The Brown gas generator uses electrolysis to split water (H2O) into it´s base molecules, 2 hydrogen and 1 oxygen molecule.
This is why it is often referred to as an HHO gas generator.
Step 1: Stuff you'll need
Dc 5v power supply (You can also use batteries)
Two plated nails
Two rubber washers
Stripped copper wires
Step 6: Adding the led light
Now add a copper wire to the negitive lead.
Step 7: Adding the led to the build
Put the negitive lead into water. Now attach the postive lead to the nail.
Then add the second washer on top.