This document describes an automatic temperature-controlled fan project using an Arduino Uno microcontroller. The fan will automatically turn on when the temperature reaches 35°C as measured by a temperature sensor, and will turn off again when the temperature drops below 35°C, in order to regulate the environment and reduce energy consumption. The system includes an Arduino, temperature sensor, LCD display, DC motor fan, battery power source, and connecting wires. Potential applications include use in homes and industries to assist people and save electricity by automating fan control based on temperature changes.

1. Waqar Shehbaz
Mechanical Department
UET Peshawar Pakistan

2.  Automatic fan control with temperature changes.
 To reduce the power consumption.
 To monitor changes in environment.
 To assist people who are disabled to switch ON
and OFF the fan.
 To get familiar with automatic temperature
measuring instruments.

3.  Temperature dependent fan
controller uses temperature
sensor to sense the
temperature changes and
provide output according to
the instructions.
 We have provided minimum
temperature of 35°C upon
reaching that temperature or
above, the fan will
automatically start.
 When temperature falls
below 35°C, the fan stops.

4. 1. ARDUINO UNO CONTROLLER:
The Arduino Uno is a
microcontroller board contains
everything needed to support the
microcontroller; simply connect it to
a computer with a USB cable or
power it with a AC-to-DC adapter or
battery to get started.
2. TEMPERATURE SENSOR:
It is an integrated circuit sensor that
can be used to measure temperature
with an electrical output proportional
to the temperature (in oC)
3. LCD(liquid crystal display):
It displays the sensed temperature.
4. DC motor:
A 6 volt dc motor is used to replace
the fan and works according to the
temperature changes.
5. Voltage source:
A 9 volt battery is used as a voltage
source.
6. Connecting wires:
Two types of wires are used in the
whole setup.
1. Male to male.
2. Male to female.

5.  APPLICATIONS:
1. This project can be used
in Home.
2. This project can be used
in Industry.
3. This will help in saving
the energy / electricity.
4. To assist people who
are disabled to switch
ON and OFF the fan.
5. Suitable for abrupt
changes in
environment.
 FUTURE SCOPE:
1. We can monitor more
parameters like
humidity, light and at
the same time control
them.
2. Can be applied to all
those situations which
are temperature
dependent.