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Inside Nest’s learning thermostat

I got my Nest learning thermostat in the mail on Wednesday (a couple of weeks early and in time for the holidays), but thankfully when I woke up on Thursday morning, the folks at SparkFun did a complete tear-down of the Nest, so I don’t have to break mine up. Oh happy day.

We’ll bring you some videos of the Nest thermostat shortly, but in the meantime, make sure to check out SparkFun’s tear down. Here are some of the details they found:

  • It has an internal lithium polymer battery, around 567mAh. SparkFun guesses “the unit may need more power than the HVAC wiring can provide when Wifi is broadcasting and the display is on. The LiPo acts as a very large capacitor.”
  • The IC reads XLitos, probably used to detect motion in a room.
  • Two antennas, one for Zigbee and one for Wi-Fi.
  • Some Texas Instruments (s txn) IC inside.
  • A mini-USB connector.
  • Magneto sensors, likely for reading the notches on the dial via magnetic field.
  • Designed in the U.S.; built in China.
  • It has “an astronomical amount of silicon for a thermostat!”
  • If you plug the Nest into the mini-USB, you can use it as a 38MB jumpdrive.

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