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13/01/2022

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25/03/2020

hardware

10/11/2019

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26/10/2019

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24/10/2019

Masterntechnician

21/09/2019

14/08/2019

Basics of Computers

Being a modern-day kid you must have used, seen, or read about computers. This is because they are an integral part of our everyday existence. Be it school, banks, shops, railway stations, hospital or your own home, computers are present everywhere, making our work easier and faster for us. As they are such integral parts of our lives, we must know what they are and how they function. Let us start with defining the term computer formally.

The literal meaning of computer is a device that can calculate. However, modern computers can do a lot more than calculate. Computer is an electronic device that receives input, stores or processes the input as per user instructions and provides output in desired format.

Input-Process-Output Model

Computer input is called data and the output obtained after processing it, based on user’s instructions is called information. Raw facts and figures which can be processed using arithmetic and logical operations to obtain information are called data.



The processes that can be applied to data are of two types −

Arithmetic operations − Examples include calculations like addition, subtraction, differentials, square root, etc.

Logical operations − Examples include comparison operations like greater than, less than, equal to, opposite, etc.

The corresponding figure for an actual computer looks something like this −



The basic parts of a computer are as follows −

Input Unit − Devices like keyboard and mouse that are used to input data and instructions to the computer are called input unit.

Output Unit − Devices like printer and visual display unit that are used to provide information to the user in desired format are called output unit.

Control Unit − As the name suggests, this unit controls all the functions of the computer. All devices or parts of computer interact through the control unit.

Arithmetic Logic Unit − This is the brain of the computer where all arithmetic operations and logical operations tak

14/08/2019

Parts Of A Mobile Phone

A mobile phone has several parts or components. It is important for you to know the parts and understand their functions so that you can easily diagnose and solve problems. How many parts of a mobile phone do you know?

A conventional mobile phone is made up of many parts. Table 2 below explains the functions of the main parts.



Figure 5 below shows a printed circuit board (PCB) of a mobile phone showing the different internal parts. As you can see from this diagram the PCB is divided into two parts, the network section and the power section. The network section controls the incoming and outgoing phone calls, while the power section controls the memory and power related functions of the phone.

We hope you now know the different parts of a mobile phone and their functions. Make sure that you learn them well and are be able to locate them easily before you move on to the next section. Let us now look at the tools that you need to repair mobile phones.

14/08/2019