Simple Wet* Cell - Battery
Bottom: 1 inch square of copper flashing.
Middle: 1 inch square of cloth, soaked with salt water.
Top: 1 inch square of galvanized steel flashing.
This constitutes one complete cell which I have found to produce almost exactly a forth of one volt on my meter. If you make a number of these cells, you can connect them in series by stacking them one upon the other until you have the desired output.
Make sure that you stack one complete cell upon another, such that the galvanized steel top of the base cell is in direct contact with the copper plate of the next cell up.
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Here is an illustration of a three volt pile. This would be the starting voltage for the common LED lights that are used as indicators on electronic equipment. The less noble metal (galvanized steel) is the negative terminal AKA anode, and the more noble metal (copper) is the positive terminal AKA cathode. This is important if you intend to demonstrate the power output with an LED, because the light emitting diode is just that...a diode, and allows the current to flow in one direction only. |