"Mathew Newton" wrote in message
ups.com...
Keith D wrote:
I would like to have a data logger that can track the KWs being
used in my
home. I need to know load times/days etc. I have seen a number of
items that
do this by attaching to the power cable from the consumer unit and
then
sending this data using RF to a display unit.
(http://www.electrisave.co.uk/) but this does not have a PC
interface so I
cannot use it to log data over a long period of time.
Question: How does this device collect/measure the total
electricity used?

Here's a potential solution costing just a couple of quid...

http://offog.org/code/electricity.html

Mathew


But the problem with both that gas interface and opto electricity
interface is that they invite too many questions from the meter
readers - I'm sure that you'll be reported for possible fiddling
attempts with bits stuck all over the meter. That's why I opted for a
separate meter that I modified in series with the boards meter.

AWEM