Microcontroller based Digital Code Lock

Project Cost: 5,600

Project Code: 1106

Description of the project:

Microcontroller based Digital Code lock project opens a door-latch when a correct password is entered through a keypad. Opening the door latch is shown using a stepper motor or DC motor. The user can change this password anytime he/she wishes using a keypad. And if a wrong password is entered for more than 3 times, then a buzzer is turned on.

Description in detail:

The main blocks of this project are as below:

1. Keypad: The user will enter the password using the keypad. Various keys of the keypad are: I. 0 to 9 II. Enter III. Escape
2. LCD: We are going to use a 16×2 alphanumeric Liquid Crystal Display (LCD) which means it can display alphabets along with numbers on 2 lines each containing 16 characters.
3. Microcontroller: Central processing unit – CPU of this project. The microcontroller used is 89s51.

The following are the various functions of the Microcontroller:

• Reading the digital input from Keypad.
• Sending this data to LCD so that the person operating this project should read the password.
• Sensing the password using a keypad and check whether it is a correct password or a wrong password and rotate the stepper motor if the password entered is a correct password.
• Sending the data to the computer using a serial port. This data consists of the status of entered password (Correct/wrong)

Video of the project: Microcontroller Based Digital code Lock

Block Diagram:

You will get the following documents with this project:

1. Project Report in pdf format and in word format ( .doc or .docx )
2. Circuit diagram
3. PCB layout
4. Microcontroller Program in assembly language
5. Hex file of the Microcontroller code
6. Datasheets of all the components / ICs used in the project
7. Power point presentation / PPT file

Tags: Door access system, Digital code lock, Keyless entry to the home

Photographs of the Microcontroller based Digital Code Lock project:

Applications of the Microcontroller based Digital Code Lock project:

1. We can use this project in industries and offices.
2. We can use this project in our home as well.

Advantages:

1. The user need not carry keys every time with him/her.

Future Development:

1. We can add a voice alert system.

Questions and answers about this project:

Question: Can you provide a Relay at the output? Can you change the output device from the stepper motor to a DC motor?

Answer: Yes, both options are possible. We can provide DC motor as well as a Relay as an output device.