Passive Tangible Prototype

This is a passive tangible prototype that I need to use for my Master's Thesis.

All parts need to be cut with a lasercutter and glued together.
I suggest to use around 5 mm for *bottom*/*rings* and 1 - 2 mm for *top_fill*.

The empty ring can be filled with some heavy material to increase weight (e.g. lead grist).
I milled a small groove from marker openings to the middle of the circle to make space for a cable.
The conductive material is then placed on the other side of the *bottom* part and connected to the cable.
All cables are connected on the inside of the Tangible.

[More details on "Tangibles"](http://hci.rwth-aachen.de/pucs)