USB cable

The USB cable supports devices according to different interfaces and data cables: mouse, keyboard, printer, scanner, camera, flash disk, MP3 player, mobile phone, digital camera, mobile hard disk, external optical floppy drive, USB network card, ADSL Modem, Cable Modem And other electronic products. Ordinary USB data cables do not have a central control chip, and they must be plugged into a mobile computer to recognize the cable, which is cheap. The USB data cable has an IC with a central control chip, and it will recognize the cable without plugging in a mobile phone or computer, so the price is more expensive than that without an IC. The working principle of the data line with chip is to convert the USB interface into a serial port and display it on the computer.

The USB cable is now more and more widely used, convenient to carry, and transfer data fast and stable. It is widely used and can transfer data easily, quickly and stably, and supports all types of computers; the disadvantage is that the price of ICs is slightly higher, and some data lines do not support the flashing function. USB is the most widely used external bus standard in the PC field. It is used to regulate the connection and communication between computers and external devices. The USB interface supports plug-and-play and hot-swappable functions of the device. With the rapid development of computer hardware, the application of USB has increased the speed of data transmission between external devices. The biggest benefit of the increase in speed for users is that users can use more efficient external devices, such as USB 2.0 scanners and scans. A 4M picture only takes about 0.1 seconds, which greatly improves work efficiency.

In theory, the USB charging cable only uses two wires for power supply (VBus) and ground (GND), and does not involve data transmission, so basically the USB charging cables are similar.

But in fact, it’s hard to say, because the cores of USB cables of different qualities are very different. A better line has more copper wires in the core, but a lesser line has very few copper wires in the core. , Even I have seen only one or two roots. If the quality of the core is poor, it will definitely affect the charging, especially if the output current is more than 2A, the resistance of the poor quality line will be larger, and there is a risk of overheating and fire, and the poor line charging speed It will be slower.