YHDC current sensor - the theory please

Hi All,

I'm resuming a project I started more than one year ago; it is about to use a YHDC current sensor.

Attachment 10007


For now, I have a 16F18446 carrying a 12 bits ADC that I hope sufficient just to put me on the track and avoid the usage of an external higher resolution ADC chip adding "difficulties".

The YHDC sensor I have on my bench is a 100A:50mA model.

I found a lot of these drawings like this one below but I can't make them work or better said, I don't know how to "read" their output.

Attachment 10010



Do I have to sample let's say a 30 to 50 times or so to grab an alternance, find out both zero-crossing values (or as close as possible) and then extract the higher value in between?

What is the correct way to do this?

Thanks for any explanation on this one :wink: