Random Light Finder v3

In this version I add the function to use the ultrasonic sensor to detect approaching objects and let the NXT to avoid it. It works, though there are still some "bugs" partly because the limitation of the sensor (Can't detect object which doesn't reflect ultrasonic wave well and can't detect if the object is too close).

Flowing are the photos to show how to build the Random Light Finder v3 and the setup up.

Not that the facing direction (look up/down) of the ultrasonic sensor can be controlled by Motor B. I don't alter the direction in this version, but I will probably explore the possibility in the future version.

The program  can be downloaded here.