I bought a humanoid USB hubView hub information in device manager:The hub comes with power, each port 500MASome questions are not clear:What does the hub power supply mean? Is it powered by an USB port or is it equipped with batteries inside?Does each port 500MA refer to each USB extension for maximum 500MA power supply?A USB port on the chassis can only provide 500MA current. Is it not meaningful for each port of the concentrator to supply power to the 500MA? Does that mean that the total power supply of the device plugged into the USB hub must not exceed 500MA?Can I increase the power supply of the USB hub if I use a long USB cable to connect the 2 USB ports on the chassis to the USB hub?
The current and voltage are mainly from the computer interface, and the two interfaces do not improve the power supply
In the USB interface regulation, the interface has four lines, and the middle two is the signal line, the two sides are the power line and the ground wire, the power line voltage is 5V, and the maximum can provide 500mA current,
Because the motherboard comes with USB port power supply by the motherboard, may have been inadequate.If you divide it into 4, it will not be enough if you use it at the same time.For USB equipment with power supply, independent power supply is needed.Without power supply, the power is directly connected with the main board, and the total current of several ports is only 500mA, which may not be enough
