Questions tagged [nxt]

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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82 views

Lego Mindstorms NXT 2.0 brick is not working

Recently, I tried to get my old NXT 2.0 brick fixed. Everything seemed to point to the clicking brick problem, but it turns out not to be the only thing, the brick was also getting hot. After ...
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412 views

Why can't I install the NXT software on macOS High Sierra?

I just got an Mindstorms EV3 for Christmas, and learned that you can have the NXT communicate with the EV3 in the NXT software. I tried to install the NXT software on my Mac, but all that happens is a ...
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1answer
64 views

Online link to the LEGO NXT firmware (v1.31) source code or IAR ARM LEGO development tools?

I am looking for the source code to latest NXT firmware (v1.31). I found the binary image is on LEGO site: https://www.lego.com/en-us/themes/mindstorms/downloads, but no links to firmware source code ...
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2answers
383 views

How to fix the 4.3V output supply of a NXT 2.0?

I have a Mindstorm NXT 2.0 from 2007 (PCB code: 62115.40H) at which the sensors except the simple "Touch sensor" are no longer working. Also the tacho-signal of the motors do no longer work. (The ...
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1answer
84 views

Where to start with a custom firmware for the NXT

In the process of hardware hacking with my NXT 2.0 I Found no easy way to connect the device as a USB storage device. Is there a specification that states how the NXT interacts over USB, or should I ...
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68 views

NXT software on Windows 10 isn't detecting NXT brick

I have the Mindstorms NXT software and brick (CPU), and I worked with them a long time ago running NXT on a Windows XP. Now, I would like to retrieve the brick to teach my son, and I installed the NXT ...
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1answer
152 views

Where's the iNXTG app for programming NXT from iPad?

I'm trying to find the old iNXTG to program NXT bricks via iPad but it is no longer available in the Apple Store. Does anyone know if there exists an archive for programs like that? The problem is ...
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64 views

Why won't my Lego Mindstorms NXT stop beeping/clicking and work properly?

I was trying to update the firmware on my NXT but suddenly the screen went blank and it started beeping. I unplugged and re-plugged my USB and a notification came up saying that the device ...
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3answers
9k views

NXT Brick will not update firmware

I'm running 6 NXT robots in an introductory class. Occasionally we've had bricks that would not accept a program and I've reset the brick by pushing the reset button under the battery pack as well ...
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1answer
444 views

PC To NXT Brick via Bluetooth

We have a fully-working java program which can connect to another computer and can send messages from this(both sides run java and we used SPP Server and Client), however when trying to connect to the ...
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1answer
97 views

Mindstorms NXT NXC RemoteStopProgram fails compilation

I have two NXT bricks connected and they work together using Bluetooth, sending messages between the two works. The master NXT will start a program on the slave NXT with the RemoteStartProgram ...
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1answer
362 views

Unable to turn on NXT. Completely Frozen [closed]

I recently downloaded a file on my NXT and when I used it, it didn't work as intended. The motors started to make sounds like they were jammed, one got stuck and now the NXT won't even turn on. I ...
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2answers
294 views

How can I program a motor to rotate towards the source of sound?

I have 3 sound sensors and a motor connected to four ports of the same brick. My motor should rotate by some angle towards the highest sound detected by the sensor, and now I'm wondering how I'm ...
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1answer
37 views

Unable to save NXT program

I pulled out my NXT recently to tinker around with it. After reconstructing one of the suggested builds, I was writing a small program for it. About halfway through, I needed to leave my work, so I ...
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1answer
1k views

How to build an automatic Lego train system?

I was wondering if anybody has ever tried using the IRLink NXT sensor to make an automated train system and if so, what kind of setup did you have to make it all work? I have been working on a train ...
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1answer
223 views

Help with Multiple Motors/Intelligent Bricks and coding/ programming/ daisy chaining

I have built the accompanying robot earlier in the week. I have a challenge where the robot needs to find white/black bricks then store them on a tray and then travel over to another robot and ...
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3answers
667 views

How to retrieve a deleted program file from the lego NXT

I have been programming a complex file for my Lego Mindstorms NXT. I accidentally deleted my file from the PC, but it is still available on my NXT brick. Is there any way that I can retrieve the file ...
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1answer
257 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 room always as my starting point(the black box). The green box is going to be my park area. Circles can be the ...
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1answer
794 views

“File error!” appears on NXT, but why?

I tried to upload this program to my NXT, but for some reason I am not able to run it properly as it is always terminated with the message File error!. No idea why. I am trying to read a .txt file ...
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847 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, I immediately get the error below: Microsoft Visual C++ runtime Runtime Error ...
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1answer
5k views

How do I get the Mindstorm EV3 software to recognize an NXT brick via Bluetooth?

I'm trying to program my NXT brick via the EV3 software over a Bluetooth connection. I can connect it via USB (although that too failed initially, but has since been resolved; not sure why) but I'd ...
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3answers
2k views

Are NXT Light sensors compatible with EV3?

I would like to use the NXT light sensors with my EV3 brick. I don't have enough light sensors as I need 2 for each robot (per set) and it only comes with one. However, I have a lot of NXT sensors. ...
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3answers
818 views

Does LEGO no longer support NXT 2.0 at all?

I am running Mac OS X 10.15 (Catalina) and the EV3 software can't detect my NXT 2.0 using USB.
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1answer
4k views

Bluetooth pairing successful in OSX but Mindstorms NXT software still can't connect

I'm using OS X Mountain Lion. I've installed the Mindstorms NXT software successfully using the NXT Script.rb script from Lego's web site, which is supposed to tweak the install so that it is ...
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2answers
122 views

Does repeated flashing cause degradation NXT

I have a Lego Mindstorms NXT 2.0, which I'm tinkering around with, writing a custom firmware for. I just want to know if repeated flashing could damage the flash memory.
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94 views

Lego Mindstorms NXT 2.0 Not turning on

I have a Lego Mindstorms NXT 2.0, which worked well for a couple of years. However, after the last few weeks, it seems to not boot up. I took it apart, and noticed it seems to have a different ...
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1answer
50 views

MindSqualls - can I connect more than one NXT brick using USB?

To access my NXT brick connected via USB with the MindSqualls library, I do the following: var brick = new McNxtBrick(NxtCommLinkType.USB, 0); The 0 is serialPortNr. If I were to buy a second NXT ...
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1answer
78 views

Can I use Microsoft Makecode to programme Lego NXT bricks?

As a teacher, I only have access to Chromebooks and I cannot (IT will not let me) use Linux on them. I'm trying to use a text-based coding language to programme NXTs. I would use ROBOTC, but I cannot ...
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1answer
529 views

LEGO EV3 on Chromebooks not recognizing NXT bricks

I teach two LEGO robotics classes in middle school and in one of my classes I am using EV3 and in the other NXT. I was able to have these classes because of the Chromebook app, but the problem I am ...
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998 views

LEGO Mindstorms EV3: Camera recommendation for line tracking

I am planning to build an autonomous car in LEGO Mindstorms that will use ultrasonic or infrared sensors for collision avoidance and in the future also a camera for line tracking. I am now wondering ...
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1answer
5k 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 ...
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1answer
2k 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 ...
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1answer
345 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 ...
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1answer
421 views

Control two Lego NXTs with an Arduino

I'm new here and also very noob with the Arduino. I have a basic knowledge in Java and some more in C# so code isn't a problem. I can learn it easily. I have a project assigned. I would like to know ...
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1answer
219 views

NXT Display is messed up

I have an NXT 1.0 and the LCD display only displays noise. Anyone know how to get one replaced or repaired?
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174 views

How could I make a golf robot from a LEGO NXT kit?

I want to make a golf robot. It will be placed straight in line with the ball. It will approach the ball and swing. The part where I get confused is how to get it to swing in a left-right motion when ...
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1answer
175 views

How to connect an NXT brick to the LEGO programmer application on an iPad?

Can you connect a NXT brick to an iPad via either USB cable or Bluetooth? For me neither seem to work even though the EV3 brick (and the LEGO programmer application) should be backwards compatible. ...
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1answer
130 views

how to send direct command to ev3 brick

I am new to ev3 python but am working on a project. I was reading about NXT-python that " It works by sending the direct commands detailed in LEGO's "Blue-tooth Development Kit" to the NXT brick" I ...
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46 views

NXT not updating, “Cannot locate NXT device to download firmware!”

I am using a Bluetooth connection trying to update firmware from 1.05 to 1.31 and it displays the message: Cannot locate NXT device to download firmware! My NXT works fine other than that. I got ...
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60 views

Where do I get PDF instructions for LEGO builds that were only in software, like NXT as of 2019?

LEGO Mindstorms NXT 2.0 (8547) stored almost all of its build instructions in the associated software. LEGO no longer supports the software for modern macOS versions. I can not find build instructions ...
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1answer
596 views

Lego Mindstorms education NXT 9797 software for a MacBook Air [duplicate]

Where can I find Mac OS compatible software for the Lego Mindstorms Education NXT Base set (9797)?
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1answer
2k 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 backwards, the first gear does not move, but the second one does. I found ...
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1answer
97 views

Rearing off to the left without telling it to

I've started to build a robot, but when it drives it veers off to the left even though I'm just telling it to go straight. I think I need to do something to the motors but I don't know what or how. I'...
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4answers
6k views

LEGO Mindstorms NXT - bossa driver prevents firmware upgrade

First of all, this may sound like a duplicate post. But, my Mindstorms NXT 2.0 has been having the "Clicking Brick Syndrome". I have been told that uninstalling the bossa driver then unplugging and ...
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1answer
92 views

Is it possible to use the Dexter WiFi Sensor with Robot C?

My wife bought me a Mindstorms NXT system a few years ago and I bought a Dexter WiFi sensor for it, by the time I got a chance to work with it, I found out the sensor had been "retired" and that the ...
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2answers
6k 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 ...
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642 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 ...
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3answers
5k views

Programming NXT color sensor with NXC?

Currently I am working Lego robot that solves 2x2x2 Rubik's cube. I am programming Lego Mindstorms NXT 2.0 color sensor in BricxCC. I already have RGB data with the command ReadSensorColorRaw. I ...
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4answers
14k views

How to program two NXT motors to run at the same time?

I'm working on a project with multiple axis of movement… trying to get two motors to run at the same time in order to achieve a mix of two!
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1answer
1k views

How can I connect the LEGO Mindstorms NXT with an iPad?

I'm looking to take advantage of the older generation LEGO Mindstorms NXT robots by developing a companion app for the iPad. I'm aware that non-jailbroken iPads cannot communicate with the robot via ...

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