Re: Household electrical current to Excel ???

[Dan Bloomquist <public21@xxxxxxxxxxx>]

Linny wrote:

> On Mon, 29 Aug 2005 16:24:00 +0100, Declan McEvoy wrote:
>
> Someone from on Misterhouse list, named Alan Womack, did built
> a cheap device that seem to work fine. This was done 2-3 years ago.
> look for "power meter" in the archive.
>
> He did mention the following site.
> http://www.seanadams.com/pge/
>
> And some post have his personal pictures

Nice hack.

But if time is money and you want to capture the signature of motor
start-ups...

Take a couple of cheap current transformers and a door bell transformer
for sensors. (The first one I did was twenty five years ago using a hall
device and multiplying in a MC1495)

These days just take your three outputs and run them to something like
the LabJack.
http://www.labjack.com/labjack_u12.html

Now you can even catch the power factor of reactive loads. At 20 samples
per cycle you won't do to bad. If you are into it, you can hang a
multiport AD converter on the parallel port.

The question, 'does someone have a package ready to go?'. I'm sure there
is. But it is likely to be industrial pricing requiring labview.

Best, Dan.

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