Category Archives: toroid winding

AC line current sensing (and logging)

I’ve been interested in (cheap) AC current measurement/sensing for a few years now.  The first driver was wanting to add whole house energy usage to the home monitoring system.  (I even got a Black & Decker EM100B strap-on electric meter … Continue reading

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Toroid winding (cheating method)

Toroids with many turns of secondary winding are very useful for AC current sensing and measurement because you can just pass the wire carrying the current to be measured thru them.  (We’re not talking about coils with a couple of … Continue reading

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