Implementation Of Code Lock Using Microcontroller

Abstract

This project is developed for the users to use a high security door with remote control. It mainly consists of two modules named hand set and Door control. The hand set consists of a key pad and a multi channel RF transmitter. When the user presses a specific button, the RF transmitter transmits RF waves in a particular frequency. The door control consists of a multi channel RF receiver, microcontroller unit, LCD display and door. To open the door, the user has to give proper security code using the key pad in the hand set. The RF transmitter transmits RF signal according to the key pressed. The RF receiver receives the signal and sends to the microcontroller. The microcontroller analyses the code and controls the relays through driver section. The LCD display displays the user settings. This project gives high security to the user so that un authorized person cannot enter. The microcontroller used is PIC 16F73 and the microcontroller program is written in assembly language.

Existing System

Proposed System

Architecture

BLOCK DIAGRAM