DC voltmeter using character LCD

This is a DC voltmeter 

• Atmega8 MCU is used 
• voltage is shown on the character LCD 
• Scienceprog.com 's LCD library is used 

Ckt & codes are here : https://drive.google.com/file/d/0B8PCKc-8AIcDQVZKcTlrT3V5SDg/edit?usp=sharing