What is an embedded system?

An embedded system is a computer system that is specially designed to perform specific tasks within a larger system often with real time computing constraints.
It is embedded as a part of a complete device that inculdes hardware and mechanical parts to acheive the tast of embedded system. By contrast, a general-purpose computer, such as a personal computer (PC), is designed to be flexible and to meet a wide range of end-user needs. Embedded systems control many devices in common use today. eg: Washing Machines, Micro Waves etc.

Embedded systems contain processing cores that are typically either microcontrollers or digital signal processors (DSP). The key characteristic, however, is being dedicated to handle a particular task. Since the embedded system is dedicated to specific tasks, design engineers can optimize it to reduce the size and cost of the product and increase the reliability and performance. Some embedded systems are mass-produced, benefiting from economies of scale.

Physically, embedded systems range from portable devices such as digital watches and MP3 players, to large stationary installations like traffic lights, factory controllers, or the systems controlling nuclear power plants. Complexity varies from low, with a single microcontroller chip, to very high with multiple units, peripherals and networks mounted inside a large chassis or enclosure.

PCB (Printed Circuit Board) :
A printed circuit board commonly known as PCB plays an important role in embedded system(PCBs are also important in general computer systems). A PCB is the general circuitary of the system that involves overall functioning of the system.

How to write a bach file or a batch job?

If your are connected with world of programming, you might have heard this word " Batch File ". A batch file is used to execute a no of operations or a list of commands one after the other often requiring no user input. A no of operations are batched in a file to be executed sequentially when we run that file. In Microsoft Windows Operating system a batch file is a file saved with .bat extension while in other operating systems like Unix and Linux it can be written as a command file shell script. Batch files are often used to load programs, run multiple processes at a time, and perform common or repetitive tasks. For example, a batch job could be used to back up many files on a computer system, process log files, run a series of calculation commands, run multiple system diagnostic processes, or any number of other things that require multiple commands to be run. A big advantage of a batch job is that it can be started at any time and left alone until t...

Adding Password to Microsoft Word Document

Recovering Deleted Files, Pictures & Videos

So many times we accidently delete some important files, pictures or videos. Sometimes we loose files because of unexpected system failure ( ultimately causing system format). We can get our deleted files back using Recovery Softwares/Utilities. Even though a file was deleted there is a good chance that contents of the file are still around. When a file is deleted the contents of the file are not removed. Only a pointer to the file in the file system table is deleted. It is very important to immediately stop writing to the storage device that previously contained your files/pictures so that the old file contents are not overwritten. For example, don’t take any more pictures with your digital camera because new pictures will overwrite the deleted files. HOW TO RECOVER DELETED FILES???? Step1: You will need to use a utility to recover your lost files. I like to use a free ut...

Computer Tweaks

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