The purpose of our project is to build a password based door lock system using 8051 microcontroller. Password based lock systems are very popular now-a-days because of their simple yet very effective applications. Password based systems are replacing traditional key and lock based system and password based lock systems are also more secure and user friendly than the traditional Key based systems. This folder contains the proteus simulation file and the hex file of embedded c code that is needed to build and operate the system