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When you need to make a call, the mobile phone is dead. This is the most hated thing. In order to solve this problem, many scientists have thought about or tried to change the method of hand-held cell phones to convert kinetic energy into electrical energy. With the progress of science and the continuous efforts of scientists, the possibility of hand-crank charging is increasing.
According to foreign media reports, Shashank Priya, a scientific researcher at Virginia Tech University, and his colleagues are designing an emergency on-board charger that can draw energy from finger pressure on the keyboard, draw energy from the user's voice, or use traditional The manual mode can also be charged.
In order to develop this kind of emergency charger, scientists used a common piezoelectric material, zinc oxide, as an experimental test to see how efficiently the material converts sound vibrations and pressure waves into electricity. Tests have found that 100 dB of sound waves cause material vibrations to produce approximately 50 millivolts of power.
Researchers said that they plan to place this zinc oxide material under the keyboard or other keys, convert mechanical vibrations into energy and store them for future use. Of course, this method does not generate a lot of electricity. It is not enough for people to use phone porridge, but it is enough to make an emergency call.
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