Many of you might have wondered what these little cylinders are used for in the charging cables of the devices. As it is very common to find them in chargers for mobile phones and laptops, in mice, keyboards and, in general, in many of the computer systems of our home and office. But what is the purpose of these cylinders?
What This Little Cylindrical Thing At The End Of Your Charger Is For?
Probably you have ever wondered what these little cylinders are used for in the charging cables of the devices. As it is very common to find them in chargers for mobile phones and laptops, in mice, keyboards and, in general, in many of the computer systems of our home and office. But what is the purpose of these cylinders?
They are basically known as ferrite beads, but they are also known as electromagnetic interference filters (EMI). The ferrite bead acts as a parasitic current filter and simply prevents loss of power in the cables. This, in other words, it simply makes our loaders much more efficient and our machines load faster.
Its main objective is to reduce radio frequency interference (EMI and RFI). As the cylinders maintain the energy that circulates through the cables and acts as a barrier to voltage peaks. As they are more effective the closer they are to the source of electromagnetism, so the most common is to find the ferrite beads near the ends of the cables.
What is Ferrite bead?
As we told earlier little about it, now let know about in brief, basically, a ferrite bead is a passive electrical component, made to block high-frequency noises in electronic devices. A ferrite is a ceramic material consisting of iron oxide having magnetic properties.
They also act as an inductor that blocks high-frequency sounds in electronic circuits. The filter contains different ceramic compounds, oxide derivatives and oxides of other transition metals as we hinted earlier.
If we cut the plastic that covers a ferrite bead, we will find another metal cylinder inside it. This piece of metal absorbs and releases any type of radiation while the current continues to flow inside. In this way, the cylinder prevents our cables from behaving like antennas.
Do you know those magnets that we found in speakers or other electronic components? That’s a ferrite. And if you wonder why they are always present on these devices, then don’t worry about that, as here in this post we will tell you everything about it.
As ferrite acts as a magnet, it is used to filter out electromagnetic radiation emitted by various devices. In the case of the bead in the cables of your notebook, which consists of hollow beads around the wire, it simply prevents the magnetic field, generated by the energy passing through the cable, from interfering with other devices around you.
Let me show you an example, suppose, when your phone rings and you are near a computer with a non-bead cable (many manufacturers do not install it on products to reduce costs), and your insulation is not good, you will hear a lot of interference or irritating noises.
Which cables have Ferrite bead?
In general, power cables of monitors, power supplies and notebooks as well as some USB cables may rely on the ferrite bead, but this is not the precept. As it totally depending on each use, as it is now preferable in all places, as for example, if we will use it in the cables for data and sound transmission then let me clarify that it can simply filter out important pieces of information or damage the sound experience.
Is it important to have a ferrite bead in the cables?
Basically, the users can simply install a ferrite bead in a cable by their own since they can be easily found in electronics stores. However, before doing so you need to define exactly what your particular use will be.
In general, you should avoid installing these beads in cables that do not have them originally, but instead of that, you can simply replace those that have broken and already have them.
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