As the world is progressing, there is a need to upgrade our product and the 8-bit microcontroller are lagging behind. As the demands are now highly computational. So the 8-bit microcontrollers are lagging. But if you do not have high computational work then these controllers are just what needed. They are built upon so many years of trials and error. There is very little chance that if something is designed properly and working in your lab, that it will work in the external world.
Almost all the manufacturers make these controllers. The price range varies from low cost to high cost.
Atmel(now Microchip) atmega16/16a/32/32a microcontroller is small low cost and low power yet it is sufficient for beginners. They have wide support on the internet.
Well there are a lot of catch with these microcontrollers. Different version of same microcontroller some time differs in functionality. So always check the date code with these microcontrollers.
What I like about these microcontrollers is the fact that they are dirt cheap. And you can easily work with them as if you forget the current limits they will but there are plenty available at affordable rate.
Most 8-bit microcontroller are pretty rugged they can tolerate a wide range of current, temperature and pressure.
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