It is well known from physics that any action is accompanied by the release of energy. A group of German scientists have developed a mechanism that converts mechanical energy when walking into electrical energy.
The device is located directly in the shoe and consists of two parts. The first half is responsible for generating energy at the moment the sole touches the surface, and the second is responsible for generating energy when the foot is lifted.
The principle of operation of both devices is based on the collection of energy using coils and magnets. Moving magnets move relative to the stationary coils and at this moment energy is generated, which is then converted into electricity.
So far, the device generates very little electricity - only about 3.8 mW, which is enough to operate only a small sensor. It takes 600 times more to charge a smartphone, but according to one of the developers, Clevis Yuli, an undoubted success has been achieved. Compared to previous developments, the device has turned out to be more compact, and increasing its performance is only a matter of time.
The amount of energy generated by the device also depends on the size of the shoe. But the second part of the device was invented by German engineers with an eye to the future - to create laces that will be tied and untied themselves.