Tracking personal power usage since 2011.

Various A/V devices, including a big TV and two computers.

This shows a 19 millisecond sample from about a minute ago. Since US mains runs at 60Hz, 19 msec is just over one full cycle, which you can see here.

Microwave, toaster oven, etc.

This shows a 19 millisecond sample from about a minute ago. Since US mains runs at 60Hz, 19 msec is just over one full cycle, which you can see here.

Wattage (and cumulative watt-hours) used over the past day
Wattage (and cumulative watt-hours) used over the past week
Hardware
The data is collected using Kill-A-Watts, wirelessly networked together using XBee radios. Check out Adafruit's kits.

Software
This project was done in ruby, and the code is on github.

More Info
See my blog.

Author
Patrick Schless