An electrolyser is a piece of scientific equipment that splits polarised molecules into its ions. In this case it will split water into hydrogen and oxygen gas. A dry cell electrolyser is an electrolyser that is completely enclosed; the other type is a wet cell electrolyser which can be two metal plates in a bowl of water. The equipment is fairly simple but the theory behind it is a bit more complicated, if you’re not interested in the theory then skip to step 1.

Here’s the theory: the electrolyser uses the different ionic charge on the different atoms in the molecule to split it into its respective charged atoms or molecules, for example, water gets split into Hydrogen and Oxygen because in the water molecule the hydrogen is slightly positively charged and the oxygen is slightly negatively charged. These charges are only very slight, +1 electron volt (ev) for each hydrogen and -2 ev on each oxygen atom. Just for comparison 1 electron volt is 1.6×10−19 Coulombs (c) and 1 Coulomb is the charge transported by a steady current of one ampere in one second. The hydrogen is attracted to the negatively charged electrode or Cathode and the oxygen is attracted to the positively charged electrodes or Anodes. At the anodes the oxygen ions loose an electron and bond to form oxygen gas, at the cathodes the hydrogen ions get an electron from the cathode and then bond to form hydrogen gas. This transfer of electrons from and to the electrodes completes the circuit and allows current to flow. A catalyst can be used to make the process more efficient by reducing the energy needed to start the process; the catalyst that I use is sodiumhydroxide in a 1 to 40 mix with deionized water. The water doesn’t need to be deionized but it extends the lifetime of the unit as minerals and other stuff won’t build up on the electrodes.

Step 1: Parts and Tools

The PDF shows the parts of the electrolyser and how they're assembled, however I will go into this in more detail later.

There are several parts and a few tools that you will need.
10mm polycarbonate
8mm id 12mm od rubber tubing
3mm rubber gasket material
180cm M8 studding
18x M8 dome nuts
18x M8 nilock nuts
4x 1/4in BSP aluminium washers
2x 1/4in BSP male to male adapter
2x 1/4in BSP male to 1/8in BSP female adapter
2x 1/8in BSP to 8mm tube connector
2x 1/4in BSP 2 way ball valve
12AWG wire
17x M7 ring terminal
15x Flag crimps
Loctite pipe sealant or equivalent  

13mm spanners
Crimp tool
Wire cutters
Wire strippers
Jig saw
Permanent marker
Metal ruler
Sharp knife
<p>Tip: Use kitchen steel wool and/or activated carbon pellets as a flashback filter, I used a combination of both in a round electrolyzer (12mm tube with 5-6mm carbon rod in it, carbon rod is + and tube is -, so the tube won't dissolve, but the carbon rod gets thinner over time) and it made a small flame, enough to smelt aluminum foil.</p>
how much gas it can produce per minute <br>working on 12vdc 10to15 amps
<p>How much did it cost you to make this? Do you think I could buy all of this off of Amazon?</p>
very cool and clean look, BUT.. how well does it work? there are lot's of HHO's out there and everyone has their own take on them, I've made 3 different ones and everyone resulted in a BIG BOOM, LOL.. No one was hurt and I had a great time in the making. So my question, how much gas can it produce per min? <br> <br>Great design.
It filled a 2 litre bottle in a minute or so and I have filled lots of bottles with the gas and lit them and once I temporarily defend my self by igniting 5 at once.
<p>why not harvest the hydrogen using a compressor with a built-in tank (60L capacity). Imagine the amount of Hydrogen you can use! In fact you can even sell it!</p>
Nice, that's good flow, and ya for some reason? maybe because of the Oxy with the HH it makes a big BOOM, now matter how small the amount, I could see the flame running up the tube to the chamber, POW. Great fun.
godfish <br> <br>you can fix the BOOM if you have a bubbler in line. This fixes the blow back or in your case boom. It is just a separate container that has the hydrogen in a tube to the bottom of the container filled with water than another hose not submerged in the water that collects the gas and goes to what ever you have it hooked up too. so it doesnt go into the main generator
<p>This is a really cool project. I was wandering where the attached PDF is... You mention it a lot throughout the instructions but I can't seem to figure out where it is.</p>
<p>Instead of rubber gaskets, could I use rubber washers to avoid the plates from contacting then wrap the whole entire thing in some sort of rubber or fill the gaps with epoxy or hot glue?</p>
<p>I don't see any reason why this wouldn't work provided you got a good seal, you also want the individual cells between each plate to be as sealed as possible to increase efficiency, ie. this design is more energy efficient than the same plates in a bowl of water</p>
nice project!!
i would like to get a video on this process..........how about that?
May I ask where did you buy the plates? <br> <br>RaD
I got them made by R and D precision because my dad's company uses them. Here is there website http://www.randdprecision.co.uk/

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Bio: I can't spel, love survival stuff, knots, blowing stuff up, science, camping
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