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 Post subject: Serial/USB power meter?
PostPosted: Wed Nov 26, 2008 9:00 am 
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Joined: Sun Jan 04, 2004 11:35 am
Posts: 534
Location: Chicago, Ill., USA
Does anyone know if there exists an AC power meter (like the Kill-A-Watt) with some kind of interface that can be read with a computer (e.g. serial port, usb)?

I've noticed that the readings on my Kill-A-Watt fluctuate. Obviously, adding various kinds of load will cause a fluctuation, but I've noticed this when there aren't any readily explainable causes.

I think it would be cool to be able to read and log power usage; the logs could then be compared to the system logs to hopefully track down power-hungry processes.

Also, for Linux users, there's an actual program, PowerTop, that can be used for the same end (reducing overall system power consumption). The means is different---it monitors CPU wakeups---but is still a useful tool (especially for preserving battery life on laptops).

my computers (updated December, 2007)

 Post subject:
PostPosted: Wed Nov 26, 2008 1:50 pm 

Joined: Thu Oct 21, 2004 4:49 pm
Posts: 336
Location: Upper left hand corner, USA
There was such a device, I remember reading a review of it a year or two back. It think it used USB. Unfortunately I don't remember where I read about it. I thought it might have been on this forum, but a quick look back at old posts hasn't turned up anything obvious. Come to think of it, it may have been only to analyze the power used by the computer itself.

Not the one I was thinking of, but the WATTS UP Power Analyzer - PRO version seems to have a serial interface.

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