[SOLVED] counter using external interrupt

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cyanpraveen

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i need to count number of time the LED gets turned off... for that i had used external interrupt... but the problem is when i call the interrupt the count increases by 2 when led turned on and it increase again 2 when turned off.

In debugger mode my program works prefectly.. but while displaying only this problem arises...

Could any body pls give me a solution
 

The external interrupt comes from a keystroke? If yes, your problem is a key bouncing, I think so.
One solution is using a sw debouncing
Send also your program and circuit here ...
 

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