The computer power adapter is plugged into the computer. What is a cylindrical object that goes down a little bit? What's in it? What's the use?
Magnetic ring, accurately called magnetic absorption ring, can absorb high frequency interference (clutter) very well. It is an anti-interference component commonly used in electronic circuits.
That is the power charge status display, when the battery is not satisfied, plug in the power adapter, into the charging state, full of electricity, the battery cylinder disappeared.
It is electromagnetic shielding, interference prevention, good line with, and in addition to mobile phone charger, USB data line, display data line and so on.
Because the signal line, the general power line has no shielding layer, then the signal line becomes the antenna good, receiving the high frequency signal clutter in the surrounding environment, and these signals superimposed on the signal transmission of the original, and even change the original signal transmission. Then, under the action of magnetic ring, the normal and useful signal can be well passed, and it can also suppress the passing of the high frequency interference signal and improve the quality of the input and output, but the cost is very low.
