Re: [opensuse]  [OT] How much power does a PC really consume? -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1



The Sunday 2008-02-17 at 15:09 -0800, Randall R Schulz wrote:

> So the RMS voltage and the resistance allow you to compute the average
> power over a full cycle. (Note that power is voltage squared divided by
> resistance and that this is the real reason that RMS is the way to
> compute the average power dissipation in a resistive circuit.)

For power you have to consider the power factor, the cosine of the phase 
angle - which for a resistor is 1, of course.

> But if you have an instantaneous power function and apply the RMS
> calculation to that, you'll get a value with no physical meaning.

which is why I said the first day that I don't know how good are those 
measurement gadgets when applied to a swith mode power supply.


Here:

   http://www.analog.com/en/

Search for the ADE7756AN  (Active Energy Metering IC with Serial Interface)


- -- 
Cheers,
        Carlos E. R.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.4-svn0 (GNU/Linux)

iD8DBQFHuq8xtTMYHG2NR9URAuZlAJ457OZmA4bkswGHncdMwScEumhQtQCfVL+a
25HT1xGwWm0LdQxdGUfoMJQ=
=j8xD
-----END PGP SIGNATURE-----


