🔢 4x4 matrix keypad input for entering a numeric password 📺 16x2 I2C LCD for real-time user feedback Green LED indicator on successful password entry Red LED indicator on failed password entry 🔊 ...

If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects, and the phone ...

Putting a custom designed electronic lock on your space seems like a geek right of passage. For our latest workspace, we decided to skip the boring numbered keypad and build a custom RGB backlit ...

An Arduino-based electronic access-control system developed during my university studies. The project combines RFID identification with keypad PIN authentication to create a two-stage access-control ...