At 64 years of age I am finally building my own robot! The first robot I saw was Mr Robotham at the Schoolboys Own Exhibition in 1955! (Google images will find it for you.)
I am using a Sharp IR Analog Sensor (2 different ones, in fact) and the readings I'm getting on both are not 'correct'. I'm using a PICAXE 28 & a Sharp GP2D120XJ00F or GP2Y0A21YK.