hey im studyin for my final exam and have problems on converting octal-BCD conversion ,octal-decimal conversion,...gray code-binary.gray code-x3,hexadecimal-BCD..

 

So what are you having trouble with, understanding number systems? Convert everything to base 10, then to the other number system. That or go binary, which is a common denominator for most.

 

hey thanks..
i have a problem on converting everything to base 10....

 

I think you got your answer here - http://forum.allaboutcircuits.com/showthread.php?t=43616