Hi If you pick the “right” STM board, it can handle processing up around a megasample. It’s internal ADC’s are more of an issue than the sample rate. You can only do just so well on harmonics with a 12-ish bit ADC. Even if you go crazy and get one with a display, they still are pretty cheap.
Bob > On Mar 11, 2018, at 6:13 PM, Attila Kinali <att...@kinali.ch> wrote: > > On Sun, 11 Mar 2018 14:41:23 -0500 > Dana Whitlow <k8yumdoo...@gmail.com> wrote: > >> I'll have to take a look around to see if there isn't something cheap that >> can run >> standalone so I don't have to tie up (or wear out) a whole PC for the >> acquistion >> process. > > Blub... I should the whole mail....sorry about that. > > How about this: get a uC board (e.g. STM32discovery), replace > the crystal with a 10MHz input from your frequency reference. > Use the on-chip 12bit (really just 6bit) ADC to sample the > sine wave from your mains. Do phasor measurement in software. > > Probably any sampling frequency between 200Hz and 1kHz should > do the job, Which is slow enough so you can still handle the > samples with the uC alone and don't need any fancy DSP. > > > Attila Kinali > > -- > <JaberWorky> The bad part of Zurich is where the degenerates > throw DARK chocolate at you. > _______________________________________________ > time-nuts mailing list -- firstname.lastname@example.org > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- email@example.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.