Building Lego NXT according to your imagination is lots of fun, but figuring out some really cool stuff is not easy. I was wondering whether there are some ways to automatically design Lego robots ...

“Memo” is the program which will save light intensity value and compare the current light intensity with the saved one to make decisions about what to do next. The program is here. When I progra...

In this version, I added the function to use the ultrasonic sensor to detect approaching objects and let the NXT avoid them. It works, though there are still some “bugs,” partly because of the limi...

After spending some hours getting more familiar with the functions of NXT-G blocks, I simplified the algorithm. The new version can be downloaded here. I also created a more simplified version i...

The first scheme I used is to let the robot do a random walk and stop when the light is stronger than a threshold. I use the software NXT-G, which comes with the Lego NXT 8527 package, to program ...