A

Project based learning

Report on
“Password Protected Door Lock Using Arduino UNO”
Submitted in Partial Fulfillment of the Requirements for the Degree of
Bachelor of Technology
In
Electrical Engineering

Under Guidance of
Er. Akansha Kaushal

Head of Department
Dr. Deepak Nagaria

By
Rohit Singh (2300430200057)

Department of Electrical Engineering Bundelkhand Institute of

Engineering & Technology
(An Autonomous Institute)
Jhansi (U.P.) India - 284128

Session 2024-25
 CERTIFICATE
Department of Electrical Engineering
Bundelkhand Institute of Engineering & Technology
Jhansi (U.P.) India - 284128

I hereby declare the work presented in this project entitled “Password Protected Door Lock Using
Arduino UNO” in partial fulfilment of the award of degree of bachelor of technology in Electrical
Engineering submitted in the Department of electrical engineering , Bundelkhand institute of engineering and
technology , Jhansi Uttar Pradesh, India is my own work carried out under the guidance of Dr. Deepak
Nagaria head of department of electrical engineering and Er. Akansha Kaushal , Faculty of Electrical
Engineering

Head of Department:-
Coordinator:-
Dr. Deepak Nagaria
Er. Akansha Kaushal
Department of Electrical
Engineering
 Acknowledgement

Completing this assignment has been a remarkable journey, filled with challenges and learnings ,
and it would not have been possible without the support and contributions of many individuals. First and
foremost , I would like to extend my deepest gratitude to Er. Akansha Kaushal . Her insightful suggestions
unwavering cooperation, and dedicated support were invaluable throughout this project . Her guidance not only
helped shape the direction of my work but also inspire to strive for excellence . Without her expertise and
encouragement this assignment would not have reached its completion.

I also immensely thankful to the college staff ,whose wealth of knowledge and experience was generously
shared with me. Teir willingness to provide valuable information and their openness in sharing their insights
were crucial to the accomplishment of this assignment . Their contributions provide a solid foundation upon
which this project was built.

Additionally, I would like to acknowledgement all the members who contribute to this project .Their guidance
,support and collaboration were vital projects success whether through direct involvement or behind the sense
support their efforts have been deeply appreciated. I are grateful for the constant support, motivation, and help
received from everyone involved.
 Table Of Content
SR. NO TOPIC PAGE NO.

1. INTRODUCTION 5

2. COMPONENTS 6-8
• ARDUINO UNO
• MICRO SERVO
• LCD DISPLAY
• KEY PAD
• BUZZER
• CONNECTING WIRE

3. CIRCUIT DIAGRAM FOR CONSTRUCTION 10

4.
OBSERVATION & CONCLUSION 11

5. REFERENCES 12
 Introduction
Nowadays security is the main concern. Each and every individual needs to feel secure. The main entrances,
lockers, cabinets, etc should be protected with some kind of security systems. Doors locked using the
conventional locks are not as safe as they used to be in the past, nowadays anyone can easily break-in by
breaking these locks. The password-based door lock system allows only authorized persons to access the
restricted areas. The entire project is controlled by using the Arduino. A 4×4 or 4×3 keypad can be used to enter
the desired password.

Fig. 1
 COMPONENTS
ARDUINO UNO

The Arduino Uno is an open-source microcontroller board based on the Microchip ATmega328P
microcontroller and developed by Arduino.cc. The board is equipped with sets of digital and analog
input/output (I/O) pins that may be interfaced to various expansion boards (shields) and other circuits. The
board has 14 digital I/O pins (six capable of PWM output), 6analog I/O pins, and is programmable with the
Arduino IDE (Integrated Development Environment), via a type B USB cable. It can be powered by the USB
cable or by an external 9-volt battery though it accepts voltages between 7 and 20 volts. It is similar to the
Arduino Nano and Leona.

Fig.1

MICRO SERVO

A micro servo is a small, lightweight servo motor often used in projects requiring precise control of rotational
motion, such as robotics, RC models, and Arduino-based devices. Micro servos typically operate within a
standard 180° or 360° range of motion and are valued for their compact size and efficiency.
 Fig.2

BUZZER
A buzzer is an electronic signaling device that produces a buzzing or beepingsound. It is often used
in various applications, such as alarms, timers, and notification systems, to audibly alert or indicate
a specific event or condition.

Fig.3

CONNECTING WIRE

A wire is a thin, flexible strand or rod of metal, typically made of copper or aluminum, used for
conducting electricity or transmitting signals in electricalcircuits. Wires are essential components
in various electronic and electricalsystems, forming connections between components and enabling
the flow ofelectric current.
 Fig.4

LCD DISPLAY

An LCD display (Liquid Crystal Display) is a screen technology widely used in various devices, including
watches, calculators, TVs, monitors, and embedded systems. It operates by manipulating liquid crystals to
control the passage of light and form images or characters.

KEY PAD

A keypad is an input device used to enter data or commands. It typically consists of a matrix of buttons (keys)
arranged in rows and columns, commonly found in devices like ATMs, calculators, phones, and embedded
systems.
Circuit diagram for construction

Fig.5
 CONCLUSION

The password-protected door lock system is an effective and reliable method of securing access to a physical
space. It is simple to design and implement, making it ideal for small-scale applications like home automation
or office security.

• Advantages:
•
1. Ease of Use: Entering a numeric password is straightforward.
2. Low Cost: Uses readily available components.
3. Customizable: The system can be upgraded with additional features, such as RFID, biometric
authentication, or remote control.
4. Automation Potential: Integrates well with smart home systems for enhanced convenience.

• Future Enhancements:
•
1. Encryption: To protect against hacking during password validation.
2. Dual Authentication: Combining the keypad with biometric verification (e.g., fingerprint
scanner) for higher security.
3. Logging System: Tracks attempts and alerts the owner about unauthorized access attempts.
4. Wireless Connectivity: Allows remote management through a smartphone app.
 References
(1) https://sajet.in/index.php/journal/article/view/209

(2) Burgoji Santosh Kumar, “Implementation of Automatic College Bell Ring System Using
Arduino”, ISSN: 2393-8374, VOLUME-5, ISSUE-4, 2018

(3) A.C Jose, R. Malekian, "Savvy Home Automation Security: A Literature Review", Smart
Computing Review, Vol. 5, No. 4, pp. 269-285, August 31, 2015.

(4) http://wireless.ictp.it/wp-content/uploads/2012/02/BasicDoorbell-Project.pdf

(5) http://www.talkingelectronics.com/projects/WirelessDoorbell/WirelessDoorbell.html