1. This is the few selected sketches of dust so far.
There are still rooms for improvement. Comments are welcome.

The size and weight is very critical factor to this project. So we are trying to make it as small as possible.

2. For the coding, I drew state diagram to make things clear and easy.

3. Circuit
Michael has done great job making a circuit and testing it.
http://itp.nyu.edu/~mjc497/weblog/2007/04/dust_prototype_circuit.html
Also he is working on circuit design to make the whole piece small enough to attach on the body without any difficulties.