Sharanbasva university
faculty of engineering and technology kalaburagi.
“AUTOMATIC ROOM LIGHT/ FAN CONTROLLER”
UNDER THE GUIDANCE OF
PROF.SANJUKUMAR BIRADAR
ARADHANA [SG18EEEOO5]
KAVANA KATTI [SG18EEE020]
S.AYESHA NIMRA [SG18EEE043]
SHALURANI NAYAK [SG18EEE044]
MUSKAN IRAM [SG19EEE506]
introduction
The main intention of Automatic room light or fan controller is to
design a system to control the turn ON and turn OFF of light/fan
according to human presence in room.
When a person enters the room, count would be increased,
whereas on leaving, the count would decrease.
IR Sensing mechanism is used to sense the entry and exit of
visitors and the whole counting operation is done by a ARDUINO.
The model will receive the signals through the IR sensors and this
signals will be operated under the control of software Arduino UNO
Components required
ARDUINO UNO
200( OHM) RESISTOR
IR SENSORS
16x2 LCD DISPLAY
BREADBOARD
CONNECTING WIRES
LED
Arduino UNO:
The Arduino Uno is
an open-
source microcontroller
board.
The board is equipped with
sets of digital and
analog input/output (I/O)
pins.
It can be powered by the
USB cable or by an
external 9-volt battery,
though it accepts voltages
between 7 and 20 volts.
IR SENSORS:
A infrared sensor is an
electronic sensor that
measures infrared (IR) light
radiating from objects .
They are most often used in
motion detectors.
PIR sensors are commonly
used in security alarms and
automatic lighting
applications.
IR sensors are commonly
called passive infrared
sensors "PIR", or sometimes
"PID", for "passive infrared
detector
16x2 LCD Display:
LCD (Liquid Crystal Display)
screen is an electronic display
module.
A 16x2 LCD means it can display
16 characters per line.
In this LCD each character is
displayed in 5x7 pixel matrix.
This LCD has two registers,
namely, command and data.
Resistor:
• A resistor is a passive two-terminal
electrical component
• In electronic circuits, the resistors
are used to reduce current flow.
• It is also used adjust signal levels,
to divide voltages, and terminate
transmission lines etc.
• we are using a 200 ohm resistor in
our circuit.
LED:
LED is a semiconductor light
source that emits light when
current flows through it.
Electrons in the semiconductor
recombine with electron holes,
releasing energy in the form of
photons.
LEDs are used in applications
like automotive headlamps,
general lighting, traffic signals,
camera flashes, lighted
wallpaper, and medical devices.
Block diagram
Circuit diagram
Working principle
Automatic room light/fan controlling system consist of two IR
sensors , Lcd, arduino uno,led/fan,200 ohm resistor.
The two IR Sensor are termed as one gate (in) and another
gate (out) and continuously senses the presence of any
obstacles (a person in our case)
If IR Sensor 1 senses a person, it informs the controller that a
person has entered so that the controller can increment the
count on the LCD and the light/fan gets turned ON.
When the person leaves the room from the second gate (out)
there will be decrement on the LCD and when there will be no
person left inside the room the light/fan automatically gets
turned OFF.
Hence the working takes place through IR sensors and
automatically controlling the room lights/fan.
advantages
Low cost
Easy to use
Can be implemented in single door
Can be used for electricity saving purpose
Can be used for automatic room light/fan
control.
applications
For electricity saving purpose
For automatic room light control
It can be used at malls,classrooms,theatres and other places
to keep a check on the number of person entering a secured
place and gaurding the electrical appliances
It can also be used as home automation system to ensure
energy saving by switching on the loads on the loads and fans
only when needed.
result
The motive of this project “ AUTOMATIC ROOM LIGHT/FAN
CONTROL” is to control lights and fans of any
room/malls/classrooms etc by using IR sensors . when theIR
sensors senses the in and out of a person by the increament and
decrement on the LCD display screen the automatic control of
light/fan gets controlled and electricity gets saved too.
references
https://www.elprocus.com/know-about-working-of-automatic-
room-light-controller-and-applications/
https://www.electronicshub.org/automatic-room-lighting-
system-using-microcontroller/
https://www.projectsof8051.com/automatic-room-light-
controller-with-visitor-counter/
https://www.slideshare.net/mobile/Ankitkumar1080108/auto
matic-room-lights-controller-using-arduino-pir-sensor
