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What’s a USB Hub?

August 11th, 2009

Since the mid 90’s we have seen the birth and growth of a connective technology called Universal Serial Bus (USB). Originally designed to connect personal and telecoms equipment, it has slow become the primary means of connecting a entire host of other devices and has made important contributions to today’s IT world.

The sheer number of USB products on the market now is merely staggering, from mice and keyboards, modems, external hard drives to USB fans, lights and coffee cup warmers! Most external personal related devices now connect to a personal via a USB port. So it’s no wonder that before long, most personal users obtain themselves wondering what to do when the USB ports (sockets) on their personal are all used.

There are 2 answers to the problem, constantly plug and unplug connectors when swapping between USB devices, or invest in a simple, low price device called a USB Hub. A USB Hub is a small unit with 2 or more USB ports, which plugs into an USB port on your computer, allowing you the freedom to connect more USB devices without disconnecting others. Expanding the number of USB ports of your personal in this way not only saves wear and tear on your USB ports and connectors, but also puts and end to all that clambering around behind your PC! Generally speaking, there are 4 types of available:

1. Internal USB PCI Card
An internal PCI USB Card needs to be installed by opening up the case of your Computer and inserting a card into a vacant PCI slot on the motherboard, this type of USB expansion is not advised unless you are familiar with working with and inside computers. If you have the older USB1.1 and upgrade to USB2.0, your variation of Windows will also require to be updated so that your Computer can support USB2.0 functionality.

2. USB Hub (Non Powered)
An external non-powered USB Hub is a cheap and easy device that plugs directly into 1 of your computer’s existing USB ports and that is all there is to it. These are usually very compact and so make ideal answers for mobile users with laptops and for desktop users.

Be aware that some USB devices require a small amount of power through the USB port, usually mechanical devices such as printers, scanners, digital cameras and so on. This type of USB Hub might not be capable to supply sufficient power to these devices especially if you are using a few USB devices together.

3. Powered USB Hub
An external Powered USB Hub is also compact and plugs directly into 1 of your computer’s existing USB ports, so again there is no require to open up your personal to install it. The only difference is that the Powered Hub comes with a separate power supply that must be plugged into the mains socket, supplying the power to all the USB ports on the hub allowing ANY type of USB devices to function properly.

Most Powered Hubs come with a sensible length of USB cable allowing the Hub itself to be positioned in a more accessible place e.g. on top of your personal or on your desk, making plugging and unplugging USB devices much easier. This makes the Powered Hub the all round ideal solution for desktop personal users.

4. USB Computer Card
If you use a Laptop and are on the move, you have an additional choice to the USB Hub, the USB Computer Card also known as the PCMCIA USB Card. This device slots into the PCMCIA slot/port found on the side of a Laptop and instantly provides 2 additional USB ports without using up any of your existing USB ports on the Laptop.
This is the most common solution for mobile Laptop users. When buying a suitable external USB Hub, think about the location of your computer’s USB ports. If they are located at the back of your personal or in an awkward position, you can make your life so much easier by using a USB Hub that comes with a USB extension cable, or by buying a separate USB extension cable. This lets the USB Hub to be positioned to a more accessible place for plugging and unplugging your USB devices.

USB Flash Drive

August 10th, 2009

USB flash drive or any other flash memory drive is basically an EEPROM that means “Electrically Erasable Programmable Read Only Memory”.

USB flash memory sticks are nothing but an assembly of EEPROM, a controller with a RISC microprocessor, RAM and ROM. All of this interacts with a personal using a USB controller and connector.

Because USB sticks are EEPROM these can hold data for as long as ten years. As these memory modules are shock proof and as these do not have a volatile memory are good enough to sustain shock and humidity to some extend that is casual abuse that includes run through a washing machine, or even dropped in coffee.

UBS thumb drives normally do not require drivers but with few old operating systems like Windows 98 and Windows 95 you require drivers that are provided by the manufacturer. Latest OS think about USB drives as USB Mass storage devices and have built in support for these drives that means you do not require any drivers merely plug in the drive and begin using it.

Some Linux versions might recognize it but will not let you use it until you manually mount the drive. To mount to drive manually use the command

“mount -vfat (drive to mount) (directory to mount at)”
Eg. “mount -vfat /dev/sda1 /mnt/usbdrive”

Manufacturers are also coming up with systems that have bios support for USB that means you can boot from the small USB drive. There are different versions of operating systems coming up that can be installed on a ROM and are so small to fit a USB drive as well. Most of these OS versions are Linux based for example Damm Small Linux.

USB drives are mainly used to carry personnel data. But you require to be very careful with your personnel data today days. You can have anything in your personnel data collection that you have forgotten for example bank account details or anything. Try using some encryption engine to secure your data. You can use encrypted file system over the USB drive but then you will be capable to access your drive only at few personal not all. Or you can have a encryption application that can run without installation from your USB. The ideal would be to use biometric USB drives.

USB Extension Options: Breaking the 16 foot barrier

August 8th, 2009

For the past 10 yrs USB and FireWire have struggled to dominate the desktop interface market. Until five yrs ago, because of the relatively fast 4 hundred Mbps offered by FireWire, USB, jokingly referred to as Ultra Slow Bandwidth, was relegated to low-bandwidth applications such as keyboards and mice. At the end of 2001, however, USB dealt a fatal blow to FireWire with the release of the untried USB 2.0 standard offering a maximum speed of 480 Mbps, faster than the theoretical limit of FireWire (though, in practice, usually slower).

It seems that USB has essentially won the standards battle with FireWire because of its relative low-cost and high availability. The limitation of USB (both the 1.1 and 2.0 standards basic today) is the 16 foot limit. When you have more than 16 feet between your personal and your USB device you will see important degradation in the signal that can cause problems ranging from slower transmission speeds to an entirely dropped connection. This causes problems for people who desire to run a USB cable to a printer located in another room, to a presentation keyboard/mouse combo or any other USB device that might be in a remote location.

The cheapest (and arguably easiest) way to extend the distance to your USB device is by using a USB Active Extension Cable. These cables have built-in USB repeaters that in reality boost the USB signal, allowing you to go further than the 16 foot maximum distance. The most basic length for these cables is 16 feet and you can chain up to 4 of these together with no loss in signal. Assuming you are using the longest USB device cable available (also 16 feet), USB Active Extension Cables grant for a maximum distance of 80 feet between your personal and USB device. They are available in USB 1.1 (12 Mbps) and USB 2.0 (480 Mbps).

For most USB extensions 80 feet is long enough, but what if you require to go further? Super USB Extenders grant you to extend the distance to your USB devices up to 150 feet with no loss in signal. The Super USB Extender uses similar technology for the male and female interfaces, but rather than have a regular USB cable in the middle, it uses a Cat five cable (also known as a networking cable). The advantage of Super USB Extenders, other than the increased maximum distance, is the capability to create a custom length. If you require to go 63 feet, for example, you can simply use a Super USB Extender with a 63 foot Cat five Cable between the booster and receiver. Super USB Extenders are also available in USB 1.1 and 2.0 interfaces.

If you are looking for a connection beyond 150 feet, numerous manufacturers offer a special Super USB Extender able of USB transfer with no signal loss at 330 feet, though this is restricted to USB 1.1. Black Box has produced a USB 1.1 extender able of transmission up to 1000 feet without signal loss, perfect for connecting your personal to a security camera or webcam hundreds of feet away from your computer.

Another exciting innovation for USB extension technology is the pending release of Wireless USB. Wireless USB hubs and devices are anticipated to show up in early 2006 with maximum distances over one hundred feet. Keep in mind that this is the 1st release and as the technology matures this distance limitation will inevitably be lifted in favor of much further distances.

Computer - Basic Terminology

August 7th, 2009

Have you ever wondered what the names are of the devices connected to, and in, your computer? There are numerous people out there who have never owned a personal or who have a personal but do not know what the appropriate terms are for the things that come with it. This article explains what those names are and provides a tiny bit of information about how they function.

Generally, all personal come with a few common devices. These usually include a Monitor, keyboard, mouse, printer, and the personal (also known as the tower or case).

Monitor – The monitor is the device that looks similar to a TV. There are numerous types of monitors but the most common is a 17 inch CRT (Cathode Ray Tube) monitor. A CRT monitor is very similar to your standard TV. There is a untried type of monitor that is becoming very popular, it’s called an LCD monitor. An LCD monitor is quite a bit smaller and the quality is somewhat better.

Keyboard – The keyboard is 1 of the most common input devices. This is the device that has all the numbers, letters, and symbols that you use to type words on the computer.

Mouse – This is the other most common input device. It is a small mouse-like device connected to your personal that lets you move the pointer around the screen and click on icons.

Computer – This is the device that houses the “Guts” of your computer. Inside is where all of the magic happens. Generally, inside a personal case you will obtain a hard drive, system board, RAM, network card, and all the other devices that let you do all of the fun things that personal nowadays let you do.

Printer – This is the device that lets you turn what you see on your computer, into hard duplicates on paper. There are numerous types of printers, such as: ink jet, laser, and dot matrix. Some printers also come with built in scanners (to digitize paper documents), fax machines, and photocopiers.

This is merely some common information that has, hopefully, helped you improved comprehend your computer. You might think that most people ought already know this but you might be surprised at how numerous do not.

Top 10 Uses For USB Drives

August 6th, 2009

USB drive is 1 precious gift that mankind has received from technology. Universal Serial Bus or USB is famous with many different names such as Key Drive, USB Key Drive, USB Pen, Microdrive, Thumb Drive and Flash Drive.

Regardless of the name, these USB drives are an excellent and exceptionally handy tool. They are exclusively for the people who use personal at many different locations and require to take data along with them. The USB drivers are great-to-use, as they are small in size, can fit in your pocket or can act as your important chain. You can get about 32 MB to four GB of storage without any require of software. Just plug the drive in the USB port of personal to get instance storage and ready transfer.

Now let’s peep into the top ten uses of USB drive.

USB Drive is multifunctional or say, support all-in-one in printer connectivity. It can typically combine the printer, copier, fax, scanner and the storage options in merely 1 convenient device. It lets the companies, especially the small ones to save overall price by offering about four or five devices in merely one.

It gets you network scanning. You can utilize scanners to image the documents more frequently than you ever did before. The USB device server then lets the USB scanner to connect directly to the network.

You can change the conference room from a static to a dynamic one. Just attach all the USB devices of conference room to grant all the participants of meeting room to use the drive. Get the MFP, electronic whiteboard, laser printer and share storage drive networked together with a device server.

Believe it or not USB drives have blessed the sewing machines with ideal options and abilities they had ever before. Most branded sewing machines such as Brother, Pfaff, Janome, Singer and Bernina have invented machines with USB connections. One can connect the machines to the Computer or to USB pen drive to download software upgradation and patterns to sewing machine.

You can be benefited with wireless access of iPod. The iPod users can merely connect the iPod to wireless device server. You can download all the music in a wireless way from personal to iPod. Your iPod is fully loaded to go out to the party.

It is a ideal way to get a camera networked. Connecting the USB enabled digital camera to the network can benefit the corporations and their consumers. With digital camera joined with wireless USB device, the operator can access digital pictures quickly.

It is the ideal help for the graphic designers. The graphic designers’ workplace has a digital camera, internal and external DVD or CD burner, scanner, pic printer and storage devices. The USB device is must for sharing the network workgroup.

USB drive helps in establishing the reliable backup plan for network surroundings.

The mobile worker can access the USB device and take with them whatever they desire to data, music, pictures or merely anything.

Workgroups generally utilize the USB peripherals beyond the keyboards and mouse. The scanners, multifunctional printers, laser printers and storage drives are the most employed USB enabled devices.