For handling the user must get so used to move the pointer as to press with one or two clicks for most tasks. Has a large plastic ball, of several layers, in its bottom for two wheels move generating pulses in response to movement of this envelope surface. A variant is the model of Honeywell, uses two inclined wheels 90 degrees between them instead of a ball. Is a variant, lacks the rubber ball, which avoids the common problem of 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. You can offer a limit of 800 dpi (dpi English acronym: Dots per inch, literally dots per inch) and different amount of points that can recognize a few inches, the lower figure the worst act of motion sensor. This type is more sensitive, making it especially desirable for graphic designers and video game fans, for their excellent performance. Also used the surface which supports but the light beam of optical technology is replaced by a laser (not visible to the eye) of 2000 dpi which results in a significant increase in accuracy and sensitivity. The concept of a trackball is a novel idea that part of the act: it must move the pointer, not the device, which is adapted to provide a ball, so when you put your hand can move up through the thumb without having to move around or the whole hand as before. Thereby reducing the effort and the space requirement, in addition to avoiding a possible pain forearm by the movement thereof. Some people, however, not be really comfortable finish. This guy has been very useful in the computerization of such shipping. It is the most popular format and cheaper, however there are many added features that can raise their price for example if they use laser technology such as motion sensor. Currently distributed with two types of connectors possible, USB & PS / 2, was also once popular use the serial port. In this case the device is used without a physical cable communication between this and the computer, using some form of wireless technology. This requires a focus point of the wireless signal, a receiver, which batteries produced by the mouse or mouse, the issuer. The receiver is normally connected to the computer via USB or PS / 2. As wireless technology used can distinguish several possibilities. This is the most common and cost of such technologies. It works by sending a signal to a frequency of 2.4GHz, popular in the mobile phone or cell phone, the same as the IEEE 802.11b and IEEE 802.11g. It is popular among other things, his few mistakes of disconnection or interference with other wireless equipment, in addition to having a sufficient range: 3 meters or 10 feet. This technology uses infrared frequency signal as a means of data transmission, also popular among controls or remote controls for televisions, stereos or cell phones. Unlike the former, having a medium range less than 3 meters, has been less successful. In addition to both the sender and receiver must be in a visual line of contact, directly and interrupted, so that the signal is received correctly. Bluetooth is the latest technology and wireless transmission (IEEE 802.15.1), with some success on other devices. Its range is about 10 meters or 30 feet (corresponding to the standard Bluetooth Class 2). It is some time, common in computer equipment so that all modern operating systems often include software serial, driver (driver), essential for this to work immediately and correctly. However, it is normal to find the manufacturer's own software that can add a number of optional features or proper drivers if needed. Until mid-2005, the well-known Apple Mac systems continued to bet on a mouse or a single button mouse, designed to facilitate and simplify the user the various possible tasks. Today has launched a two-button model with simulated or virtual sensors beneath the plastic cover, two programmable side buttons and a ball to move the pointer, called Mighty Mouse. In Windows, the most common is the use of two or three main buttons. On UNIX systems like GNU / Linux to use graphical environment (X Window), was common to have three buttons (to facilitate the operation of copy and paste data directly). At present, the third button functionality is often built into the central wheel so that besides being able to be rotated, can be pressed. Today every modern operating system can use up to three different buttons and even more extra buttons to acknowledge that the software recognizes and can add other specific functions such as allocating a fourth and fifth button operation to copy and paste the text. The sophistication has gone to extremes in some cases, such as Logitech MX610, launched in September 2005. Prepared for right anatomically, has up to 10 buttons. As mentioned, the most common failure in mechanical technology arises because of the accumulation of dirt stopping or hindering the movement of the pointer on the screen. The solution is simple, can be easily removed the rubber ball on the bottom and thus have access to the axes of plastic for cleaning, for example with a small hard brush. This problem is nonexistent or negligible optical technology, by replacing the mechanical sensor for detecting an optical displacement. One of the main reasons for its success. Another problem may be loss of feeling or touch of buttons appears when you press a button once and the computer receives it as none, two or more consecutive click, so wrong. This is due to wear plastic pieces, part of the mouse buttons, no longer beat or pressed correctly on the electronic scoring. To fix it usually must be removed completely and put several layers of masking tape on the possible area worn to recover its original shape. In case of frequent use, the wear is normal, can be given to less than a millimeter per 5 years of life. If the use of a computer is common, it is important to use a more ergonomic model is possible, since it can lead to important physical problems. The view, the spine, or wrist that makes use of the peripheral. This is totally flat position which takes the hand that can be enforced, or it can also cause a severe wear of small bone protruding from the wrist to the point to be considered an occupational disease. Mouse or mouse is a computer peripherals in the hand, usually made of plastic, used as input data or control. Is used with one of the two hands of the user and detects relative movement in two dimensions on the horizontal surface on which it rests, usually reflected through a pointer or arrow on the monitor. Today it is an essential element in a computer for most people, and despite the emergence of other technologies with a similar function as the touch screen, the practice has been shown to have many more years of useful life. However, the future could be to move the cursor or pointer with eyes or based on voice recognition software similar to ViaVoice for example.
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