I included a baseline (no loads), as well as waveforms for my laptop, the incandescent lightbulb, a CFL, and combinations of my laptop plus the bulbs.
Viewing and panning were fine; but since I was on a laptop with a trackpad, scroll-wheel movement was not an option. After reading your reply, I connected a USB mouse with a scroll wheel, and I was able to move the wheel and adjust the zoom (quite fluidly, actually).
The original schematic was great. Clear and elegant. I was able to discern the high/low sides without a problem. I used a 5V powersupply as well as the 5V from the Arduino.
The xBees I have are on Adafruit breakout boards, which I have been using with a Arduino Duemilanove and a Boarduino thus far. I'll begin by using the microcontrollers, but I would eventually like to leverage the built-in AIO sampling pins on the xBee such that I can embed the radio and sensors into a power outlet without the need for a microcontroller. The xBee would be pre-configured with AT commands to wake up every X seconds and send a sample to the xBee PAN co-ordinator. The coordinator server would then collect/aggregate the data. I think I'll have to remove an IC from one of the adafruit breakout boards in order to use the xBee AIO pins (same way that ladyada implemented xBee radio for the Tweet-a-watt).
I have some vacation time coming later in the month, perhaps thats when I'll work on that...(plus I planned to tinker with both a hall effect sensor IC and a hall-effect current transducer that came in the parts order that contained the optoisolators and current-sense resistor. Your addition of the non-invasive CT method could not have been better timed!)
Re-Reply: ...Software too - mostly...
Trystan,
I uploaded a handful of sample waveforms to flickr:
http://www.flickr.com/photos/41200830@N02/sets/72157621968166756/
I included a baseline (no loads), as well as waveforms for my laptop, the incandescent lightbulb, a CFL, and combinations of my laptop plus the bulbs.
Viewing and panning were fine; but since I was on a laptop with a trackpad, scroll-wheel movement was not an option. After reading your reply, I connected a USB mouse with a scroll wheel, and I was able to move the wheel and adjust the zoom (quite fluidly, actually).
The original schematic was great. Clear and elegant. I was able to discern the high/low sides without a problem. I used a 5V powersupply as well as the 5V from the Arduino.
The xBees I have are on Adafruit breakout boards, which I have been using with a Arduino Duemilanove and a Boarduino thus far. I'll begin by using the microcontrollers, but I would eventually like to leverage the built-in AIO sampling pins on the xBee such that I can embed the radio and sensors into a power outlet without the need for a microcontroller. The xBee would be pre-configured with AT commands to wake up every X seconds and send a sample to the xBee PAN co-ordinator. The coordinator server would then collect/aggregate the data. I think I'll have to remove an IC from one of the adafruit breakout boards in order to use the xBee AIO pins (same way that ladyada implemented xBee radio for the Tweet-a-watt).
I have some vacation time coming later in the month, perhaps thats when I'll work on that...(plus I planned to tinker with both a hall effect sensor IC and a hall-effect current transducer that came in the parts order that contained the optoisolators and current-sense resistor. Your addition of the non-invasive CT method could not have been better timed!)
Michael