Computer Mouse
About
A mouse is a small hand-held pointing device that can sense the movement of itself. These are widely used in Graphical User Interfaces (GUIs) where users move the mouse across to the flat surface to move the cursor and select various GUI objects.
A mouse can be of three different types. They are,
(i) Mechanical mouse
(ii) Optomechanical mouse
(iii) Optical mouse.
History of Mouse
In the year of 1963, Engelbart has established the research lab at SRI, Named of Augmentation Research Center (ARC), to pursue his objective of developing both hardware and, software computer technology to “augment” human intelligence.
On November fourteen, 1963, he 1st recorded his thoughts in his personal notebook regarding one thing he at the start referred to as a bug, which could be a 3-point kind that would have a drop purpose and a couple of orthogonal wheels. He wrote that the bug would be easier and natural to use, and in contrast to a method, it might keep still once yield, which meant it might be “much higher for coordination with the keyboard.
In 1964, Bill English joined in ARC, where he helped the primary mouse paradigm. many different experimental pointing devices developed for NLS (oN-Line System) exploited the various body movements, as example, head-mounted devices hooked up to the chin or nose – however, ultimately the mouse did win out attributable to its speed and convenience.
The first mouse could be a large device (pictured) uses 2 potentiometers perpendicular to every different and connected to wheels: the rotation of every wheel translated into motion on one axis. At that point in the “Mother of All Demos”, Engelbart’s cluster had been mistreatment their second-generation, 3-button mouse for a couple of years.
Infrared Mouse
An infrared mouse is another input device that is similar to that of a traditional mouse except for the fact that it does not need any sort of cable to connect with the actual device (or) system. In place of cables, they use infrared light for connections. it is through this light that the infrared mouse communicates with the receiver unit. This light cannot pass through the objects, hence it is necessary that the infrared mouse is in direct line of sight with the receiver unit. This unit has a physical connection with the actual system and has the ability to receive the signal from an infrared mouse thereby facilitating communication with the actual system.
Optical Mouse
An optical mouse is an advanced pointing device that detects the mouse movement using LED optical sensors. Though these mouses are more expensive than mechanical and optomechanical mouse, they offer more precision and speed. Such mouses can be used on any surface i.e., they do not require any flat surface like mousepads. In addition to this, an optical mouse has many benefits over other mouses. Because of this, they are extensively used in both homes and businesses.
Working of Optical Mouse
Optical mouse does not use a ball that is rolled against a mouse pad to indicate the mouse movement, instead it uses a camera and digital processing technologies for detecting the mouse movement. The camera which is inside the optical mouse takes microscopic snapshots (which are> 1000 pictures per second) of the surface.
The light-emitting diode present in the mouse is responsible for providing a light beneath the mouse that helps in detecting the minor differences in the underlying surface Once the differences are known, they are transmitted back to the camera where these differences are processed using the digital processing technologies.
This processing is done in order t compare the pictures and to determine the speed and direction of the mouse movement. The advantage of using digital processing technology is that it results in accurate performance when compared to other earlier technologies.S
