Tushar Vaidya, I have done this several months ago by MCU. AND IT WORKS! But i donot want to use any MCU or ICs. my problem is that,
1, i have very small space for this part, roughly 1 to 2 cm square.
2, There is no power supply available for current above 1mA (size will increase).
3, I am seeking Low cost solution of this problem.
I am expecting a circuit made up of R,C,diac,SCR,diodes etc.

THANKS!