Website: thingiverse
Author: tcrong
Price: Free Download
File format: .Stl 3d printable
Description:
Phone case designs with working gears, that demonstrate simple mechanical principles. Designed for Iphone 4/4s/5/5s/, more files for other phones will be available soon, like Nexus, and Samsung phones.video of working case:https://www.youtube.com/watch?v=LUIjyUjPqzAmy blog: http://mrguo.net/blog/