Problem using infrared sensors

Our project is to make a line following robot in it sensors are used to determine the the path we set for it to follow.
Sir I asked u about the fixing of ir sensors into our circuit which has to determine a path to follow.We are making a line following robot and we r done with everything else except the use of sensors which is on of the major part of our project.
What I need from u is that what circuit we should make or how to make sensors work according to our project.
Today we made a circuit for it available on the website I wrote to u in the previous message and what it is doing is that it only drops 0.02 volts thats why it is very difficult to check that.For that we have to use a comparator and again there is a problem to determine the work of comparator.
I expect a simple solution from u people.
Thankyou verymuch

Take a look at this

http://www.wrighthobbies.net/bots/mini/mini.htm

alternately post your schematic so people can see what you have done and help

That is a cool project for beginners. May I ask if this is a school project?

I am interested in PIC/AVR code of your project.