Recommended · for beginners
NewbieHack - Microcontroller Tutorial - A Beginners Guide
Why people recommend it
A long-standing starter course on AVR microcontrollers that people credit with teaching the hardware basics and how to work from the datasheet.
Watch for: Older tooling, as AVR Studio has since been superseded
In their words
I've been looking at tutorials from Patrick Hood-Daniel on Youtube.
josef.van.niekerk on electronics.stackexchange.com, Jan 2013. CC BY-SA.