USB

USB

Anyone who has been around computers for quite two or three years knows the matter that the Universal Serial Bus is trying to unravel — within the past, connecting devices to computers has been a real headache.

                             

• Printers connected to parallel printer ports and most computers come together. Things like Zip drives, which require a high-speed connection into the pc , would use the parallel interface also , often with limited success and not much speed.

• Modems used the interface , but so did some printers and a spread of strange things like Palm Pilots and digital cameras. Most computers have at the most two serial ports, and that they are very slow in most cases.

• Devices that needed faster connections came with their own cards, which had to suit during a card slot inside the computer’s case. Unfortunately, the amount of card slots is restricted and you needed a Ph.D. to install the software for some of the cards.

• The goal of USB is to finish all of those headaches. The Universal Serial Bus gives you one , standardized, easy-to-use thanks to connect up to 127 devices to a computer.
  

Just about every peripheral made now comes during a USB version. A sample list of USB devices that you simply can purchase today includes:

• Printers

• Scanners
  

• Mice
  

• Joysticks

• Flight yokes

• Digital cameras

• Webcams

• Scientific data acquisition devices

• Modems

• Speakers
  

• Telephones

• Video phones

• Storage devices such as Zip drives

• Network connections
  

How USB Ports Work ?

Just about any computer that you simply buy today comes with one or more Universal Serial Bus connectors on the rear . These USB connectors allow you to attach everything from mice to printers to your computer quickly and simply . The OS supports USB also , therefore the installation of the device drivers is quick and straightforward , too. Compared to other ways to connect peripherals to your computer (including parallel ports, serial ports and special cards that you simply install inside the computer case), USB peripherals are incredibly simple! Just about any computer that you simply buy today comes with one or more Universal Serial Bus connectors on the rear . These USB connectors allow you to attach everything from mice to printers to your computer quickly and simply . The OS supports USB also , therefore the installation of the device drivers is quick and straightforward , too.

USB Connections

Connecting a USB device to a computer is straightforward — you discover the USB connector on the rear of your machine and plug the USB connector into it.

                                        

If it's a replacement device, the OS auto-detects it and asks for the driving force disk. If the device has already been installed, the pc activates it and starts lecture it. USB devices are often connected and disconnected at any time.

Most USB cables come with a built-in USB cable, so a cable with an “A” connection to it. 
If not, the device has an optical cable that accepts a USB “B” cable.

USB standards use the "A" and "B" connectors to avoid confusion:

                                    

"A" connectors head "upstream" toward computer. "B" connectors head "downstream" and attach to individual devices. Using various connectors at the upstream and downstream ends, it is impossible to ever get confused - if you connect the "B" connector of any USB cable to a device, you know it will work. Likewise, you will plug any "A" connector into any "A" socket and know that it will work.