/diy/ - Do It Yourself

>>2526481
>no corrosion
>shiny solder joints
It's not gore at least. It's a lot better than my janky repairs, picrel.

>>2526484
Gotta multiply instantaneous current by instantaneous voltage, and make some sort of weighted running average. Probably using DSP, since analogue multiplication is hard. Also consider a transformer or isolated ADC+divider for mains voltage, to prevent the majority of your digital circuitry from being mains referenced. A differential amplifier measuring live-neutral and referencing it to ground also works. Naturally you'll need anti-aliasing filters to obey the nyquist sampling theorem on both ADC inputs. Figuring out the power factor and reactive and apparent powers would just be a software problem.

As for the sensor itself, hall or shunt would be my desire, as current draws aren't necessarily symmetrical around 0V (see half-wave rectifiers).

>>2526625
Chances are it's some other chink optocoupler with different badges on it. May want to look on LCSC for other optos with a similar package.

>>2505417
screw it, this will have to do.