Hi Jim
Well you are correct why not loop around, as powersaving is not the main concern here and truly this is just for the sake of understanding how to wake up from sleep mode with interupt.
As I am a beginner and try to work out all the if, but and why some things may make no sense.
So thanks again and we put this one to sleep
guido
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[AVR_Chat] Interupt ATtiny
2009-04-21 by Guido Helmstetter