An embedded system is quite simply a device that has a computer system inside it. It is a combination of hardware and software that is designed to do a specific function or functions. , You can think of an embedded system as a controller which is part of a larger design. Embedded systems control many devices or certain parts of devices that are in common use today., How would your washing machine know what temperature to heat the water and what speed to spin the washing? , A washing machine if it was built sometime in the last 20 years it will have a computer inside it so that would be an embedded system. , The embedded system is a simple computer that only performs specified operations to enable a washing machine (digital device) to work., Does it go beep ? One big clue just in general for embedded systems is that if you're pressing buttons and it goes beep then that is usually a good clue that is almost certainly an embedded system., An example of something in the kitchen that might have an embedded system in it is a dishwasher. , When I set up my dishwasher cycle I press a few buttons on it that go deep, it definitely beeps at me when it starts and it also beeps at me when it's finished. , So that is a good example of an embedded system that's definitely found in the kitchen., An example of something in the lounge that might have an embedded system in it is a TV. , Certainly a smart TV would be, although there are some very old TVs which might not have a computer system inside of them., Smart TVs connect to a network, they are really much more of a computer than they are a TV’s they definitely are an embedded system., Bluetooth speakers or smart speakers are another example of an embedded system, as well as things like the Amazon echo and alexa are all speakers with a computer inside., An optical mouse is an example of an embedded system, the optical mouse takes pictures of the surface while the user moves the mouse. , It stores the pictures in memory and compares them to determine (x,y) coordinate axes locations which are outputted to the general process computer so that you see the mouse move on the screen., Summing up, embedded systems control aeroplanes, medical devices, and many household devices including cameras and cars. , Common misconceptions about what probably aren't embedded systems around your house are a toaster toast doesn't actually have a computer inside it. , Vacuum cleaners like toasters aren't embedded systems. And finally fridges as well as freezers only have a motor and a little bit of electronics., So fridges and freezers are not embedded systems, but there are exceptions as we now have smart fridges which are embedded systems. , Remember embedded systems are used for specialised tasks., Laptops and general-purpose CPU’s are not considered to be embedded computers for several reasons. , First, the word “embedded” implies that the computer must be contained in a larger mechanical or electronic system. The word “computer” is typically thought of as a computer that stands on its own., Second, while an embedded computer is designed to perform a specific task, a laptop is capable of running and downloading various programs, software, and computations simultaneously. , So, a computer is not called an embedded system , but instead it is called a general purpose computer. , It is multifunctional, you can run different software on it and create different software on it and this is why it is not an embedded system.,

1.1.3 Embedded systems unjumble

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