📦 The 8051 4x4 Keypad Interfacing demonstrates how to connect and interact with a 4x4 matrix keypad using the AT89C51 microcontroller. Keypads are commonly used for user input in embedded systems, ...

This project utilizes an ESP8266 microcontroller to create a secure password entry system using a 4x4 keypad and a buzzer. The user can input a predefined password, and the system will indicate ...

Watch the video below to learn more about his Arduino-based portable keypad that connects to your Arduino development board and offers the complete alphabet, numbers 0-9 as well as several commands.