Explorer

This is the Explorer, featuring a rotating ultrasonic sensor, and bumper at the front. This robot's mission is to explore all around your room, house, or wherever you set it loose.  It tries to "see" walls and other obstacles before running into them, and then turns its head to look left and right to determine which direction looks the best to turn.  In case it does accidentally run into something, the bumper in the front triggers a touch sensor to make the robot stop and then decide which way to turn.
Designed For: Mindstorms NXT 2.0 Retail Kit

Difficulty

Building: 
Programming: 

Download instructions

Once again, I do not own this, I am just sharing it.