How to Make Power From Citrus

Close the 18-gauge hole of a pair of wire strippers 3 inches from the end of a piece of 18-gauge wire, holding the wire strippers at a right angle to the wiring. Wire strippers have holes in them marked with wire sizes, or gauges. Rotate the wire strippers up and down while holding them closed around the wire to cut the insulation and pull the wire strippers toward the end of the wiring to remove the insulation.

Cut your 3-inch piece of bare copper wiring from the rest of the unstripped copper wiring using wire clippers.

Roll a lemon on a table under the heel of your hand to soften the lemon. This will break the tissues and release juices inside the lemon. Don't break the skin of the lemon.

Insert approximately 1 inch of your stripped copper wire into the top of the lemon as the lemon is resting on the table.

Insert a galvanized, or zinc-plated, roofing nail or wood screw into the top of the lemon as close as you can to the inserted copper wire without allowing the nail or screw to touch the wire. You will find galvanized screws at any hardware or home supply store.

Turn the dial on a multimeter until the pointer of the dial is within the "DCV" section on the face of the multimeter and is pointing to "2." Your multimeter might have a higher number such as "5." Use this number.

Check that the red probe of your multimeter is plugged into the "VmA" port and the black probe is plugged into the "COM" port. Turn on the multimeter if it is a multimeter with a digital display.

Touch the red probe of your multimeter to the end of the copper wiring and the tip of the black probe to the end of the galvanized nail or screw and read the electrical power your citrus fruit is producing. A lemon will produce approximately .70 volts of electricity.