help with current zero crossing detector

[Pooja k]

re:dual supply for op amps

Thanks for the advice. I'll do it right away. I'll just let you know the results. I assume that I'm in the right direction because I was beginning to doubt my design and I'm starting to to entertain some other ways of measuring power factor.

Hello
Have you detected the zero crossing of current??
If so please share the ckt diagram

 

[wkrug]

IMHO it is better to use a current sensor instead a transformer to measure the current.
A transformer can make some phase shift and so the measurement is faulty, or You have to compensate that.

Galvanic isolation is given too.
You can take a look to Allegro ACS 7xx series, or an other current sensor.

 

[ronsimpson]

some phase shift

All sensors have phase shift.

 

[Ian Rogers]

Please try not to revive 15 year old threads... The OP must be long gone by now...

Hopefully this NEW thread will work.