Hello guys.

I need to monitor the power consumption on the mains. I googled and found 
one can use current transformers but they are very expensive and not easily 
available in my region (Italy). Besides with this technique a full bridge 
rectifier is also needed and as I understand, there's a treshold current you 
cannot measure.
My need is to measure from 100mA (that is 22 W @ 220V) to 30A (actually I 
need 5KW) with a resolution of 100mA. should I wind the transformer myself, 
and how? Any other idea?

Many TIA.

Alessandro Queri 

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