Monitoring electricity usage : Part 2
Recently I found other ways (see my previous post) to monitor my house’s electricity usage:
They use current transformer clamps instead of reading the power meter’s output. I prefer this design mainly because you get instant reading (ok the power meter gives a relatively fast reading but I want < second reading) and it allows you to compare with the power meter reading (my power meter is probably > 30 years old, still accurate??).
Then I found this project:
http://www.picobay.com/projects/2009/01/real-time-web-based-power-charting.html
This is mostly what I’m planning to build. I was looking for a cheap and well documented current transformer clamp model. So I ordered 2 of these clamps.
More to follow…
