Embedded System

Embedded System is nothing but combine of software and hardware, it contain processing cores that are either micro controllers, or digital signal processors
An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system for example JCB., A processor is an important unit in the embedded system hardware but the heart is embedded system. The embedded systems range from portable devices such as digital watches and MP 3 players, to large stationary installations like traffic lights, factory controllers, and largely complex systems like hybrid vehicles, MRI, and avionics. Complexity varies from low, with a single micro controller chip, to very high with multiple units, peripherals and networks mounted inside a large chassis or enclosure.
The Embedded System work based on the Micro controller chip, the chip store the program of what we feed it as per Micro controller is run the program we feed in it.Embedded systems are commonly found in consumer, cooking, industrial, automotive, medical, commercial and military applications, also used in transportation, fire safety, safety and security, medical applications and life critical systems, as these systems can be isolated from hacking. Embedded systems are designed to do some specific task, rather than be a general-purpose computer for multiple tasks. Some also have real-time performance constraints that must be met, for reasons such as safety and usability; others may have low or no performance requirements, allowing the system hardware.
Embedded systems often reside in machines that are expected to run continuously for years without errors, and in some cases recover by themselves if an error occurs. Therefore the software is usually developed and tested more carefully than that for personal computers, and unreliable mechanical moving parts such as disk drives, switches or buttons are avoided.

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