Mr Karas
i am sorry for i acting in a haste while thinking of cutting the primary .. what i should have written is that i should cut the input to the Regulator ...

and Mr. Eric that was really very nicely put ...
"""But i dont want to use an OP-AMP for it
"please let me tie your hands behind your back before you help me" """

i wished not to use the OP-AMP as i wished to keep the cost to a bare minimum ....

i always look forward to all your comments and suggestions and i love the way everyone out here is ready to help each other

thanks again ...
can somebody list all possible ways to do this task and can be compiled as a tutorial ....

regards
nitin