USB cables have different physical tips. It depends on which device it is connected to. There are connections to the device itself and to the host. And USB can be with a cable, and without it. This option is also possible: the cable is built into the device itself. The cable is required in order to form the interface between the device and the host.
But after a while, the developers of a computer interface like USB, still had a little speed in order to use external hard drives and other devices whose speed was much greater. Therefore, the creators of USB had to change the device so that it turned out a new model. Now the speed of the third type of USB has become ten times faster. Of course, this is reflected in the charge.
- 1 USB Overview
- 2 USB specification
- 3 Specifications of each model
- 4 USB cables and connectors
The USB cable consists of four conductors made of copper. These are two conductors designed for power, and the rest of the conductors in a twisted pair. This kit also includes a grounded braid.
Consider now a little host. It serves as a special controller, which is programmed and controlled. Its task: to ensure the operation of the interface. By the way, the controller most often can be found in the chip. A hub is required to connect the controller with other devices.
But in order to connect external devices to the hub, ports are used, at the end of which ports are located. Cables help USB devices connect to connectors. The power supply of the device may be different: from the bus or some external power source.
To start the launch, just a few minutes is enough and you can join in the work. At first signal to start work goes to the cable hubwhich reports further that the equipment is ready for operation.
But it is worth remembering one rule. Whenever you start pinning a device, first determine what the pinout on your cable is. Connector yusb help connect all external devices to your computer. This modern method of connection replaces all those methods that were previously. Such connector provides additional features: during the operation of computer equipment, any devices can be connected and immediately put into operation. It can also affect the work of charging.
There were the first preliminary versions of USB, which began to be released in November 1994. This went on for a year. AND after that, new USB models started coming outthat are used and still.
Today we can talk about the following models:
- USB 1.0. This model was released in January 1996.
- USB 1.1. This specification was released in September 1998.
- USB 2.0. This model was released in 2000.
Specifications of each model
The first model is USB 1.0. In this specification, there are two modes of operation:
- Low bandwidth.
- With high bandwidth.
The maximum cable length in this model is allowed for the first operating mode - three meters, and for the second working condition it reaches five meters. If you want to connect multiple devices, you can connect them up to 127.
The technical characteristics of the USB 1.1 model correspond to the first, but only all the problems and errors that occurred during its use were corrected. By the way, this is the first model that gained widespread popularity and quickly spread.
The third model is USB 2.0. There are three modes of operation for it, where both mice and joystick, and gamepads, and keyboards, as well as video devices and such devices that store information.
USB cables and connectors
At present, there are many different changes in the computer world. For example, there was already a new interface with a modification of USB 3.0, its speed is ten times stronger than the previous model. But There are other types of connectorsknown as micro and mini yusb. They, by the way, can be found now, for example, in tablets, phones, smartphones and in the other most diverse computer products.
Each such bus, of course, also has its own pinout or pinout. It is necessary in order to then manufacture the adapter at home, allowing you to move from one type of connector to another type. But this requires knowledge. For example, some knowledge of how conductors are located. For example, you can do so charging for any phone. If such work with connectors is performed incorrectly, then the device itself will be damaged.
There is a difference in the design of mini and macro devices. So, now they already have five contacts. And in the USB 2.0 device you can count nine contacts. Therefore, the wiring of usb connectors in this model will take place a little differently. The same pinout usb connectors will be in version 3.0.
Unsoldering will take place according to the following scheme: first, the conductor is red in color, which is responsible for supplying the voltage that feeds. Then follows the conductor of white and green color, the task of which is to transmit information. Then it is necessary to go to the black conductor, which accepts the supply of zero voltage, which is supplied.
In the design of USB 3.0 wires are located quite differently. The first four of them are similar in their connector to the device model 2.0. But, starting from the fifth conductor, the connectors begin to differ. Blue, fifth, posting conveys information that has a negative value. Yellow conductor transmits positive information.
You can also pinout the device according to colors that are suitable for connectors of all devices. The advantages of such connectors is that when using them no need to restart the computer or even try to somehow manually install all the necessary drivers.