These files were created with Eagle 5.1.0, you'll need Eagle 5.0 or later to open them up. There is a free, lite, version of Eagle available from [cadsoftusa.com](http://www.cadsoftusa.com/download-eagle/freeware).
This product is open source! These Eagle files are released under the Creative Commons Share-Alike Attribution license ([CC BY-SA 3.0](http://creativecommons.org/licenses/by-sa/3.0/us/)).
Please use, reuse, and modify these files as you see fit. Please maintain attribution and release anything derivative under the same license.