2. CONTENTS
● Introduction
● Motivation
● Objectives
● Requirements
● System Architecture
● Circuit Diagram
● Working
● Advantages and Applications
● Code and Implementation
● Conclusion
● Future scope
● References
3. INTRODUCTION
● This password-based door lock system allows access to
only authorized persons .
● It can be mounted to any of the existing doors .
● Less complicated components & embedded software are
used in this project.
● System is based on Arduino Uno along with a keypad , an
LCD and a Micro Servo.
4. MOTIVATION
● Today’s main concern is SECURITY.
● Conventional locks are not much safe.
● Rate of crime and intruders is increasing day by day.
● Access should be restricted to limited people.
5. OBJECTIVES
● To ensure better safety at residential places
● To give access of highly secured places in an organization
with only authorities
● To provide users more secure yet cost-efficient way of
door locking
12. WORKING
● Arduino compares the original set password and the passkey
which we enter.
● The operation code is dumped into the Arduino board using the
dumping cable.
● LCD displays “Enter Password”.
● We enter passkey using keypad and passkey is displayed on
LCD.
● For correct passkey, LCD displays “Door is Open” and for wrong
“Access Denied” so door remain locked.
13. ADVANTAGES
● Simple programmable code lock circuit.
● Major components are only LCD, Keypad, Arduino,Micro servo.
● User can set his password for ensured protection instantly.
● Power required to operate this circuit is very less.
14. APPLICATIONS
● Used in doors of houses.
● Used for vehicles.
● Used for jewellery or money boxes.
● Used in secured offices and wherever security is needed.
16. CODE
void loop()
{
if (door == true)
{
customKey = customKeypad.getKey();
if (customKey == '#')
{
lcd.clear();
ServoClose();
lcd.print("Door is closed");
delay(3000);
door = false;
}
}
else
Open();
}
void loading (char msg[]) {
lcd.setCursor(0, 1);
lcd.print(msg);
for (int i = 0; i < 9; i++) {
delay(1000);
lcd.print(".");
}
}
void clearData()
{
while (data_count != 0)
{
Data[data_count--] = 0;
}
return;
}
17. CODE
void ServoClose()
{
for (pos = 90; pos >= 0; pos -= 10) {
myservo.write(pos);
}
}
void ServoOpen()
{
for (pos = 0; pos <= 90; pos += 10) {
myservo.write(pos);
}
}
void Open()
{
lcd.setCursor(0, 0);
lcd.print("Enter Password");
customKey = customKeypad.getKey();
if (customKey)
{
Data[data_count] = customKey;
lcd.setCursor(data_count, 1);
lcd.print(Data[data_count]);
data_count++;
}
if (data_count == Password_Length - 1)
{
if (!strcmp(Data, Master))
{
lcd.clear(); ServoOpen(); lcd.print(" Door is Open
"); door = true; delay(5000);
loading("Waiting"); lcd.clear(); lcd.print(" Time is
up! "); delay(1000); ServoClose(); door = false;
}
else{
lcd.clear();
lcd.print(" Wrong Password ");
door = false;
}delay(1000);lcd.clear(); clearData();}
}
18. IMPLEMENTATION
Link to Tinkercad : https://www.tinkercad.com/things/idKgClcD9yw-mighty-bombul-
jaban/editel?sharecode=wXB5NROP9SFsuUKz6U3VDD9_fe83ra-zZdH3oDqZXC8
19. CONCLUSION
● This digital code lock is very marketable because it is easy
to use.
● Comparatively inexpensive due to low power
consumption and highly reliable.
● This is most prevalent form of digital lock as it uses
numerical code for authentication.
● The code lock is therefore particularly useful in door locks
and equipment locks.
20. FUTURE SCOPE
● This project can be further extended by adding GSM
module, so that owner will receive the message to his
mobile, whenever the lock is being authenticated.
● This helps the locking system to be more secure.
● Also, we can keep a count for wrong entries of passkey,
such that the lock will be permanently locked if the count
reaches and it can’t be opened until the owner resets it.
