Browsing Tag

keyboard

The Humble Computer Mouse

The choice of computer mouse is a very individual thing and depends on many factors:

  • How many hours a day you work at your computer?
  • Is your primary computer a desktop, a laptop or notebook or even a tablet; but you won’t be needing a mouse if it is a tablet, will you?
  • How big your hands are.
  • Do you want/need to use wired, wireless or bluetooth?
  • Whether you use the scroll function or not.
  • Do you suffer from wrist pain?

In some of these instances, the cheaper type mouse that comes with your computer will serve your needs adequately, but if you, like me work for about eight hours every day, the comfort and functions of your mouse are particularly important.
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On the left below is a photo of the first mouse I paid in excess of $60 for and never regretted it at all. It was comfortable in my largish hands and I didn’t ever suffer any wrist pain even though I worked at my PC sometimes up to 12 hours in a day. The day I dropped it on the tiled floor and broke it was a very sad day for me.
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Luckily I was able to buy another different model  but with the same profile within a couple of days. That one too has died lately so I’m looking for a new one, the Kensington mouse on the right below might well be the one since I have had a word in Santa’s ear!
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The logitech 2nd from left has served as my laptop mouse for a couple of years – it does look a bit battered, doesn’t it? Very similar profile and quite comfortable. The third photo shows my big hands – imagine my right hand wrapped around one of these tiny mobile models! However, I do carry a retractable one around in my laptop bag, as a backup and the occasions when an extra mouse is needed to test someone’s computer.

 History of the computer mouse

Tracking Technology

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Did you know that the name mouse is derived from “Manually Operated User Select Equipment”? This makes the argument about whether more than one computer mouse should be called computer mouses or computer mice (as we do for the rodent variety). It seems there has been no absolute ruling and generally computer companies avoid the issue by calling them mouse devices. Probably mouses is technically correct, but it sounds awkward and people tend to use mice for the plural form.
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The original design for a mouse was mechanical; the mouse had a ball in a compartment underneath and embedded around the edge were some little rollers. These would clog up from the dust and dirt from the user’s desk and needed cleaning to keep the mouse running smoothly (I did this countless times when clients or friends complained that their mouse wasn’t working properly). There were also four sliding type feet that clogged up as well, but these devices were a boon when the alternative was just keyboard shortcuts.
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Along came optical technology and made our lives so much easier. A small LED on the bottom of the mouse translates the movement of your hand into movement of the mouse pointer. Laser mouse devices work the same way, but using a laser instead af the LED. Laser mice have a higher dpi (dots per inch) which means they are more sensitive. For general users this extra sensitivity is not really needed, but graphic designers and gamers often appreciate the difference and make a laser mouse their choice.

Wired Connectors

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The early mice (see above) had a serial connector plug, see picture below. Serial ports were the original standard for interfacing any device with any other device on a computer. Later, a smaller 6 pin Mini Din was introduced by IBM on their PS/2 personal computer and this led to the connector type being called PS/2. For many years PC’s had PS/2 connectors for both keyboard and mouse.
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Some computers still come with two PS/2 ports, but more commonly they just have one, the USB (Universal Serial Bus) being the most common type of interface on all computers, whether PC or Mac. All USB ports look the same, but there is the original USB 1.1 and USB 2.0 which allows much faster (almost 40x as fast) or increased delivery capabilities. The ports are backwards compatible, so you can plug an old USB 1.1 device into a 2.2 port and it will still go.

Wireless

Originally the mouse device was connected to the computer by a cable using one of the technologies above, but nowadays you have the choice (an increasingly common one), to go with wireless. The early hassles of wireless connections seem to have been ironed out and wireless usually works very easily on any platform. Yay! So much more freedom.

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Radio Frequency – this is the most common type of wireless interface. A generic mouse operates on th 27MHz frequency and the mouse is powered by batteries. More expensive models can come with rechargeable batteries or charging docks for the mouse. They may use higher frequencies and have a longer range.
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bluetooth.
Bluetooth was useful for lower speed devices like a mouse and was common on early laptops. They are also battery powered and use the 2.4GHz radio frequency to communicate with a receiver/charger supplied with the package or some other Bluetooth adapter...
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RFIDRFID (Rapid Frequency Identification) technology uses radio-frequency electromagnetic fields to transfer data to automatically identify and track tags, which for a mouse is movement. Developed by a company called A4Tech, the mouse must be used in conjunction with the included mose pad, but the advantage is that it is wireless and no batteries are needed.
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Wheels and Buttons

Nearly all mouse devices nowadays have three buttons, with the middle button also being a scroll-wheel. This scroll wheel is essential in my opinion to navigate up and down your screen and on web pages. Any other buttons, typically on the left hand side for a right handed mouse or on the RHS for a left handed mouse, can be programmed by the user to carry out different functions.

 

Buying a computer mouse

A quick search on eBay will show just what a variety of choice there for buying a new mouse – some are fun, some are fancy, some for serious gamers and some ergonomic models for users like me. So how do you choose?

Narrow down the options with these requirements:

  • Do you want wired or wireless?
  • Do you need laser or will Optical suit your needs?
  • What size – full-sized, medium or small (also called compact,  mini, mobile, laptop etc)
  • PS/2 or USB? USB is more common but if your computer does not have many USB ports, but does have PS/2 ports, using a PS/2 mouse (or keyboard) will leave an extra USB port available for other peripherals.
  • Scrolling – do you need left and right as well as up and down?
  • Buttons – does your work (or play) require advanced features?

A great place to see what is available is on eBay, even when you want to shop locally. The wide variety of mouse devices listed there will give you a good idea of all the functions and help you narrow down your choice.
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I have a mouse collection on eBay, just for the fun of it – see some of my pics

See my Collection here http://www.ebay.com/cln/plfbus/Fun-Fancy-Mouse-Collection/66866785015

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Computer Hardware – Info for Beginners

There is more to your  computer than the monitor, the keyboard and the mouse, though most of the other components are hidden away.

In that big box that you often complain about being too bulky, lies the heart of the computer.

It houses all the vital parts that make your computer fully functioning.

Get to know some of these parts.

  1. The processor or CPU (Central Processing Unit) determines how fast your PC will be & is perhaps one of the vital parts of a computer, if not the most vital. Having a fast processor will allow your computer to convert data faster

Software Crashes – Prevention & Recovery

These days, most of us have a lot of software on our PCs and we need to know how to take care of our system to minimize the possibility of a crash.

(For beginners, the following words  have a computer specific meaning)

1. Crash – When a program or your entire computer stops working and you cannot move the mouse or use the keyboard, and the screen is frozen.

2. Reboot – When you restart your computer after a crash.

3. Control Panel – A feature of Windows that will give you access to system utilities and settings.

4. PC – just another term for your computer (short for Personal Computer – from early computing days)

What should you do first if your PC crashes? Try to stop work, go away & leave it for a few minutes. Often, the computer is trying to process a whole string of commands and might just need to take a little more time. Pressing more keys will just add to the computer’s processing queue, maybe even forcing a crash.

Most of the time the hardware is OK, but the software has caused a problem. A good way to try to recover from a problem is to press the Ctrl + Alt + Delete keys. In XP this will open the Task Manager and show you all the programs running. Note that at least one will probably have a non-responsive indication. Try clicking one at a time on the programs listed that are “Not Responding” and click “End Task”. After that, close the dialog box and see if your computer is working again.

This should solve about 98% of your crashes. If your computer is not responding after all this, you can try restarting. Switching off the entire power is the last resort and should not be done unless everything else has not worked.

To prevent computer crashes, it’s worthwhile to carry out ongoing file maintenance. Check that you have room on your hard drives. To do this, open My Computer and right click on the drive you want to check (e.g. C:) and then click “Properties”. You will get a pie chart showing how much used & free space is on the drive. Windows needs plenty of working space & the suggestion is not to go over 70% usage of your total hard drive space.

You may need to delete or move  any large audio or video files that are occupying too much space to another hard drive or a CD.  When you are short of space,  it is also advisable to remove software programs that you don’t use by going to “Start”, “Control Panel”,  “Add or Remove Programs”.

Make sure you have enough Memory or RAM (Random Access Memory).  If your RAM is low,  help out your computer by not opening too many programs at once.  To find out how much RAM your computer has, select Control Panel from the Start Menu, Double Click System Tools, and then open the System Information tab. The total and available memory is listed towards the bottom of the right panel when you click on System Summary.

Software programs that use the most RAM are those that include a lot of graphics, video or sound capabilities. If your system runs slowly and you use this type of program a lot, it might be worthwhile to upgrade your RAM

Back up your hard drive regularly. There are notes on how to do this online and it is very important and should be done consistently. This way you will not lose a lot of work should you have to turn off power or restart your computer due to a crash (or a power failure!). Losing work is never fun and can be avoided by a little preventive maintenance.

Best Wishes
Trish