Reply To: Current limit Stepper drivers drv8825

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So are you saying the output is something like a rectified sine wave, with the peak at Vref/2, and subsequently RMS is the DC component measured by the meters?

Did you try measuring the current with the meter in AC mode? I didn’t try that… I’m not sure what it would read, on a rectified wave, but if it’s 0A then that’s not it.

I’m inclined to not try that, because I like the solution you’ve come up with so far, and it makes me happy to think that’s the truth 🙂 .

Also, it probably doesn’t matter, but the R100 is 0.1 Ohm, not 100 Ohm, in case you are trying to calculate the loss of that resistor too.