To save your time to search more appropriate:

 Free Ebooks:-

http://www.flazx.com 

http://www.ebookee.com 

http://ebooksonly.blogspot.com/ 

http://downloadebookz.info/ 

Open Source Material:-

http://ocw.mit.edu/OcwWeb/web/home/home/index.htm

Electronics sites:-

http://www.epanorama.net/ 

http://www.edaboard.com/ 

http://instruct1.cit.cornell.edu/courses/ee476/FinalProjects/ 

http://www.avrfreaks.net 

http://www.avrprojects.net/

http://madan.wordpress.com/ 

Interesting Stuff:-

http://www.beyondlogic.com 

http://www.logix4u.net 

http://www.lvr.com/parport.htm 

http://www.wireless.org.au/%7ejhecker/specan/ 

http://larsenglund.blogspot.com 

Robotics:-

http://www.roboticsindia.com/

http://www.booksbybibin.blogspot.com/

http://www.micromouseinfo.com/ 

Speech Processing:-

http://www.ee.columbia.edu/~dpwe/ 

http://www.icsi.berkeley.edu/~gelbart/edu.html 

http://www.cs.toronto.edu/~roweis/thesis_defense/