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Mouse

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What is Mouse?

A computer mouse is a handheld hardware input device that controls a cursor in a GUI and can move and select text, icons, files, and folders. For desktop computers, the mouse is placed on a flat surface such as a mouse pad or a desk and is placed in front of your computer.

The computer mouse is considered an input device. With a click of a button, the mouse sends information to the computer. The computer mouse is an interesting device that offers an alternative way to interact with the computer beside a keyboard.

A typical mouse has two buttons. At the top of the device you will find a left and right button which allows for “clicks”. There is a scrolling wheel between the two buttons.

 

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History of Mouse:-

In 1964 Douglas Engelbart (1925-2013), a researcher at Stanford Research Institute, wanted to find a way to make using computers easier. In those days, computers were large and expensive. Using them was very hard because everything had to be typed in by hand, and there was no way to alter things if you made a mistake.

After studying and designing for a long time, Engelbart succeeded in inventing an input device which he named 'XY index'.

At first, it needed two hands to use, but it was changed so that only one hand was needed to use it. This model was more like the mouse that we use today. Xerox Palo Alto Research introduced a GUI in 1981, using a mouse.

The mouse was used with Macintosh of Apple Inc. when it came out in 1984. Microsoft Windows also used the mouse when it came out, so over time computer mice became used with many computers. Modern mice have three buttons: left button, right button, scroll button.

 

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How an optical mouse works?

An optical mouse works in a completely different way. It shines a bright light down onto your desk from an LED (light-emitting diode) mounted on the bottom of the mouse. The light bounces straight back up off the desk into a photocell, also mounted under the mouse, a short distance from the LED. The photocell has a lens in front of it that magnifies the reflected light, so the mouse can respond more precisely to your hand movements. As you push the mouse around your desk, the pattern of reflected light changes, and the chip inside the mouse uses this to figure out how you're moving your hand.

Some optical mice have two LEDs. The first one shines light down onto the desk. The light from that is picked up by the photocell. The second LED lights up a red plastic strip along the back of the mouse so you can see its working. Most optical mice also have a wheel at the front so you can scroll pages on-screen much faster. You can click the wheel too, so it functions like the third (centre) button on a conventional ball mouse.

 

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