Digital electronics

• http://freevideolectures.com/Course/2310/Digital-Circuits-and-Systems#
• http://freevideolectures.com/Course/2312/Basic-Electronics
• http://freevideolectures.com/Subject/Electronics
• http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-002-circuits-and-electronics-spring-2007/video-lectures/
• http://www.academicearth.org/courses/circuits-and-electronics
• http://www.academicearth.org/courses/principles-of-digital-communication-ii
• http://www.youtube.com/watch?v=w8Dq8blTmSA
• http://www.youtube.com/watch?v=w8Dq8blTmSA
• http://nptel.iitm.ac.in