USB it means Universal Serial Bus a connection technology for attaching peripheral devices to a computer, providing fast data exchange.
In todays world all computers,laptops came with USB port we all are quite much familiar with use of that we use pen-drives, mobile, i-pods we can connect this device with USB cable to the computer
here is picture shown below how it's look
(USB PORT in computer)
below picture is shown usb cable which is use to connect device to computer
First released in 1996, the original USB 1.0 standard offered data rates of 1.5 Mbps. The USB 1.1 standard followed with two data rates: 12 Mbps for devices such as disk drives that need high-speed throughput and 1.5 Mbps for devices such as joysticks that need much less bandwidth.
In 2002 a newer specification USB 2.0, also called Hi-Speed USB 2.0, was introduced. It increased the data transfer rate for PC to USB device to 480 Mbps, which is 40 times faster than the USB 1.1 specification. With the increased bandwidth, high throughput peripherals such as digital cameras, CD burners and video equipment could now be connected with USB. It also allowed for multiple high-speed devices to run simultaneously.
What is USB cable?
The devices connected to a USB port rely on the USB cable to carry power and data.
Inside a USB cable: There are two wires for power -- +5 volts
(red) and ground (brown) -- and a twisted pair (yellow and
blue) of wires to carry the data. The cable is also shielded.
How can we find that usb device is connected to computer?
there is a simple feature of USB that it is plug and play as soon as user connect usb device there is symbol like
(at the task bar)
In todays world all computers,laptops came with USB port we all are quite much familiar with use of that we use pen-drives, mobile, i-pods we can connect this device with USB cable to the computer
here is picture shown below how it's look
(USB PORT in computer)
below picture is shown usb cable which is use to connect device to computer
First released in 1996, the original USB 1.0 standard offered data rates of 1.5 Mbps. The USB 1.1 standard followed with two data rates: 12 Mbps for devices such as disk drives that need high-speed throughput and 1.5 Mbps for devices such as joysticks that need much less bandwidth.
In 2002 a newer specification USB 2.0, also called Hi-Speed USB 2.0, was introduced. It increased the data transfer rate for PC to USB device to 480 Mbps, which is 40 times faster than the USB 1.1 specification. With the increased bandwidth, high throughput peripherals such as digital cameras, CD burners and video equipment could now be connected with USB. It also allowed for multiple high-speed devices to run simultaneously.
What is USB cable?
- A USB cable has two wires for power (+5 volts and ground) and a twisted pair of wires to carry the data.
- On the power wires, the computer can supply up to 500 milliamps of power at 5 volts.
- Low-power devices (such as mice) can draw their power directly from the bus. High-power devices (such as printers) have their own power supplies and draw minimal power from the bus. Hubs can have their own power supplies to provide power to devices connected to the hub.
The devices connected to a USB port rely on the USB cable to carry power and data.
Inside a USB cable: There are two wires for power -- +5 volts
(red) and ground (brown) -- and a twisted pair (yellow and
blue) of wires to carry the data. The cable is also shielded.
How can we find that usb device is connected to computer?
there is a simple feature of USB that it is plug and play as soon as user connect usb device there is symbol like
(at the task bar)
A sample list of USB devices that you can buy today includes:
- printer
- scanners
- Mice
- Joysticks
- Digital cameras
- Web cams
- Scientific data acquisition devices
- Modems
- Speakers
- Telephones
- Video phones
- Storage Devices
- in the next post we talk about other connection method....
- Thank you..
