November 2009: This simple hexapod robot can walk and reverse-turn using just one motor. It can detect obstacles using the ultrasonic sensor. The programming is really simple: the robot steps forward until the Ultrasonic Sensor measures detects a nearby object, then it reverse the motor direction and a clever mechanism allows the backward-turn maneuvre, driving just one row of legs.
Here’s the latch mechanism that does the trick:
This robot is built with one NXT retail set 8547. You can download the building instructions and the program from the link that will appear below once you like this page.