anil kumar wrote:
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iam not really into hardware,so i dont know much about the circuits.


no , you are, my dear friend. never expect every thing. Mr. karas showed you the way, now respond to it positively by doing all the exercise to understand that. i'm not saying this because you cannot get the answer, but it will not be beneficial to you as it puts you to the bad habbit of spoon feeding.


abhishek