Yes, you can do B.Ed after B.Tech. for admission in the B. ed course the applicant should have completed graduation with good academic record, and you have completed the graduation. Following are some good colleges where you can apply for the b. Ed:

K.J. Somaiya Comprehensive College of Education, Training and Research, Mumbai
Bombay Teacher's Training College, Mumbai
Lady Irwin College, Delhi
Andhra University, Visakhapatanam
SNDT Womens University, Mumbai
Government College of Education, Chandigarh
St. Xaviers College of Education, Patna
D.M.College of Teacher Education, Imphal
Kirorimal College of Education, Bhiwani
Jamila Milia Islamia University, Delhi
University of Punjab
University of Pune
Himachal Pradesh University, Department Of Education, Shimla
University of Bombay