zero detector

[edybahia]

Good Morning Folks, I apologize because I do not speak English, so I am using the google translator to help :-)

Need to develop software to detect the passage of zero for a load control via PWM, someone could help me, I need to develop it as an academic, I have some knowledge in PIC

Then if someone has developed something like that and be able to help, I will be grateful.

[asmboy]

why not try the SEARCH feature with this search ??

zero crossing

here is a recent Zero cross design i found elsewhere a few days ago

http://www.ccsinfo.com/forum/viewtopic.php?t=45363&highlight=zero+crossing

BTW- got code to show what you will do with the information?

[SherpaDoug]

This Microchip application note explains the how and why of a very simple zero crossing detector.

http://ww1.microchip.com/downloads/en/AppNotes/00521c.pdf

Some people will add many layers of protection, but if you want an academic understanding of what is required this app note explains the fundamentals in two pages.
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[edybahia]

Hello friend, I managed to make the zero detector code. Someone could help me adjust the PWM of the same ?