Lego Nxt Scorpion Program

The NXT 2.0 installation menu will launch. Simply select your preferred language and follow the on-screen instructions. To start the program, select “LEGO Mindstorms NXT” from your Applications and click Mindstorms NXT. The first time you start the program it may take a couple of minutes to get ready.

You know the popular nxt robot – the scorpion. Today I'm going to show you how to program it. The program looks like this. First the robot goes until it sees an object less than 15 cm away. Then it strikes the object until it hits it using the touch sensor.

This procedure is repeated and repeated again. First we need a move block. Set it to unlimited, until the robot sees an object less than 15 cm away. Then it stops. Now, we need another move block for motor A going forward unlimited, until the spike touches the object. Now, the question is how to return the spike back.

This would be using the rotation sensor. First we need to take the rotation sensor and reset its' value, before motor A makes any movement. Then we take the rotation sensor, read how many degrees has it rotated and move motor A backward the same amount of degrees as it rotated forward. This we repeat again and again. We want to repeat this until the enter button of the brick is pressed. If we change the condition of the loop to the enter button is pressed. The program will not work.

That's because the condition is checked just before the program enter the loop. So if we press the enter button while we are on the first block for instance, it would not detect it.

That's why we will set the loop to forever and parallel to this we will put a wait block with condition the nxt enter button and then we put a stop block to terminate the program. So our program looks like this. Now, I would like to add another feature to the program. Let's make the robot display how many times it has stroked. So we take a variable, this time we will use the given variable for number. We initialize it with zero, because firstly the robot has not stroked anything.

After each strike we will increase that value with one. Now, instead of the wait block, we will put a loop with the same condition. In it we will visualize the value of the variable. So take the variable, number to text block and a display block. We set it to text and connect the blocks.

Let's now download the program to the brick and test it. One more thing. Under this video in the materials you can find the program of the scorpion with some explanation on it. It look like this.

With the help from the Mindstorms Community Partners (MCP), LEGO has released for the NXT 2.0 set. However, they are not easily found on the LEGO website.

This page is a collection of pictures and links to the bonus projects. Robot Square does not host the instructions or programs. Credits (and questions) go to the original designers. Requirements: All you need is one NXT 2.0 set Asking for help: If you have any issues with the building or programming instructions, please contact the original designer of this robot!

Asking for help here isn’t very effective, because I did not design these robots. Therefore, I do not know the details of the designs or solutions to problems you may run into. I’m just keeping this collection here to make all these designs easy to find.

Happy building! 1# M.O.R.P.H M.O.R.P.H • Designed by: Kirk Backstrom • • • 2# Llama Llama • Designed by: Fay Rhodes • • • Programming instructions are in the same document as the building plans. 3# Manty Manty • Designed by: Laurens Valk • • • 4# Stonehenge Stonehenge • Designed by: Philippe Hurbain • • • • 5# Segway with Rider Segway with Rider • Designed by: Dave Parker • • • • 6# NXTitzki NXTitzki • Designed by: Matthias Paul Scholz • • • 7# Archfish Archerfish • Designed by: Fay Rhodes • • • Programming instructions are in the same document as the building plans. 8# Tripod Tripod • Designed by: Daniele Benedettelli • • • 9# MindCuber MindCuber • Designed by: David Gilday • • • • 10# Pinball Pinball Machine • Designed by: Rob Torok • • 11# Color Programmable Car CPC: Color Programmable Car • Designed by: • () • • 12# Lotto Bot Lotto Bot • Designed by: • • (Commented by Robot Square reader Foton) Videos Here’s a few videos showing some of the bonus models in action, so you can see what the robots do before you build them.

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