http://stefanfrings.de/mikrocontroller_buch/index.html
https://www.elektronik-labor.de/AVR/KursAssembler/T13asm13.html
http://www.gsc-elektronic.net/mikroelektronik/index.html
https://www.mikrocontroller.net/articles/AVR-Tutorial
http://www.avr-asm-tutorial.net/avr_de/index.html
https://dronebotworkshop.com
https://www.youtube.com/c/Dronebotworkshop1/videos
https://www.youtube.com/c/HobbyelektronikerCh/videos
https://www.youtube.com/c/Dronebotworkshop1/videos
https://www.youtube.com/channel/UCXNr5itLlJ6aWltWPcK7vyQ/videos
https://www.youtube.com/c/Attractor1/videos
https://www.youtube.com/c/eHaJo/videos