Question

Your designing a temperature controller that has a digital thermometer that outputs   temperature (room temperature ranges between 55~99 degree) with  an accuracy of 1/10th of a degree.  You need to choose microcontrollers with 4, 8, 16, and  32 bit word  sizes. Which is the most appropriate and lowest cost? Higher word size microcontrollers are more expensive.  

Answer 1

Actually higher word size microcontrollers are more expensive because they perform largely instructions at once and support higher precision results and high calculations. Since the above project needs an accuracy of 1/10th.So we should go for a less bit microcontroller which will get for less cost and suitable for a single application. If you want to try different projects with a single controller you should go for a higher bit, they can be used for both small and large projects and you need not required to buy another controller for another application. For the above-mentioned application, you need to choose a 16-bit controller which supports up to 65536 possibilities