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Atmel AVR microcontrollers are a major player in hobby electronics.
They are great for prototyping because:
All AVR chips can be divided into 4 main groups. Only 2 are available in DIP formats.
Tiny's are the low-cost branch of the AVR family.
Mega's are the most popular AVR family with hobbyists. Most Arduino model are powered with an ATmega.
The xMEGA is somewhat newer family that has not yet made a huge impact in the hobbyist embedded electronics world.
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