Connect two wires, each on either of the negative and positive terminals of the electric generator. Bore two holes through a container’s airtight lid for the wires to pass through and seal off the holes using plasticine to ensure the cylinder is still airtight.
Remove the lid from the cylinder to make it easy for you to connect the two electrolyte plates at the ends of the two wires from the electrical generator. Use plates as opposed to rods to increase the surface area for electrolysis. This increases the amount and rate of hydrogen generated in the process.
Bore a third hole through the lid of the container and insert the plastic tubing through it such that any gases produced in the airtight container escapes through it. Seal the spaces that might be around the tubing at the point it enters through the lid with plasticine to ensure the container remains airtight.
Invert a cylinder to place it in an upside-down position and elevate it such that it is higher than the first container. Connect the tubing to this cylinder as well through its lid such that the gas collected via the tubing enters the cylinder in an upwards manner. Hydrogen is lighter than air. Therefore, inverting the cylinder ensures it does not escape when being collected.
Pour tap water into the first container and immerse the electrolytes into it. Make sure the water does not reach the rim but leave a small space between its surface and the lid. Also ensure that the plastic tubing is not submerged. Seal the container shut and turn on the electric generator for the process of producing hydrogen to begin. You will notice bubbles forming on the surface of the negative electrolyte of the apparatus. The gas being formed is Hydrogen and will escape from the container through the plastic tubing to the inverted cylinder for collection.