Light following robot

[ltmhall]

I need a circuit for my robot that will be able to move towards a light at the same time be able
to avoid obstacles in its path. I want to use three photo resistors, so I can have a 90 degree
angle. Does any one have a schematic or an I deal how I can do this.

[Admin]

does this photoresistor object avoidance algorithm help?
http://www.societyofrobots.com/programming_photoresistor.shtml#object_avoidance

photoresistor schematics:
http://www.societyofrobots.com/schematics_photoresistor.shtml