This Instructable is not only my first... it is also for the Science Fair contest.
Step 1: The Parts
- A wall transformer ($4.77), which is available here on Amazon.com:
- Water ($0.00), which is usually freely available
- A bowl ($0.00 - $0.06), which can be replaced with anything that can hold water. A cheap bowl is available here on Amazon.com: http://www.amazon.com/Pfaltzgraff-Flower-Garden-Melamine-cereal/dp/B0001GUCCE/ref=pd_bbs_4/103-7672438-6241403?ie=UTF8&s=home-garden&qid=1188382928&sr=8-4
- A small water bottle ($0.00 - salvaged) or test tube ($24.99), which is available here on Amazon:
- Salt... optional
Step 2: What to do
Next, cut the plug off of the wall transformer. Next, install a fuse to prevent the transformer from breaking in the event of a short. A good fuse is available here on amazon.com. In addition, you can screw on a switch like this. Separate and strip the two wires (you can get a wire stripper here: http://www.amazon.com/Shooter-Tubes-Set-With-Stand/dp/B000COCCX2/ref=pd_bbs_1/103-7672438-6241403?ie=UTF8&s=home-garden&qid=1188383061&sr=8-1 ). Plug the transformer in and submerge both leads in water. To enhance production, you can use pencil graphite by sharpening both ends of a pencil.
One should be rapidly generating bubbles, which are full of hydrogen. Once you know this works, go ahead and tape the lead that does not generate bubbles to the side of the container (still under water). Next, take a test tube or bottle filled with water and while keeping the bottle/tube filled, submerge the open end under water. This prevents air from entering. Thread the wire that generates bubbles into the tube.