I got the idea for this model after doing a couple static bridges and originally was thinking about doing a lift bridge:
Once I started working on it I decided that it was both too big and too complicated (from a perspective of doing the animation). I had already seen the Bascule type of bridge that I ended up modeling and had an idea of how to animate it ... so this project was born ... to model this bridge:
Here are the source files for the bridge and the lift mechanism as well as instructables covering assembly of the bridge, of the lift mechanism, and of the electronics.
This was a great project in that it combined some 3D Design and Printing that pushed my experience and the capabilities of my printers as well as combining the Arduino for animation.
Virtually everything that I design is "open source" under the "Creative Commons, Attribution, No Commercial Use" license and can be found here on Thingiverse! I am also interested in project ideas so please reach out if you have one!