Arduino-Keypad-Safe

A simple electronic safe using an Elegoo Uno, 4x4 keypad, 16x2 LCD, and a servo motor. The safe unlocks with a password and allows the user to set a new code.

Features

• Password-protected access
• Servo-controlled locking mechanism
• LCD user interface
• Option to create a new password
• Reset input using *

Components Used

• Elegoo Uno (Arduino Uno compatible)
• 16x2 LCD (parallel)
• 4x4 Matrix Keypad
• Servo motor
• Jumper wires
• Breadboard

Wiring Diagram

Watch Simulation

Click Here

How It Works

1. Enter the correct code on the keypad
2. Press # to submit
3. Servo unlocks the safe
4. After closing, re-enter the code to lock it again
5. Enter AAAA after unlocking to create a new password

Default Code

1234

Libraries Required

• Keypad
• LiquidCrystal
• Servo

Install them using the Arduino Library Manager.

Uploading the Code

1. Open Safe_Code.ino in the Arduino IDE
2. Select Board → Arduino Uno
3. Select the correct COM Port
4. Click Upload

Future Improvements

• EEPROM password storage
• Buzzer feedback
• Limit password length
• Hide input characters with *

License

This project is licensed under the MIT License.