Today we are going to see what this cylinder is, what it is called and what functions it has for our devices.
EMI filter
This is its name, it comes from the acronym of electromagnetic disturbance (EelectroMmagnetic Iinterference), whose function is essentially to avoid them.
Its composition is based on ferritin nucleithese prevent outside interference and therefore to improve the quality of the cable, thus allowing a charger, for example, to lose as little energy as possible and to make the most of the energy which circulates there. In other words, they are much more efficient.
Its name tells us the main function, reduce radio interference. When they reach this cylinder, it takes on the task of transporting the energy it receives check for any voltage spikes.
Thus, they are always found near the end of the cable, since the closer they are, the more effective they will be because once past this plastic cylinder, the voltage reaching our device is no longer controlled.
It can also lead us to think about the quality of the product, since a simple cable that powers us, sometimes we can come to believe that as long as it powers the shaver or the laptop, it does not matter whether it is cheap or not. And obviously, at this point, you already don’t know that. You should always look at the certification and manufacture of the cable and see what this type of safety entails, if you want your equipment to last longer and not suffer from unexpected strain issues.
EMI is one of the most effective and cheapest passive elements, so if your cable doesn’t have one, consider buying another one, it must be very bad so they don’t even invest in it, apart from the Asians, because in Europe they are forced to carry it for safety.
These products are also widely used in sound as electrical interference can affect even a radio, distorting its sound and quality. In this article, we explain why it is so important and you should use it in your headphones. I’m sure you’ve used ones without EMI before and when you brought them closer to the mobile you noticed some kind of interference, now you know what it is. All these interferences that you notice come from the fact that absolutely all cables that conduct electricity cause them more or less.
So now you know something you didn’t know and your friends or family surely didn’t know either. If you have an old cable at home that doesn’t work (I’m sure), I invite you to open it, it’s quite easy since they are covered in plastic, so you can see for yourself how it’s done.
