Dear Arif,

I just was glancing at the postings made by you and it was interesting :
89c51rd2; 4 digit up counter; 12 ch.IR; 89cx051; Programmer; Up counter with LCD; Oscilloscope; 8051BASIC; Code wanted for timer; and now it is AVR tutorial.

!!!

I think you are trying to enter the MCU domain, but when you find some topic tough to grab at, maybe in one sitting, you shift to the next. Happens to most in the initial phases and the temptation to look for "easy" things ( they dont exist anyway) is to be avoided.

At least now select your lane and STICK to it.

Raghu