History of computer mouse

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History of computer mouse

Dr. Douglas Engelbart has invented the first device that came out as mouse in the year1964.During this time the only way of moving the cursor around on a computer screen was using the arrow keys on the keyboard and it was really inefficient and awkward to use. A small brick like mechanism with one button on top and two wheels on the underside was made by Douglas.

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The purpose of these wheels is to detect horizontal and vertical movement and on the whole the unit was little bit difficult to use. For viewing the cursor on the monitor this unit was linked to the computer by a cable so the motion signals could be electrically transmitted .As the device with its long cable tail looked like a mouse so the name “mouse” came into picture.NASA team tried different methods of moving cursors and pointing to objects on the computer screen like the devices steering wheels, knee switches, and light pens, but in tests of these devices Engel arts mouse gained popularity. Engineers thought that the mouse was perfect for drawing and drafting purposes and could develop computer aided designs at their own desks. Slowly mouse began to be called as input/output device. To make the scrolling easier the mouse began to multiply rapidly and to make the mouse cordless by using the radio frequency signals. Mouse tail is the electrical cable leading out of one end and the other end is used for connecting to the central processing unit.

Composition of the Mouse

Body of the mouse:

* The outer surface of the mouse is Hard plastic body which the user guides across a flat surface

* The tail of a mouse is an electrical cable that leads out from one end and finishes at the connection at the Central Processing Unit

* It has one to three buttons at the tail end which are external contacts to tiny electrical switches

* With a click on the button the electrical circuit is forced to close and the computer receives a command

* Below the mouse there’s an plastic hatch that fits over a rubberized ball which exposes a small part of the ball

* A support wheel and two shafts hold the ball in place inside the Mouse

* Rotation of the spokes causes IR light signals from light emitting diode to flick through the spoke which are then captured by a light detector

* Phototransistors help to translate these light signals into electrical pulses which reach the integrated circuit interface in the mouse

* These pulses then confirms the IC whether the ball has followed an up down or left right movement

* The IC commands the cursor to move on the screen accordingly

* The interface IC is then ascended onto a printed circuit board

* This forms the skeleton to which each and every internal workings of the mouse are attached

* The information from the switches and signals from the phototransistors is collected by a computer chip or IC

* These are then sent to the computer by means of a data stream

The Brain of the Mouse:

* Every mouse design consists of an individual software known as driver

* These driver are external brain that enables the computer to understand the mouse signals

* The driver tells the computer how to interpret the mouse’s IC data stream including speed,

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