kill a watt?
purp at acm.org
Thu Mar 13 11:23:58 PST 2003
On Thu, 2003-03-13 at 10:22, Jim Lux wrote:
> Another inexpensive approach is to transformer couple the current and
> voltage on the line into the L&R ports on a sound card, grab a tenth of a
> second of data, and do all the power quality calculations you want. If
> you've got three phase power, you need 6 or 8 channels, which makes it a
> bit trickier.. but you'll be able to see if you've got circulating harmonic
> currents, etc. Anyone ever synchronized multiple sound cards across a cluster?
> The current transformers are $20, the voltage transformer is $10 (brand
> new, Qty 1 prices.. surplus can do MUCH better)
I love this list. =]
Jim Meyer, Geek at Large purp at acm.org
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