are you referring to the capacitor I used to stabilize result?

Its just decoupling capacitor of reasonable value (1uf or above) to filter supply fluctuation at sensor’s end. (between +ve and ground)

Thank you for your fast response , unfortunately I´ve been busy all week and read it now . I´ll be on it my next free times , so I hope to tell you soon how I solved it .

Kind regards

As per my knowledge, yes, Since AC712 isolates measuring side from other circuit, it should be able to make a watt meter out of it. You would have to look into ac measuring code though, as measuring ac is a bit different than ac, where you may have to average the rise and falls. Google out, i feel there is code examples available for this. When working with AC do take safety measures and do double check my info. Would love to hear updates on your project. Goodluck.

The led driver has a potentiometer for adjust power and I would like to knows how many watts am I using at the different positions .

Great – Enjoy 🙂

Regards
Arif S.

well try this, just change sensitivity 0.185 to sensitivity of 30amp version, If i remember it can be found on some forum.

in short. change sensitivity 0.185 to desired sensor sensitivity

Thanks for your code. Its a great help.
So, if I am using ACS712 (30A), then my current resolution comes around 74mA (which I have calculated from the formula mentioned in “Mathematics involved in ADC conversion” of the above link ). Can you please explain the meaning of this?

Thank you!