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How to choose a computer mouse?
|/img >/img src="//images/stories/tip/comp-progs/mouse-choice-1.jpg" alt="How to choose a computer mouse?" align=left title="Как выбрать компьютерную мышь?" /> Without computer mouse work on the modern personal computer is simply inconceivable. Still in the sixties the XX centuries Douglas Engelbart invented this device and since then "mice" became an integral part of any computer.|
Computer mouse – one of the most inexpensive devices therefore not enough attention is paid to her choice: if only worked and cost not much. However from that, the mouse is how convenient and functional, convenience and speed of work for the personal computer depends. How to choose a good computer mouse?
By the principle of the device all mice can be divided into three groups: mechanical, the optical-mechanical, optical. The very first mice were mechanical. The cursor position in mechanical mice is defined thanks to rotation of the rubberized ball which is fixed between two vzaimnoperpendikulyarny rollers. These rollers are responsible for movement on axes H and U. Data from rollers in mechanical mice are transferred to contact copper system.
In the optical-mechanical mice the contact copper system is replaced by the so-called optopary: infrared receiver and photosensors. Mechanical and optical-mechanical mice have a number of essential shortcomings.
First, in them dirt that breaks normal work of a mouse very quickly accumulates. It leads to that the mouse needs to be sorted and cleaned. And secondly, the rubber ball in mechanical and optical-mechanical mice often sinks down, slips that also puts a mouse out of commission.
Optical computer mouses almost completely forced out the mechanical colleagues. In optical mice work is carried out at the expense of the light emitter and the receiver of a light signal. Light reflected from a surface on which there is a mouse is read out by the receiver and movement of a position of the cursor is calculated.
Due to the lack of the mechanical rubbing details optical mouses have powerful advantage – they are more durable, than mechanical. Besides, the optical mouse can work at any surface (except a mirror), it does not need a rug.
Sensitivity – one of the most important functional parameters of a computer mouse. It is measured in points per square inch (dpi). At optical mouses sensitivity is much higher, than at mechanical, and in modern models can reach several thousand dots per inch (1000-4000 dpi). High sensitivity is often most important for those who works with graphics as positioning accuracy for them has huge value.
One more important parameter is a frequency with which the mouse sends and processes a light signal. The more value of this parameter, the is higher the speed of work of a mouse. This parameter is especially important for gamers.
Computer mice are connected to the computer either via the PS/2 interface, or through USB. Wireless mice are separately allocated. In this case the mouse has no wires, and transmits a signal to the "base" connected to the computer through USB port. The wireless mouse from accumulators or batteries works, and therefore it is much heavier than the wire analogs.
The following parameters, such as functionality and ergonomics, are especially individual. Functionality of a mouse depends on existence of additional programmable buttons, a wheel of scrolling (skrol). The standard mouse has two buttons and often one wheel of scrolling. Mice with three and more buttons are necessary for the solution of specific tasks. For example, for the 3D - games, work in AutoCAD, etc.
The form and the sizes of the case of a mouse, and also its weight define ergonomics of this or that model. There are standard symmetric mice of a roundish form, there are so-called anatomic mice which case repeats brush bends. Anatomic mice promote more comfortable position of a hand during the work.
The size of a mouse is selected individually, depending on the hand size. Therefore the mouse upon purchase surely should be taken in a hand and to check as far as it is convenient.
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