Before I dive in on the build, I want to take a few minutes to explain the basic science of how a hydrogen fuel cell works for those of you who don't know.

The Process:

1) Hydrogen gas flows into the anode side of the of the fuel cell

2) The hydrogen gas is exposed to an electrolytic material that allows for hydrogen protons to pass through. However, the free electrons are forced pass over it's surface through the anode where the electrons can be used as electricity.

3) Once the hydrogen reaches the cathode side of the electrolyte the hydrogen is then combined with oxygen atoms to create waste water.

So long short, if i end up with water and electricity, then I have a working fuel cell.

For more details checkout:

http://americanhistory.si.edu/fuelcells/basics.htm

http://en.wikipedia.org/wiki/Fuel_cell

http://auto.howstuffworks.com/fuel-efficiency/alternative-fuels/fuel-cell.htm