Here is a project for beginners using Atmel AVR ATmega8. The project uses some techniques that are very useful for designers to learn and utilize.

• Alphanumeric LCD Module Interfacing.
• 4×4 Keypad interfacing.
• PWM Control of LED (Used to dim the back-light of LCD, like in some Nokia Phones)
• Basic Circuit design for AVR MCUs
• Connecting relays and other current demanding devices.
• AVR Studio and project management.
• compiling using free avr-gcc compiler.
• Using eXtreme Burner – AVR to burn hex code to AVR MCU.

sumber : http://extremeelectronics.co.in/avr-projects/avr-project-atmega8-based-smart-code-lock/