This document describes a security system project that uses an ATmega 16 microcontroller. The system asks visitors to enter a password at the door and will only open the door if the entered password matches the programmed password. It uses a keypad and LCD for user input and output, connected to the microcontroller. The microcontroller controls motors to open the door if the correct password is entered.

1. USING ATMEGA 16 μc

2.  The aim of this project is to create a security system
which asks for a password before opening the door
and opens the door only if the password matches the
programmed keyword. Motors are connected to open
the door which in turn are controlled by the processor
residing in the security system.

3. 1. ATMega 16 microcontroller
2. Basic calculator keypad
3. 2x16 LCD
 Keypad and LCD are connected with microcontroller to
make an easy man-machine interface to make the
calculator capable of performing the desired function.

4. ATMEGA 16 μc
2x16 LCD
Keypad
Motor

7. • Move data to LCD port
• Select command/data register as
required
• Select write operation
• Send enable signal
• Wait for LCD to process the
command

8.  This system works as follows to open the door:-
1. Asks for the visitor to enter the Password.
2. If entered password matches the programmed one
then it glows the indicator and run the motors to
open the door otherwise takes the programmed
action.