Really understand usb hub?Do you know these usb hub common sense
“Although usb hubs are common, everyone does not necessarily know how to use usb hubs. In order to enhance everyone’s understanding of usb hubs, the editor specially brings this article. Through this article, you will have a good understanding of usb hubs and the use of usb hubs.
Although usb hubs are common, everyone does not necessarily know how to use usb hubs. In order to enhance everyone’s understanding of usb hubs, the editor specially brings this article. Through this article, you will have a good understanding of usb hubs and the use of usb hubs.
With such a small structure of the hub, in theory, you can’t leave the operating platform of the computer, otherwise how to operate it? Unless your mobile phone is computerized and can Display other mobile phone drive letters, it can be used as a computer.
1. If the first section of my hub is a mobile power supply, the hub charges several mobile phones at the same time, and the output of 1A will be shunted and reduced, or shunted in parallel, —— shunted in parallel
2. If it is connected to 220V voltage-see the output of the power adapter
The USB hub is also called the USB Hub, which is used to expand the computer’s USB interface. Computer motherboards often provide multiple USB interfaces to the outside world, and these interfaces are often expanded through the USB hub chip on the motherboard. The devices we usually use that can connect to multiple USB ports can be used as USB hubs.
In the computer’s device manager, you can find the Generic USB Hub in the universal serial bus controller. As shown below:
Most computer hardware peripherals use the usb interface. When the built-in usb port of the computer is not enough, an external usb hub is required. The modern mainstream usb version is 3.0, which is backward compatible and can be hot-swappable. The USB hub has brought us convenience and increased the flexibility of the computer. But, do you know the correct way to use the USB hub? What should I pay attention to?
First, let’s see if our computer has been connected to many devices. Mouse, printer, charger.
We got a USB hub is it plugged in.
This is wrong and dangerous.
You might say, is this alarmist. There seems to be no problem with this link, and all devices can operate normally. However, after running for an hour, I accidentally checked the mobile phone and found that the wireless signal is gone, which is what we call WIFI. What’s the matter? I touched the hub, and it was very hot near the jack that connects to the WIFI. Makes the WIFI disconnected.
After careful analysis of the reason, it turns out that charging the mobile phone requires a relatively large current. However, after all, it is pass-through, but WIFI is working, so heat will be generated. Don’t care about the heat. After a long time, a fire may occur. Therefore, when we use the hub, we should pay attention to touch it frequently and observe the temperature change. If there is any abnormality, just cut off the connection.
If the USB3.0 Hub does not have an external power supply, the power supply burden may be heavier if the mobile hard disk and the USB Ethernet card are connected at the same time.
As far as I know, the USB network card is very power-consuming (USB2.0 is about 500mA current demand), and the power consumption is basically the same as that of a mobile hard disk. If your mobile hard disk does not have an external power supply, then the Hub may have insufficient power supply. . If the mobile hard disk has an external power supply, then only one USB network card may be no problem.
As for U disk and mouse keyboard, these power consumption are relatively low, and the current demand is generally around 50-100mA.
In addition, it is worth noting that the USB Hub itself consumes power.
High-end USB Hubs are mainly made by Belkin, and they are more expensive. I remember that they are around 100~200. Some may cost 300, but the quality is very good. Don’t buy the ones below 50 yuan, the ones that won’t last too long. .
As for the bandwidth, this depends on your storage medium and the speed of the network card. If the network card is a 100M network card, it will not affect the speed of other devices, because the speed of USB3.0 is as high as 5Gbps, which is 50 times that of 100M Ethernet. Generally, even if the mobile hard disk is an SSD, it will not take up the bandwidth of USB3.0. Of course, if you use a better one, it is possible.
So if you are using a Gigabit USB 3.0 Ethernet card and a high-end SSD mobile hard drive, the bandwidth may affect each other, otherwise the impact will be small.
Emphasize that you must buy a USB3.0 Hub, if you buy 2.0, it will be wasted.