DC voltmeter using multiplexed 7 segment display

This is a DC voltmeter 

• Atmega8 MCU is used 
• The range is 0V to 24V 
• The range could be extended using a proper voltage divider circuit and a simple change in code 

Ckt & code are here https://drive.google.com/file/d/0B8PCKc-8AIcDWnZaLVpNN3VuMVU/edit?usp=sharing