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Power Factor Sensing Schematic

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peezmt

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I need Power Factor Sensing or Detection Schematic in Line Voltage 220V
Please help me
 

you have to detect zero crossing of voltage wave and current wave,
then calculate the phase difference as power factor.

or try to using this chips SA9903B (see the data sheet)

regards
Dian
 

**broken link removed**
<als>
 

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