| Dumping alt.engineering.electrical I found firstname.lastname@example.org was
|> I'm looking for any marketed (and UL listed, safe) product that allows
|> monitoring of the AC power waveforms via a computer sound card. It would
|> be good to have such a device with bandwidth up to the sound card sampling
|> Nyquist frequency. It should be stable, so that once calibrated, it can
|> give a reasonably accurate voltage reading for some while. But the main
|> use I want this for is to monitor for waveform noise and voltage changes.
|> It would be nice if it has a reasonably high dynamic range, like up to
|> 600VAC/848VPP (and safe to plug into 240V).
|> I have found a USB based device. Apparently it sends voltage levels to the
|> computer, not the AC waveform. I want the waveform AND I want to do it on
|> Linux, so devices like this just won't work.
|> Anyone heard of such a thing?
| Could this device solve it?
| http://www.szsunyuan.com/sy/New_More.asp?Newsid "2
I don't think so. The sound card can fulfill the role of this device. What
is needed is a passive device to safely reduce the voltage from the AC supply
to the level appropriate for the sound card. It needs to be safe with respect
to surges and grounding.
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