The NoPila is the result of redesigning a bicycle lamp to reduce its environmental impact. I found that the greatest impact comes from the disposable batteries that are used in such products, so I created a generator that could power most bike systems using only the energy from vertical forces upon the seat.
First step was to look at where the impact was
After redesigning the fastener, the system shows considerable improvements
Designed for ease of assembly, disassembly & repair
this product replaces conventional fasteners
The NoPila was a class assignment for the subject Sustainability and Design. It was designed in Solid Edge, images are processed using Photoshop, and Corel Draw.
You can download additional notes here and click on the images to enlarge.
Welcome to my personal web page. Feel free to browse and comment. 
Sounds nice!
I still use SON (www.nabendynamo.de) (Probably much more expensive!)
Some English information about the SON can be found at:
http://www.peterwhitecycles.com/schmidt.asp
Distributor in the US shows SON range of products.
http://www.myra-simon.com/bike/dynotest.html
An older dynamo test article from the CTC magazine.
http://www.vintagebicyclepress.com/VBQgenerator.pdf
A comparison of current hub dynamos.
http://www.audax.uk.net/lights/dyno.htm
A survey of all aspects of dynamo use for long distance touring.