Lecture videos,audios,notes and presentation slides from MIT

MIT OpenCourseWare | Free Online Course Materials

ocw.mit.edu/

Microcontroller Based projects"An open source platform for electronics projects"

Click here 

      adafruit.com

Aptitude Training videos for Competitive Exams

To download videos click here

Aptitude Training videos for Competitive Exams

To Download videos click here

Aptitude lecture videos for Competitive Exams

To Download Videos click here

RTOS PPT

To Download Click Here

Arduino " an open-source electronics platform"

 www.arduino.cc
Arduino is an open-source electronics platform based on easy-to-use hardware and software. It's intended for anyone making interactive projects
  

Engineering lecture videos from IIT's

http://nptel.ac.in

MOS transistor basics