Hello friends! In this tutorial, we will study an electronic quiz project with the 8051 microcontroller. The project combines a keypad, a character LCD and serial communication to create a small question-and-answer game. You can play alone or compete with a second player who enters answers through a computer terminal. We will begin with the game rules, because the circuit only becomes useful when its behavior is clearly defined. Then we will follow the connections, organize the firmware and examine question selection, scoring and input handling. These are useful skills for menu systems, classroom projects and other embedded applications that accept input from more than one source. The original project used an AT89C51, a 20x4 LCD and a 4x4 keypad in Proteus. Its screenshots and demonstratio ...