NPTEL course link (8051): https://nptel.ac.in/courses/108105102
NPTEL course link (AVR MC): https://nptel.ac.in/courses/106105193
AVR Programming tutorial: https://microcontrollerslab.com/avr-microcontroller-tutorials/
8051 Assembly Programming Tutorial: https://www.youtube.com/watch?v=g7Gypl9zNz8