Need some help. I am currently working on a zero cross detector of mains using a tiny13. Can anyone give me a starter advice?
I have read the application notes, but still not sure how to manage the analog comparator or the external interrupts.
Any help will be highly appreciated!!

HI,

For what did you need the Zerocrossing Detection ?

I used the ZCD of Atmel in Application note AVR182, and i can say that works fine with sinusdioal Voltage.

Amper