Do you know what dynamo is and where we can use it?

Dynamo is basically an energy generator. It is a device capable of transforming mechanical energy into electrical energy through the electromagnetic induction process. It is named after the Greek word dynamis, which means strength.

This equipment basically consists of a magnet fixed on a moving axis, around which there is a coil (a long cable wound in turns and made of electrically conductive material, usually copper), without physical contact between the coil and the magnet.

Danish physicist Hans Orsted and English physicist Michel Faraday are the big names involved in the discovery of Dinamo. In 1820, Orsted occasionally noticed that the compass pointer was moving when it was near an electric current-traversed lead wire, and thus initiated an electromagnetic induction investigation.

Subsequently, the English physicist, motivated by Orsted’s experiments, became involved in the studies and carried out some experiments. Faraday discovered that when the stationary magnet oscillates near an electrical circuit, the electrical current traveling through the circuit is modified.

The phenomenon (magnetic induction) discovered by Faraday is also present in Lenz’s Law.

Which says that “the direction of the current is the opposite of the variation in the magnetic field that originated it.”

One of the first Dinamo models dates from 1836

Being a power generator developed by the French Hippolyte Pixii

When we talk about flashlights, the use of the dynamo in many models comes to mind.

In addition to traditional charging methods, you can also find flashlights that rely on dynamos to function. These lanterns are generally very inexpensive and can be found in various places, in various sizes and styles.

These kits have capacitors or small batteries that store a limited amount of energy, but can be recharged with lever movements that, by generating friction, create current and then recharge the device.

Despite guaranteeing a certain independence from batteries or electricity, dynamo lanterns emit very little light and cannot be “forgotten” in a drawer. If the capacitor / battery loses its charge, the flashlight will probably no longer work.

In summary, it’s an interesting kit for terms like backup and simplistic activities, but it’s not usually the first choice for survivors or adventurers.

This is the type of power source that will not disappoint regardless of where you are, however it is not as powerful as rechargeable batteries.

This model of flashlight is very cheap and can recharge your energy at any time.

To do so, simply turn the crank. This movement generates friction that creates currents of energy and recharges the flashlight.


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