We are going to use a microcontroller of 8051 family.
Password based door lock system block diagram.
If any unauthorized person enters a wrong password in an attempt to open the door then this system immediately switches a buzzer.
If another person arrives it will ask to enter the password again.
If the password is wrong then door would remain l ock ed enyi.
Block diagram of password based door locking system a.
Reading the digital input from keypad.
The keypad is an input device that helps to enter a code to open the door.
This system demonstrates a password based door lock system using arduino uno wherein once the correct code or password is entered the door is opened and the concerned person is allowed access to the secured area.
Traditional lock systems using mechanical lock and key mechanism are being replaced by new advanced techniques of locking system.
After extending the unlocking process for a fixed period of time the relay energizes and then the door gets locked again.
This block gives the entered code signals to the microcontroller.
In this password based door locking system project a keypad is arranged to open and close the door.
The various functions of microcontroller are like.
Password based door lock system using arduino simulino uno schematic diagram read smart phone controlled home automation using arduino the key pad library for the arduino uno available in this link keypad this library is setup to do every function for the keypad.
After entering a password if it matches with the stored one then the door will unlock for a limited period of time.