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An embedded system is a
combination of software and hardware. It is strictly application specific in
nature. It comprises of a microprocessor (MPU) with memory or a microcontroller
(MCU)(brain of embedded system) in which a program is burnt in its flash memory to serve a particular task. This microcontroller
is programmed according to the user’s requirement and can be used in so many
situations like designing of simple larms, alerts, and lightings in home automation systems. Also there is a feature of rewriting the program, as the program
feed earlier can be erased and a new program can be burnt in the MCU. An embedded system
also uses some sensors which are technically the transducers. These transducers
can sense the signal or information and send to MCU and then MCU decides what
to do. Embedded system uses motors,
actuators, lcds, leds, switches, pcbs etc. There are several examples of
embedded systems as given above. From digital clock to your own laptop, all we use is
embedded systems. Motors are used to give motion to our embedded system i.e, a mobile embedded system can be created using a set of motors. A motor sensor assembly can be used to calculate the rpm count of the motor. LCDs and LEDs are used to display important information which plays an important role in interaction which provides our embedded system a user friendly environment. Switches or push buttons are used to work with or to command the embedded system. All these push buttons, microcontroller, lcds, leds are assembled, and connected on a printed circuit board to give the final embedded system.
This is a simple brief intro about
embedded systems.
