Here is a pretty cool project that Sascha from Germany Sent me.

Here is the information from Sascha:

“This is the Lego NXT “4 In A Row” robot project.
This robot is able to play against you on itself.
He is independend of any computer, so the program - programmed with NXC - is running on the NXT brick.
The human player can choose the row while pushing the touch sensor as often as the row’s number. The computer decides on its own, which row would be the best for it.
This KI is working mainly on the MINIMAX algorithm. However the computer is not as hard as i want him to be, because of the less NXT Brick speed.
the algorithm works like that: The computer simulates the next 3 possible steps and gives any game situation a specific number of points. The Row with the most points will be the next computers choice.
The robot uses three NXT motors:
- one is moving the gameboard
- the second fixes the stones
- the third opens the gate”

Here is a great robot that my best friend Ben made, called the Netch-a-sketch. Well actually it’s the program that’s cool. As you may have guessed from the name, it is an NXT based etch-a-sketch. If you want to see it in action, download the program(Right Click and Save as to Download) I’d have included a video, but unfortunately you can’t take Screencasts with the NXT

Here is a really good example of what you could do with one NXT Retail Set and no other parts or sensors needed. A Rubik’s Cube solver!!! It uses just the retail kit. It seems like a simple design but would be a complex program. The following is some specks on it:

• Scanning the cube: 1 minute
• Calculating a solution: 20 - 40 seconds
• Executing the moves: 1 - 5 minutes. Average 4.5 minutes (60 faceturns)
• Average total time: 6 minutes

Here is his website and a video of it in action.

http://tiltedtwister.com/index.html

(Edit) The Maker has added the LDD File and Program files on his site, so head on over there and build one for yourself.