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Password Based Door Locking

Description:
Main concept behind this project is of a door-latch opening using a password entered through keypad. As well as sending this data to a computer through serial port. User can change this password anytime he/she wish using a keypad


Block Diagram:


Description:
It mainly consist of following blocks
1. Microcontroller: This is the CPU (central processing unit) of our project. We are going to use a microcontroller of 8051 family. The various functions of microcontroller are like: I. Reading the digital input from Keypad II. Sending this data to LCD so that the person operating this project should read the password III. Sensing the password using keypad and to check whether it is a correct password or a wrong password and rotate the stepper motor if the password entered is a correct password. IV. Sending the data to the computer using serial port. This data consist of the status of entered password (Correct/wrong)

2. LCD: We are going to use 16x2 alphanumeric Liquid Crystal Display (LCD) which means it can display alphabets along with numbers on 2 lines each containing 16 characters.

3. PC Interfacing: We are going to use max 232 IC for pc interfacing, the values of number of persons inside the room and the status of entered password (Correct/wrong) will be sent to pc.

4. Keypad: User will enter the password using the keypad. Various keys of keypad are as following,
I. 0 to 9
II. Enter
III. Escape



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    rushi.8051 [at] gmail [dot] com
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