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Science Forum Index » Electronics - Misc Forum » A/D power formula
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| Guest |
 Posted: Mon Jan 22, 2007 9:22 pm |
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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. |
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| Bob Myers |
| Posted: Tue Jan 23, 2007 2:38 am |
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Guest
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<bob@coolgroups.com> wrote in message
news:1169515361.246847.234510@m58g2000cwm.googlegroups.com...
Quote: 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. |
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| CWatters |
| Posted: Sat Jan 27, 2007 5:12 pm |
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<bob@coolgroups.com> wrote in message
news:1169515361.246847.234510@m58g2000cwm.googlegroups.com...
Quote: 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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