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Electronics Forum / Electronics / January 2007A/D power formula
Anyone out there know how to convert a bunch of analog voltage samples into a power reading? Do you just square the samples and average them? Thank you. > Anyone out there know how to convert a bunch of analog voltage samples > into a power reading? Do you just square the samples and average them? Need more info; what, exactly, are you sampling, and how often relative to the frequency or period of what is presumably a periodic voltage waveform (or, if that's not a good assumption, just what IS it)? Also - what load does this voltage appear across? Purely resistive? If not, what? I'm sure other questions could come up, but those will probably do for now... Bob M. > Anyone out there know how to convert a bunch of analog voltage samples > into a power reading? Do you just square the samples and average them? > > Thank you. Calculate the RMS value normally. Has example.. http://en.wikipedia.org/wiki/Root_mean_square |
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