A programmable robotics brick released by the LEGO company in late July 2006 and uses Technic connectors. This was preceded by the original RCX brick, and succeeded by the EV3 brick.

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3
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1answer
257 views

NXT Bluetooth “Failed!” when turning on

When I attempt to turn on my bluetooth, the response on the display after about 5 seconds is "Failed!" Then I'm sent back to the main menu. I've reset the unit and updated to latest firmware (1.31) ...
6
votes
2answers
302 views

Ultrasonic problems with the red and blue balls?

I'm still new to NXT, I try to make the robot locate a ball using the ultrasonic sensor, while there I should be in a square area marked by white color. How can I make the robot locate the object (by ...
5
votes
1answer
508 views

Best sensor for balancing inverted pendulum

I want to build a balancer for an inverted pendulum. Which of the following sensors is best suited for detecting the tilt? Accelerometer Gyroscope Angle sensor
6
votes
1answer
184 views

Is there a way to change the Lego NXT sensor polling frequency?

I am using LEGO NXT 2.0 with the native NXT flowchart-style programming environment, I would love to be able to poll the sensors more frequently. (In particular, it seems that the light sensor is ...
7
votes
1answer
337 views

Alternative controller for LEGO NXT

I love the NXT platform and have quite an investment in sensors and motors, etc. I would like to know if there are alternative controllers that have been integrated with the NXT sensors/motors. By ...
4
votes
2answers
4k views

Programming the NXT brick using an ipad app

for the past few years, I have been using netbooks to program the NXT. I would like to move into the 21st century and use ipads. Is there an ipad app for programming the NXT brick?
3
votes
1answer
247 views

Apart from the LEGO brick, is there any other hardware that has an NXT firmware written for it?

I am trying to find out if you can upload LEGO NXT byte-code to any other hardware, so I am just checking to see if anyone has ever written the LEGO firmware for any other hardware. Maybe hardware ...
4
votes
1answer
243 views

Help Installing NXT-G On Mac 10.6.x

I'm failing to install NXT-G on Mac 10.6.x. Whatever I try seems to end up with an error saying "A required file is broken" when I try to run the IDE. Could someone talk me through the steps please? ...
6
votes
1answer
230 views

Is there a documented process in 'Jamming' an NXT Ultrasonic sensor?

Just trying to gather a bit of information for a competition between a few other NXT builds, I was wondering if there was a way to make the ultrasonic sensor completely useless for the competition as ...
7
votes
1answer
392 views

How can I power an NXT motor without the NXT brick?

I know almost nothing about robotics, so I was wondering how can I power the nxt motor without using the nxt brick, and how can I send signals to it?
5
votes
1answer
441 views

Program a full rotation of a NXT motor in X seconds

I'm interested in mimicking the functionality of the Arqball Spin, at $60 it isn't cheap so I'd like to make the most out of my Mindstorms parts. I'd like to use NXT-G to program a motor to rotate ...
4
votes
1answer
2k views

Can you program an RCX using the Mindstorms NXT 2.0 software?

I was asked to teach a robotics class and found several RCX bricks in storage. Can I use these bricks with the Mindstorms NXT 2.0 software? If not, what would be the software I would need to use the ...
8
votes
1answer
861 views

Is it possible to retrive a text file from an NXT?

I am on a SeaPerch building team which is starting to use a Vernier Dissolved Oxygen probe, connected to an NXT to log the data. I have a bit of programming experience, but nothing in particular with ...
8
votes
1answer
248 views

NXC Saturation algorithm for limiting motors?

What is a good algorithm in NXC for control saturation? I want to make sure my motors don't turn past a certain angle, or they will break the model. I could do something like: if (angle > 45) ...
6
votes
0answers
196 views

PosRegEnable - How to change motor parameters?

I want to set PID parameters for a faster 'attack' when using PosRegEnablePID() on a motor. I am compiling with nbc/nxc 1.2.1 r4 mac osx fatbinary using -Z2 and -EF flags. But the compiler says: # ...
6
votes
1answer
453 views

NXT brick output ports not working properly

My NXT brick will not let motors run. When I download a program the motor will move forward and backward and then stop - sort of a wiggle. Another motor will not work at all. This happens for all ...
10
votes
3answers
4k views

How accurate is the ultrasound sensor when moving?

Can I use an ultrasound sensor while the Robot is moving, or will it give bad data?
6
votes
1answer
220 views

NXT motor power accuracy

When turning the motors, how precise is the speed parameter? I am programming in the NXC language (standard firmware) and wishing to know how many decimal points will be taken, if any, and whether the ...
8
votes
1answer
444 views

Can I use two ultrasound sensors at a time?

Is there a way to use two ultrasound sensors on a Mindstorms NXT without them interfering with each other?
6
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1answer
294 views

Is it possible to display large text on an NXT using LabVIEW?

In RoboLab and using RobotC, it's possible to write LARGE text to the screen of the NXT. In RoboLab, this can be done by just typing [\big] at the beginning of a string constant which is wired into a ...
10
votes
4answers
2k views

Can I control 2 NXT bricks from a computer using bluetooth at the same time?

I am thinking about starting a project involving controlling the movement of a mindstorms robot depending on some input from a Kinect device; however the robot will require at least 6 motors. I have ...
7
votes
1answer
1k views

Adapting charger for NXT 9798 battery

I have an old style 9798 NXT rechargeable battery pack 7.2V 1400MnAh, but no charger. Can I adapt a spare non lego 9v 200mAh charger for this? Or is voltage too high? can anyone read the output ...
5
votes
1answer
2k views

Mindstorms 2.0 can't download to NXT brick with error 142023

Using Mindstorms education 2.0 on a Windows 7 computer I can't seem to get the program to see the NXT via USB or bluetooth dongle. When connected by USB nothing appears in the NXT window with device ...
5
votes
2answers
2k views

Bluetooth will not connect Error code: -142016

nxt 2.0 Error code: -142016 The Bluetooth does connect. I am not having these issues with any of my other Bluetooth devices running off of the same dongle. Where do I find the the meaning of any ...
12
votes
1answer
1k views

What is the difference between the NXT 1.0 controller and the NXT 2.0 controller?

I've tried to look this up but I can't find anything. As far as I can tell, the controller bricks (the white ones w/ buttons and a screen) are exactly the same and the only difference is NXT 2.0 comes ...
9
votes
4answers
3k views

How to make Mindstorms respond differently, depending on which sensor is triggered?

I am new to Mindstorms (but in my day job I am a programmer). I want to make my robot do one thing if the touch sensor on port 1 is pressed, and do something different if the touch sensor on port 2 ...
18
votes
5answers
6k views

How can I use more than three motors with one NXT brick?

I'm building Caterpillar Excavator with my NXT, and at the moment I'm trying to control 4 points of motion: 2 Caterpillar Tracks - These should be controlled independently to allow for cornering, ...
8
votes
2answers
972 views

Can we program Nxt2 in C++ under Visual studio 2010?

I'd like to know if it is possible to develop C++ software for NXT2 using Visual Studio 2010 as IDE. I know there are small online projects for NXT but I can't find nothing about NXT2.... Any ...
3
votes
1answer
377 views

Can I open my old NXT program files in the new EV3 software so I don't have to rewrite the entire program?

I would like to use or convert NXT-G 2.0 programs for use with the new EV3 software. Is there an easy way to convert them besides just building them from scratch in the EV3 environment?
1
vote
1answer
278 views

What are the memory requirements of EV3-G software blocks running on NXT bricks?

The NXT brick has about 130K memory available for user programs. With the newer firmware required for downloading EV3-G programs that memory has been reduced to 118K. How much memory is used by the ...
14
votes
4answers
8k views

Will Mindstorms EV3 be backwards compatible?

LEGO Group announced the next Mindstorms version, the EV3 which will be available in the Fall, 2013. Does anyone know if the new version, specifically the controller, will be backwards compatible ...
4
votes
3answers
1k views

Interfacing Mindstorms NXT 2.0 with webcam

I very recently started playing with Mindstorms and have used the sensors that was provided along with the NXT 2.0 set. I'm planning to work on something on the lines of image processing and I need a ...
11
votes
2answers
4k views

Can I use RCX sensors and motors with the NXT brick?

I have a bunch of motors and sensors from the original Mindstorms set. It seems a shame I can't use these with the more recent NXT set. Are there any unofficial modifications that allow you to convert ...
4
votes
1answer
85 views

In LEGO mindstorms NXT programming: is it possible to download a file from a robot onto the computer?

I've lost the file for a project, but the robot still has it, and I'm wondering if it is possible to transfer the file onto my computer from the robot, and continue to work on it. How would you do ...
0
votes
2answers
78 views

LEGO Mindstorms NXT projects

I have a LEGO Mindstorms NXT set and since I bought it I almost never used it. Sometimes I think I could do something interesting with it, but I usually either feel like just copying a previous made ...
31
votes
6answers
17k views

Is there any other way to program the Lego Mindstorms NXT other than the provided software?

I'm curious to know if there is any way to program the NXT other than the provided software. I don't necessarily have any issue with the software. Does the program created by the software translate ...
2
votes
1answer
86 views

Scan objects while moving?

I'm using leJOS with an NXT robot. I want to scan the distances of objects from my robot. While rotating the Ultrasonic sensor from right to left, I would like to find out which object is closest to ...
3
votes
1answer
105 views

Finding certain positions in a room?

I have LEGO NXT and a square room of 100x100cm. I would like to use the center of the of the room always as my starting point(the black box). The green box is going to be my park area. Circles can be ...
1
vote
1answer
36 views

Is it possible to add block to the on-brick “NXT Program” menu?

I have an NXT 2.0 (8547) set. Is it possible to add some custom blocks to the NXT progranm submenu on the brick itself (like the existing "forward 5", "turn left", ...) so that I can add and use some ...
4
votes
0answers
205 views

Flash update breaks the Mindstoms NXT viewer

After udating to the lastest version of Flash on my Macbook Pro (OS X 10.7.4) The Mindstorms NXT software that comes in the box no longer displays the build instructions. It does load up, but the ...
1
vote
1answer
219 views

Programming with Lego Mindstorms EV3

I know this question was asked in the past, but I want an up-to-date answer. What is the best way to program with the NXT with a oriented object programming language? Ideally C#, C++ or Java (maybe ...
3
votes
1answer
303 views

How can I make a precise one-way clutch using Technic elements?

I need a mechanism so that if a (NXT) motor rotates forward, it moves one gear, but the other stays still, but if it rotates backward, the first gear does not move, but the second one does. I found ...
0
votes
0answers
54 views

Parallel Direct Commands to an NXT

Is it possible to send multiple Direct Commands to an NXT brick in a quick succession, and the NXT brick will execute them as soon as it receives them which will look like they are happening in ...
2
votes
1answer
229 views

How to use two NXT bricks for 3+ motors and 4+ sensors?

I need to use multiple bricks in order to use more motors and sensors. I need to read sensor values, and tell motors to move. I've tried using bluetooth, however my attempts haven't been very ...
12
votes
2answers
6k views

NXT screen either flickering or blank, what do I do?

The screen on my LEGO MINDSTORMS NXT brick has just stopped working. It is either flickering, or blank. I have tried turning it on and off, installed fresh batteries, and I can even hear the selection ...
2
votes
0answers
145 views

LEGO turing machine using Rascal

I followed the instructions on LEGO Turing Machine and succeeded to build it. Next I've tried and failed to program it using NXT Mindstorm GUI. The site mentions a Rascal framework, but it doesn't ...
3
votes
2answers
844 views

Unable to connect to NXT using NeXTTool via USB cable

For reasons beyond me, the NXC program MotorControl22.rxe in my NXT has disapeared. So i thought I'd just download it from my computer over to the NXT using NeXTTool. This is where the trouble ...
4
votes
3answers
5k views

Lego Mindstorms NXT software error

I have installed the retail version of the NXT software. Due to pitiful performance on my Mac (OSX 10.7 Lion) I followed guidance on other forums and uninstalled Flash 11 and reinstalled 10. Now ...
5
votes
2answers
3k views

Compatibility EV3 software with NXT brick - known limits?

Lego says I can I use the new software to program old NXT bricks: Q: Is EV3 backwards compatible with NXT hardware? A: Yes. You can program your NXT intelligent brick using the new EV3 ...
0
votes
0answers
232 views

NXT software V2.1 runtime installation error in windows

My system configuration : Windows 7 Home Premium 64-bit Service Pack 1. When I try to install NXT software v2.1, at the beginning itself I am getting the error below: Microsoft Visual C++ runtime ...