DESIGN AND CONSTRUCTION
OF
SECURITY SYSTEM WITH USER
CHANGEABLE PASSWORD
ABSTRACT
The main objective of this project is to provide a security system with a provision to change the password
by an unauthorized person only. This proposed system provides a user friendly security system for
organizations and homes. This system is a password based and allows only authorized person to access it
with the password. The system is fully controlled by an Arduino, a password is stored in the EEPROM of
the board which is possible to be changed anytime unlike a fixed password burnt permanently to the
controller. A keypad is used to enter the password and a servo motor is interfaced to the microcontroller
to lock or unlock the electric door, any wrong attempt to open the door by entering the wrong password,
an alert will be indicated and will be displayed on the lcd screen.
s/n
1
2
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9
10
Materials
Arduino board
Servo motor(iron gear)
Keypad
LCD
Buzzer
Transformer
diodes
Lm7805
Miscellaneous
Casing and codings
Quantity
1
1
1
1
1
1
4
1
TOTAL
Cost
6500
9500
2500
2000
300
2000
40
350
7000
9,000
39,190