This document presents a project on an RF-based door lock system. The system uses an RF transmitter connected to a keypad to send a password via RF signals to an RF receiver connected to a microcontroller. If the password is correct, the microcontroller activates a relay to unlock the door. If incorrect, an alarm is triggered. The system has applications for securing bank lockers, vehicles, and other devices due to its low cost, wireless operation, and prevention of hacking.

1. Presentation on
RF Based Door Lock System
Satpriya group of institution
SUBMITTED TO :- SUBMITTED BY:-
MR. AJAY KHOKHAR SIKANDER
H.O.D IN ECE DEPT. 10/ECE/72
SPGOI (3410897)

2. Introduciton
• RF based door lock System is a project,
which is used for security purpose to Bank
lockers, Automobile vehicles etc.

3. Embedded system
• Embedded system is the combination of
hadware and software part which perform
a well defined task.
They are used in
1.Consumer electronics
2. Telecommunication
3. Security etc.

4. Different Embedded Based
Devices

5. Project
• Wireless Code Locking System is a project,
which is used for security purpose to Bank
lockers, Automobile vehicles and etc.
• By using this code locking project, we can set a
code for locking or opening that device, first a
code will be provided to lock and unlock. That
code will be a numeric data from ‘0’ to ‘9’. A
virtual wireless keypad will be provided in the
circuit with LCD display.

6. Explanation
• We have keypad which is connected for
entering the password, which is interfaced
with microcontroller through wireless RF
transmitter. We have one wireless RF
receiver which is interfaced directly with
Alarm and Relay. When we enter the
password through keypad on Transmitter
unit, the receiver receives the password
and compares that password. If password
is not matched, alarm for indication.

7. When it goes above three times it will
disappear from the LCD. And it will
generate a long alarm. When you give
correct entry, the controller will ON relay
for access the external device. But
Password is wrong in receiver side alarm
will be active.

8. Methodology
• This project is designed by following
blocks
• Microcontroller.
• LCD display.
• Encoder with RF transmitter.
• Decoder with RF receiver
• Motor
• Alarm

9. Microcontroller 8051
• is defined as combination of Microprocessor & its
external units.
– Inbuilt RAM
– Inbuilt ROM
– Inbuilt I/O ports

10. Specification of 8051
• 8-bit processor
• 128-byte of RAM
• 4-Kilobyte of onchip ROM
• Two Timers
• 4 I/O ports
• 1 Serial port
• 6 interupts

11. Pin Diagram of 8051

12. RF Transmitter
• The 212 encoders are a series of CMOS
LSIs for remote control system
applications. They are capable of
encoding information which consists of N
address bits and 12_N data bits. Encoder
(HT12E)

13. PIN Diagram of RF Transmitter

14. RF Reciever
• The 212 decoders are a series of CMOS
LSIs for remote control system
applications. They are paired with
Holtek_s 212 series of encoders. The
decoders receive serial addresses and
data from a programmed 212 series of
encoders that are transmitted by a carrier
using an RF or an IR transmission
medium. Decoder (HT12D)

15. Pin Diagram Of RF Reciever

16. LCD display
• LCD module have 8-bit data interface and
control pins. One can send data as 8-bit or
in pair of two 4-bit nibbles. To display any
character on LCD micro controller has to
send its ASCII value to the data bus of
LCD. LCD display used here is having
16x2 size. It means 2 lines each with 16
character. Lcd display (16x2)

17. Pin Diagram of LCD

18. Advantage
• Compatible size.
• Low cost.
• Easy to implement on any device.
Wireless.
• It is used to prevent from hacking

19. Application
• Used in many security systems like Bank
locker, Automobile vehicles, door opening
and closing...etc. It can be used in any
security. It protects any device and is very
secured.

21. Top view