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1. Andrew (cinebox@hackers.town)'s status on Monday, 27-Feb-2023 06:48:58 JST Andrew

   @suricrasia oh hey part of it’s the thing I’m working on at work

   The solution is an ADC and an FPGA. Sorry. You might be able to get this done with multiple filters and rectifiers but the accuracy probably won’t be any good

   • χan (x4nw@cathode.church)'s status on Monday, 27-Feb-2023 06:48:53 JST χan

     in reply to

     @cinebox @suricrasia i second this, no way i'd try to do it in analog other than for fun. the filters have to be way too tight (that entire frequency range is less than a decade). You can definitely process this in a microcontroller. Instead of FFT, you might consider the Goertzel algorithm here, which can very efficiently compute a set of specific DFT terms rather than producing a whole "plot"

   • Andrew (cinebox@hackers.town)'s status on Monday, 27-Feb-2023 06:48:54 JST Andrew

     in reply to

     @suricrasia actually at that low frequency you can probably do the FFT in a microcontroller

     Adrian Cochrane repeated this.