i want you to help me in a program for interfatcing hex key pad with8051 and then make a digital lock
Kindly guide me as to how to combine the two different programs. thanks

Just down the project and go through the code yourself. If you need help, just post a question. You can also look into our tutorial section for keypad tutorial.

sir in the above shown program where are you going to dtore new password.
as you have not shown any memory ic

@navig, This project does not store password in non-volatile memory. It just stores the password in RAM and if controller resets password also resets. You can add an EEPROM to add saving password to EEPROM.

Sir. kindly upload the proteus file. i want to complete schematic diagram. thank you

HOW TO CHANGE THE LOCK CODE