This Arduino code implements a password entry system using a 4x4 keypad and a 16x2 I2C LCD display. Users enter a numeric password, which is then validated against a predefined password.

Password Based Door Lock System 🔐 This is a password-based door lock system using an Arduino Uno, 4x4 Keypad, and a 16x2 LCD display.

[Andrea] just sent us this great student hack he made for his room. He’s constructed an Arduino keypad door lock — without using any proper fastening hardware! The entire build is made … ...

[Andrea] just sent us this great student hack he made for his room. He’s constructed an Arduino keypad door lock — without using any proper fastening hardware! The entire build is made out of ...

Makers and developers that enjoy creating projects using the Arduino platform may be interested in a new shield for Arduino that incorporates an LCD JEMshield++, keypad and enclosure all in one ...