Measuring motor current (anyone tried this?)

[billbo911]

Originally Posted by EricVanWyk

Cool idea, but not feasible with the current PD hardware (ask again in ~3 years ). The sensing circuit you refer to is super cheap and doesn't actually measure the current. You can check it out, per Joe's suggestion, if you'd like. Its just a FET being used as a comparator, plus some protection.

Yep, that is what I was afraid of. Now that I've seen the schematics, I agree 100%, that circuit will not allow a measurement with any meaning.
Now, if the breaker had a few hundred ohms of resistance...... it would not be a breaker , but you could then measure a nice proportional voltage. But then again, you knew that.
Well, like I said, it was just a thought.


BTW Eric, are you saying there is a new PDB in the works???