Paul Klop

Blog about Lego and more

Category: NXT

The Lego Mindstorms NXT creations I made

Lego NXT Axle Sorter

Hi everyone!


After sorting out your Lego’s you’re left with a huge pile of axles… I made a solution for that problem ๐Ÿ˜€

Here’s the Lego NXT Axle Sorter


Put you’re axles into the loading container and the robot does the work for you


Here are some photos if you’re interested in the design. It’s not much but with a little help of the video you can make something similar I guess.. Otherwise, please leave a comment ๐Ÿ˜‰


This thing I used to dispense only one axle at the time into the machine;



NXT Programs:ย Lego NXT Axle Sorter

If you have any questions, please let me know!




Lego NXT Medi (Medicine Assistant)

A8090139b - kopie

MEDI is a prototype of a robot which helps people to take the correct amount
of medicines at the right moments. It's called MEDI because Medi
is a friendly maiden name and the robot must be friendly to the users.
The android app is made with:
For more information: See the photos

01_Cartoon Medi503_Conveyor MEDI2 04_Units MEDI3 05_Lego NXT Medi Stroomdiagram3


MA app (Carriage Return problem)

Today I spend the whole morning to make an app for the Lego Medical Assistance, I’m building. The app must send a file to the robot which the robot can read. The file from the robot needs a Carriage Return (Enter) and Line Feed.

CRLF NXTย The NXT only reads numbers which are divided by a Carriage Return and Line Feed.


The problem was that Appinventor ( don’t place a Carriage Return. It places only the Line Feed between two lines when you type in ”/n” (for Line Feed).

LF NXTAppinvenor only place Line Feed.


So I tried it a differend way. I make a list called Medicines and tried to save that. And it worked! But the only problem was that it now placed ” around the numbers.

CRLF NXT2It now placed ” around the numbers. But the problem with the Carriage Return is solved.


The NXT doesn’t read the ”. So that was another problem. My mother found a solution on the Internet. You must use a replace element for the text in Appinventor. You fill in the file and what you want to replace. I wanted to replace the ” for nothing so at the ”replacement” I place a textbox with noting. And now I have a file which the NXT can read ๐Ÿ˜€ .


Lego NXT Mind Game (Master Mind)

This Lego NXT Robot plays the game Master Mind with you. You try (in 5 times) to guess the colorcode and then you win the game. On the screen you can see the colors what you have guessed the five times: R=red B=blue Y=yellow G=green. At the right side of the line is a number. The number is the score how many balls are in the right place. 

Lego NXT Race Timer

Race Timer from Lego Mindstorms

Edit (19-12-2019): The NXT files are available. You can download them here. In the .zip folder are two files. You need to place this folder in the profile folder you want. Most likely, you can find your profile folder in your “Documents” -> “LEGO Creations” -> “MINDSTORMS Projects” -> “Profiles” folder.

Please let my know if you have any questions ๐Ÿ™‚

Lego Easter Egg Machine V2

Because the first Easter Egg Machine was a great succes I made a new one. 

Lego Easter Egg Machine

This is my first Lego NXT machine on YouTube. 

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