🔐 Arduino Keypad Door Lock System A simple and effective security system using Arduino Uno, a 4x4 matrix keypad, and a relay-controlled electric lock. This project allows you to unlock a door using a ...

This Arduino project utilizes a 4x4 matrix keypad and a LiquidCrystal display to create a simple cipher system. Users can input strings via the keypad, and the system will display the string on the ...