Looking to monitor the temperature and humidity in your house? Instructables user wpnsmith shows off how to build a monitoring system with a Raspberry Pi.
All you'll need for this is a Raspberry Pi, a case, SD card, and a sensor. When you're done, you'll be able to monitor the humidity and temperature from a web server hosted on the Pi. The whole thing is actually pretty easy to set up. Head over to Instructables for the full guide.
Raspberry Pi Temperature & Humidity Network Monitor [Instructables]