One potato for 40 LED bulbs in one room
For potatoes, different people may have their own favorite cooking methods, but Haim Rabinowitch thinks farther. In the past few years, Rabinowitz and his colleagues have been pushing the idea of ​​“potato power†in an attempt to make people abandon energy from the grid. They claim that with simple and inexpensive metal sheets, wires and LED bulbs, they can provide lighting for remote towns and villages around the world.
Potato power generation plan
They found a simple, yet clever way to make potatoes power. Rabinowitz from the Hebrew University of Jerusalem said: "A potato is enough to provide 40 days of electricity for a room's LED bulbs." This statement may seem exaggerated, but in fact has a reasonable scientific basis. However, Rabinowitz and his team have found that the real application of potato power generation to real life is far more complicated than it seems at first sight.
While Rabinowitz and his team found that potatoes can produce extraordinary electrical energy, the physics course at high school is still teaching the mechanics of battery work. To make an organic material into a battery, you only need two pieces of metal, one as the anode, the electrode with low potential, such as zinc, and the other as the cathode, which is a positively charged electrode, such as metallic copper. The acid inside the potato reacts chemically with zinc and the electrons are released when electrons flow from one end to the other.
In 1780, Luigi Galvani discovered the mechanism by attaching two pieces of metal to the frog's legs, causing the frog's muscles to twitch. This "animal electricity" can also be replicated outside the animal, and you can put a lot of other substances between the two metal poles to get the same effect. Alexander Volta, who was at the same time as Luigi Galvani, used saline paper. Others have produced "soil batteries", using two pieces of metal and a pile of soil, perhaps with a bucket of water.
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