DIY Digital Security System! ATmega2560, LCD, and Keypad Tutorial (Full Step-by-Step)

[What You’ll Learn] In this step-by-step tutorial, we fulfill a core engineering home task: Designing a circuit with a 16x2 LCD (LM016L) and a 4x4 Matrix Keypad. Storing and retrieving passwords using Non-Volatile EEPROM memory. Writing an "Access Granted" vs "Access Denied" logic in C. Interfacing hardware using 4-bit LCD mode to save GPIO pins. [Hardware Components Used] ATmega2560 Microcontroller LM016L LCD Display KEYPAD-SMALLCALC (4x4 Matrix) Yellow LED for success indicator [Software Tools] Proteus 8 Professional for simulation Microchip Studio (Atmel Studio) for C Programming #Mechatronics #ATmega2560 #ProteusSimulation #MicrochipStudio #AVR #EmbeddedSystems #EngineeringProject