Since my notebook has only 2 USB interfaces, I bought a 1 – 4 hub, but when you plug it in, I find that sometimes only one of the interfaces can be used, the other is not available, and it is estimated that it may be a reason for insufficient power supply. What should I do? Is it possible to plug in one of the hubs with the USB charger to act as an external power supply? Or are there any other ways to do it?

Insufficient power supply for USB hub can be used

1, the multi USB interface is powered at the same time, using one (or several) USB A TYPE to connect the A TYPE line from another USB interface to the hub. Note the USB A TYPE here only supplies power to the A TYPE line, so the white in the wire must be made. The green two-color line (that is, the data line) cut;

2, external power supply: there are 2 ways of the external power supply. First, use the USB cell phone charger directly through the USB A TYPE to the A TYPE line to the hub’s arbitrary SUB interface. The USB A TYPE here can do no modification to the A TYPE line. Two, take one of the connection lines, keep the clipped end cut to the other end, cut off the outer skin, separated off, so that the inner core line is long enough, Then the white, green and ground wire are cut off, only the red and black lines are retained, and then the outer skin of the red and black lines is stripped off. Finally, the two lines have corresponded to the line black line on the power supply in the chassis.

The standard voltage of the charger of the mobile phone is not necessarily 5V. If the standard and stable 5V voltage is used to power the USB hub, it can be done.

The hub is inserted into a device, and the other socket cannot be used. It is the reason for the power supply and needs further confirmation. A USB port power supply capacity of 500mA, the general mouse power supply current is about 100mA, the U disk power supply current is smaller, so the USB device, so the current is not a problem, if such a device cannot be inserted two, is the hub itself problem, and power independent.

The common USB devices that require large current are just mobile hard disks, and the working current of the general mobile hard disk is larger than that of 500mA. Obviously, the mobile hard disk can not share USB hub without auxiliary power with any other USB device.

The sound box and the notebook radiator are the pure power supply, not related to the signal, if this can make the mouse do not move, it is certainly a shortage of power supply. It is possible to connect auxiliary power from the USB interface of USB HUB. Pay attention to the correct and negative polarity of the supply voltage.

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