a wide range of applications.
A 16x2 LCD display is very basic module and is very
commonly used in various devices and circuits.
A 16x2 LCD means it can display 16 characters per line and
there are 2 such lines.
Two registers in use:- command register and data register.

10. DC- MOTOR
A DC motor is an electric motor that
runs on direct current (DC) electricity. In
any electric motor, operation is based on
simple electromagnetism.
A simple 2-pole DC electric motor (here
red represents a magnet or winding with
a "North" polarization, while green
represents a magnet or winding with a
"South" polarization).

11. OTHERS COMPONENTS
1k Resistor 9V Battery
1K Potentiometer
capacitor-10uF
Diode-1N4007
Transistor-BD139
LED

12. CIRCUIT DIAGRAM

13. CIRCUIT DESCRIPTION
As we have a look into the circuit diagram, we have seen that the 16x2
LCD panel indicates the output result to show. The 1k potentiometer is
connected to the 3 no pin of that LCD panel to control the intensity of
brightness.
The main portion of the LCD panel is connected to the Arduino Board with
pin 2,3,4,5,6 and 7 of UNO. The pin 8 of Arduino is connected to the LED
indicator to indicate the peak level of temperature and fan speed

14. The pin 11 is connected to the capacitor which controls the fan speed intensity.
The capacitor discharges through the transistor BD139. The transistor get biased
through this capacitor and then controls the fan speed. The diode IN4007 acts as a
switch to stop the fan below a certain cut-off level.
The temperature input is given to the pin A0 of Arduino from pin 2 of LM35.
Contd..

15. At Room Temperature:

16. Personal computers
Exhaust fans in large hotels
Washing machines
CD and DVD players
The circuit can be used for Car Engine to reduce the heat.
This project can be used in Home.
This project can be used in Industry.
This will help in saving the energy / electricity
APPLICATION

17. It is very economical and easy to handle by the user.
Speed varies automatically, so that it controls the speed without using it manually.
It is help full to disabled People.
It is very easy to install in offices, houses etc.
Save energy by slowing down its speed in low temperature.
ADVANTAGES

18. The project will concentrate on electric standing fan rather than other type
of fan such as ceiling fan
We can monitor more parameters like humidity, light and at the same time
control them.
We can send this data to a remote location using mobile or internet.
We can draw graphs of variations in these parameters using computer.
When temperature exceeds the limit, a call will be dialed to the respective
given number by an automatic Dialer system.
FUTURE SCOPE

19. This paper elaborates the design and construction of fan speed control system
to control the room temperature. The temperature sensor was carefully chosen
to gauge the room temperature. Moreover, the fan speed will increase
automatically if the temperature room is increased. As conclusion, the system
which designed in this work was perform very well, for any temperature
change and can be classified as automatic control.
CONCLUTION