The "Know Hows" Zone!

The Web-log of an Engineer For The Digital Civilization :-)

Sunday, 26 July 2015

Number systems

A number system defines a set of values used to represent quantity.
The study of number system will give us an insight into how a computer manipulates and stores numbers.It is not only used in computers but also in various electronic devices.

1.  The Decimal number system.

  • The number system with which we are the most familiar with ,that which we have been taught in school is the decimal system.
  • The largest value of a digit in this system is 9.
  • Each digit represents a different multiple of 10.These multiples are also called as weighted values.
  • The leftmost digit is called as the MSB(most significant bit ).
  • The rightmost digit is called as the LSB(least significant bit).  

2. Binary number system

  • Any electronic device does not operate on Decimal number system and hencethe binary number system has gained importance specially in the electronics and computer systems.
  • A binary uses only two digits '0' & '1' respectively.
  • The binary digits(0 & 1)are also known as bits.Thus binary system is a two bit system.

  • Above is an example how to interpret a binary number in terms of our basic decimal nos.

3.Octal Number System

  • In order to represent large numbers in the binary format we will need huge strings of 0's and 1's.
  • The octal system can be used for reducing the size of the large binary number.
  • Each digit in the octal system will assume 8 different values from 0 to 7. 

4.Hexadecimal Number System

  • When dealing with large values, binary numbers become too unwidely.
  • The numbers are from 0 to F in which 0 to 9 represents the number as it is.
  • After 9 ,10 is represented A,11 by B and so on till 15 by F. 
  • The largest value of a digit in the hexadecimal number higher than F will be 10.
  • The largest two digit hexadecimal number is FF which corresponds to 255 in decimal system.

NOTE  :  Each number system can be converted from one form to other.The method for converting every number system to binary and vice versa is explained in the video.


Thursday, 23 July 2015

Lathe Machine | Autocad Drawing

       Autocad is must for engineers and there's no engineer who hasn't seen a Lathe Machine.
The Lathe Machine is the oldest and most versatile machine tool used since ages in the manufacturing and processing industry. It is many times referred to as Mother of all machines. Its an extremely important machine tool in the industry, though there are automated method used for manufacturing processes yet one cannot deny the fact that Lathe Machine still remains efficient and useful in its own way. A number of processes can be carried out on the Lathe Machine like turning, parting, knurling, boring, etc..  The machine is available in different designs based on different applications and requirement of the material.

        Now leaving the Lathe Machine aside and now focusing on Autocad, basically we can say that they days of pen and pencil are over, it's the electronic age! Now there are only a few people who draft by manual means investing a lot of labour. Today the means have changed computerised drawings are preffered more than manual drawings for many reasons. Some of them are accuracy, ease of drafting, clean and good appearance, easy to edit and modify, etc.. Such features make it the need of hour for one to learn Autocad. For the same purpose we've uploaded an Autocad Drawing of Lathe Machine. Lathe Machine being a complex structure provides a great experience of CAD.

To download the autocad drawing Click Here

The drawing is in Autocad 2012 format.

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