What is Analogue Representation?

 

Examples of digital objects are :-

1. A die(dice). It has 6 separate faces.

2. A blinker on a car. ON and OFF.

3. Steps.

 

Examples of analogue objects :-

1. Volume control on the TV.

2. Dimmer on lights.

3. An escalator.

 

An analogue representation does not have clearly defined stages or steps. We sometimes can create digital systems that have such small steps it seems continuous and analogue. For example, look at the hands of an "analogue" watch. It may seem that the hands move smoothly but if you could check more closely the hands step their way around the watch. That is, it is digital.

 

Other Digital Codes

In order to represent systems that need arithmetic the binary, the octal and hex codes are useful. But, they are not the only codes that are useful. If we want to tell the computer which keys on the keyboard we have pressed we use the ASCII code. It still looks like binary because it is made up of zeros and ones. It cannot be added and subtracted with any meaning. ASCII stands for American Standard Code for Information Interchange. The code is a seven bit code which can represent 128 different characters.

 

Look at the table and we will encode DIGITAL! in ASCII.

D       column 4, row 4                       D       =       100 0100

I        column 4, row 9                       I        =       100 1001

G       column 4, row 7                       G       =       100 0111

I        column 4, row 9                       I        =       100 1001

T       column 5, row 4                       T       =       101 0100

A       column 4, row 1                       A       =       100 0001

L       column 4, row 12                     L       =       100 1100

!        column 2, row 1                       !        =       010 0001