Mouse

The mouse or mouse is a small device that allows point and get information. Is called mouse because of its appearance. A regular mouse is dragged over a flat surface (desk or table) the move made by the mouse is reflected in the monitor by an arrow mouse pointer call. The action of pressing and releasing a button called search.

MOUSE types or models
Several types of mice (mise):

1. Mechanical mice.
Mechanical mice consist of a ball placed on its bottom for two wheels move generate pulses in response to movement on the surface thereof. The ball, moving the mouse, touches a wheel-shaped contacts that indicate the movement of the cursor on the screen of the computer system.
The internal circuitry counts the pulses generated by the wheel and sends the information to the computer, which processed and interpreted by software.

2. Optical mice.
Optical mice have a small laser beam instead of the rolling ball mechanics. An optical sensor located within the body of the mouse detects movement of the reflex to move the mouse over the mirror and the position of the cursor on the computer screen.
An optical mice limitation is to be placed on a surface that reflects the light beam. Therefore, manufacturers usually ship with a small mirror shaped template.
Optical mice avoid the common problem of the accumulation of dirt on the drive shaft, and its optical characteristics are less likely to suffer a disadvantage similar. It is considered one of the most modern and practical today. It can provide a maximum of 800 dpi, as many different points that can recognize by 2.54 centimeters (one inch) to perform worse fewest motion sensor. Its operation is based on an optical sensor photographing the surface on which it is and detecting variations between successive pictures, determine if the mouse has changed its position. In polished surfaces or on certain materials, the optical mouse because twitch on the screen, so it is necessary to use a mat.

3. Laser mice.
This type is more sensitive and precise, making it advisable especially for graphic designers and video game fans. It also detects the sliding movement on a horizontal surface, but the light beam optics technology is replaced by a laser (invisible to the human eye) with resolutions from 2000 dpi, resulting in a significant increase in the accuracy and sensitivity .

3. Mice Trackball.
The concept of a trackball is a novel idea that part of the act: to move the pointer, not the device, so it is adapted to make a ball, so that when you put your hand can move up through the thumb , without having to move around the entire hand or as before. Thereby reducing the effort and the need of space, in addition to avoiding a possible pain forearm by this movement. Some people, however, will not be really comfortable finish. This guy has been very useful for example in the computerization of shipping.