The safety in the house is very important.This project presents a prototype smart door lock which can be used to enhance security of a door which is a smart door lock.Here we can utilize Bluetooth technology to scan Bluetooth Devices at the door knob for automatic door lock purposes.

2. ABSTRACT
The safety in the house is very important.This
project presents a prototype smart door lock
which can be used to enhance security of a door.
Here we are utilizing Bluetooth technology to
scan Bluetooth Devices at the door knob for
automatic door lock purposes.It searches for the
user and senses approach and automatically
unlocks the door, without having reach for the
phone. The microcontroller will read the signal
and verify the signal whether it is the right person
or not to open the door. Also there is an android
application which can be used to control various
appliances inside the house as well as door lock.

3. INTRODUCTION
 Security describes protection of life and property.The safety in the
house is very important. Besides the traditional method door that used a
key can be easily open by not authorized person or burglar if they have
the right key. This will allows them to steal the entire valuable thing in the
house.
Nowadays the telecommunication technologies become wider and more
new features exist to make human life better This project will use an
bluetooth feature in mobile phone to automatically open the door so that
bluetooth technology syncs your phone directly with the lock .
It will automatic open if authorized person is detected. The door will
open for a certain delay and the door automatically closes within this
time.

4. BLOCK DIAGRAM

5. HARDWARE
AVR
 AVR ( Advanced Virtual RISC)
microcontroller developed by Atmel in
1996.
 In this system we use Atmega 32
that has 32 kb of memory .
 It is fast and very easy to program
in C language

6. RFID
 Radio-frequency identification
(RFID) is the wireless use of
electromagnetic fields to transfer
data for the purposes of
automatically identifying and
tracking tags attached to objects.
The tags contain electronically stored information.
Some tags are powered by electromagnetic induction
from magnetic fields produced near the reader
Other types have a local power source such as a battery
and may operate at hundreds of meters from the reader

7. RELAY
A relay is used to isolate one electrical circuit
from another.
It allows a low current control circuit to make or
break an electrically isolated high current circuit
path.
Cd4016
 A bilateral switch which uses a
special CMOS circuit called a
transmission gate. The circuit
behaves as a SPST (single
pole/single throw) switch which is
under electronic control.

8. MAX232(voltage level converter)
The MAX232 is a dual driver/receiver and
typically converts the RX, TX.
The drivers provide RS-232 voltage level
outputs from a single + 5 V supply via on-chip
charge pumps and external capacitor

9. BLUETOOTH MODULE
Bluetooth is a high-speed, low-power
microwave wireless link technology,
designed to connect phones, laptops,
PDAs and other portable equipment
together
The technology uses modifications of
existing wireless LAN techniques but is
most notable for its small size and low
cost.

10. LCD MODULE
 LCD is a flat panel
display, electronic visual
display that uses the light
modulating properties of liquid
crystals.
 Liquid crystals do not emit light directly.
 LCD is more energy efficient than CRT and it consumes
less power

11. SOFTWARE
Atmel AVR Studio 5
It is small and resonabily simpler to learn
,understand,program and debug.
Compared to assembly language, C code written is more
reliable and stable.
 It is fairly efficient.
 It supports access to I/O and provides ease of management
of large embedded projects.
 Unlike assembly, C has advantage of processor-
independence and is not specific to any particular
microprocessor/microcontroller or any system

12. CIRCUIT DIAGRAM

13. ADVANTAGES
Using a smart door lock system has many of its own
advantages :
It's secure.
simple and easy to access
It’s pick-proof
Entire lock and electronics housing is well constructed
We can use multiple smart locks.

14. APPLICATION
 Control of doors and windows shutters
Faster operation and efficient.
 Security system
 This project can be used in Industries, Home, Office,
Shops.
Can be used for garage doors and gates.
By using smart app,disabled or elderly people can control
lock as well as appliances anywhere inside house.

15. FUTURE ENHANCEMENTS
In future there can be a smart phone application
enhancement for this project that is, creating a smart phone
app to give access to guests when person is away from his/her
home
 The others extensions within the app could also be
viewing who is passing through the door by adding the
camera and sending stream directly to mobile device
This can also extends to, if someone is trying to break
in the door, alarm will start beeping on mobile device as
well

16. CONCLUSION
 In this project, smart door lock system based on Bluetooth
which integrates the home security with home
automation..
 Home security system for automatic doors provides
advance security of today's standard for home owners.
 Since our proposed system is built over wireless sensor
network, it is a cheap, flexible, and easily installable
system without any overhead such as careful planning,
cabling, and construction works