Description
This is a very simple project of password authentication by Arduino. LCD and keypad will be connected to Arduino. I will have one fixed password. In this project, I have used a 4 digit password. By pressing keys from the keypad LCD will display an asterisk (*) instead of an entered number (because we don`t want to show passwords to others). If the user enters the correct password it will display an unlocked message otherwise LCD will simply display a message for the wrong password.
Required components
- Arduino UNO
- 16×2 LCD
- 4×4 Keypad
- Jumper wires
- Power supply or DC Adapter for Arduino
Circuit diagram
16×2 LCD is connected to pin A0-A5 of Arduino. 4×4 Keypad is connected to pin D6-D13 of Arduino, from keypad key A will be used for lock key B will serve the purpose of unlocking.
Code
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Video
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