creating your own electroliser really isnt that complicated you just need to follow my directions explicitly, or use your head and find a sutable substitute, trust me I spent three years doing this so I know.

The ideal electroliser would be this one,

Note how there are more h2 bubles than o bubbles, o = oxygen h2 = two molicules of hydrogen, hence water, H2O. anyway there are more hydrogen molicules than oxygen because there are twice as many hydrogen molicules. you will also note that the water level on the middle tube is higher than the level on the sides, this is so that the water preasure will build up and naturally push the gasses down whatever tubes you have attached. The plates that you see at the bottom will have to be stainless steel, platinum, or some other corrosion impervious material, only do this if you are going to use tap water, I reccomend this since distilled water is expensive (you have to buy it) and you should use distilled water if you are using some other metal, GO WITH THE STAINLESS STEEL trust me on this, like I said I have worked three years at this. The wires leading to the plates should be insulated, or else they will corrode and fall of, a sad thing im sure.

Now please take a moment to admire the SHEAR GENIOSITY of it ISNT IT GREAT! I mean cool looking, harnessing all the natural forces like gravity and physics to meet the required goal?!

Yes I did say geniosity didn't I?

Back to the subject!..........To create one of these you need some basic parts

LOTS of CLEAR plastic tubing, about 4 feet get that at home depot.

2 twist on/off valves find those at a science surplus store, somewhere like that. or pvc, they also work.

hose clamps, about 10 of them around the same size as your tubing.

2 steel plates, about 1cm by 1cm and thin-, talked about earlier in text.

wire, about a foot of insulated wire, a smaller gauge than household wire.

a board, or something like a wall to mount it to.

one T section, (brass tube)

2 u-bends, that you can attach to the T section. (brass tube)

a nine volt.

LOTS of salt (to help improve the conductivity of the water)

here is some pics of MY electroliser, I dont have the little bubble on top, like in the picture above, and this makes it hard to put in the contact plates, (wires) but its all good. I also only have ONE valve, this is because I dont want to collect the oxygen, just the hydrogen. I use a cork to stop the water from going out of the oxygen tube

topleft, the first picture, topright, after I put tubes on, bottomleft, i mounted them on a board bottomright, I was watertesting the device, a few leaks, but I took care of them with a hot glue gun.

to asemble it, connect everything like shown in the pictures, the middle part of the T section goes to 2 ft of tubing (there has to be at least 2 ft left after this cut) secure it with a hose clamp. the two ends are connected to the u-bends, then do same as above to connect the 1 ft peices to both of the u-bends, drill holes in the plastic tubing near the bottom and insert the wires, thread the wires through the tube and THEN connect it to the metal plate, repeat for other side. Pull the wire back and viola! its done, add water and salt and hook up the batery after you put on the valve.