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:
Keypad: The user will enter the password using the keypad. Various keys of the keypad are: I. 0 to 9 II. Enter III. Escape
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.
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:
Project Report in pdf format and in word format ( .doc or .docx )
Circuit diagram
PCB layout
Microcontroller Program in assembly language
Hex file of the Microcontroller code
Datasheets of all the components / ICs used in the project
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:
We can use this project in industries and offices.
We can use this project in our home as well.
Advantages:
The user need not carry keys every time with him/her.
Future Development:
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.