From LowPowerLab, via a tip from Kevin Groce!
I assembled my Moteino circuit inside the KillAWatt. Everything fits very nicely and the LED blinks every ~2 seconds, and data finds its way to my RaspberryPi where EmonCMS records and graphs it nicely. At the last minute I found a leftover TMP36 analog temperature sensor that I had around, and thought – why not add it to the Moteino and report temperature along with power readings?
I feared the TMP36 sensor alone would draw too much power (even an extra constant 2mA is too much for my KAW!). But it turns out it’s a very low power sensor (just 0.05mA). Since Adafruit has a very nice demo and code for TMP36, I won’t replicate the details here, you can check them out at Adafruit’s learning system.
Now I’m getting temperature, voltage and current waveform readings from my KAW.
Each Friday is PiDay here at Adafruit, be sure to check out our posts, tutorials and new Raspberry Pi related products. Have you tried the new “Adafruit Raspberry Pi Educational Linux Distro” ? It’s our tweaked distribution for teaching electronics using the Raspberry Pi. But wait, there’s more! Try our new Raspberry Pi WebIDE! The easiest way to learn programming on a Raspberry Pi.
We now have Raspberry Pi Model B with 512MB RAM in stock and shipping now!