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Questions tagged [nxt]

NXT is the latest installation in the [Mindstorms](https://robotics.stackexchange.com/tags/mindstorms) line launched by LEGO. The NXT includes many improvements over the old RXC line, including a smarter 'NXT Brick', powerful sensors, and an easy-to-use graphical programming language.

2
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2answers
152 views

Monobrick Communication Library-reading nxt sensors

In my program, I'm need to detect if the NXT touch sensor is pressed. ...
0
votes
1answer
210 views

“Thermal Imaging” with Arduino and/or Lego Mindstorm NXT 2.0?

I'm trying to build a robot that can be sent into rooms/buildings and detect people using nxt and/or Arduino. In addition to this I would like to be able to view what my robot is "seeing" in real-time ...
1
vote
0answers
25 views

Does anyone have a working example of using Qt to communicate with NXT?

I'm stumped. I've been looking through all of the Qt classes and I'm so completely and utterly lost. There are only three examples of bluetooth use in Qt, but none of them work for me. I just need a ...
3
votes
1answer
227 views

Can I use QT to communicate with a Lego NXT robot?

QT has native bluetooth support, but can it be used to communicate with the Lego NXT robot?
3
votes
1answer
164 views

Performance/memory considerations for pathfinding lookup tables on RobotC for a small set of paths

I'm writing a C code generator geared toward RobotC and complex tasks for an FTC team, and was wondering about some performance and storage concerns: How much memory is available for my program's ...
3
votes
2answers
365 views

NXT Segway problem. Need advice/help

I'm attempting to build a segway robot using a gyrosensor and accelerometer. I'm having trouble getting the robot to remain standing, for some reason, and I can't identify the problem. Here's what I ...
1
vote
1answer
61 views

Just run program on NXT, not download?

Is there any way I can simply run a program on the NXT, but not download it? I have all my programs already downloaded, and I am connecting with a USB cable to a MacBook Pro using the NXT-G interface....
5
votes
1answer
361 views

Powering down servos completely in RobotC+Tetrix

For a certain robotic application (actually for the FTC challenge this year) our team is performing an operation where a servo-driven arm could potentially be forced into an unknown position. We are ...
3
votes
1answer
61 views

Mindsensor Motor Multiplexer jump on run_unlimited

I am trying to run a nxt motor using the mindsensors motor multiplexer at a slow speed. When I turn it on, it tends to jump approx 20 to 40 degrees before moving at a slow speed. Has anyone seen ...
2
votes
1answer
89 views

Does anyone know what might be giving me this error coming from an i2c device

Here is the background. I am trying to write a service for the HiTechnic prototype board. Using the Appendix 2 from the blue tooth developers kit from Lego's site I am able to understand what is ...
2
votes
1answer
370 views

How do I interpret this data, received by the I2C controller on an NXT 2 brick?

I have been trying to write code to connect a HiTechnic prototype board to my lego brick. Although I am using MSRDS studio, that isn't the issue; reading and writing to the serial port that the device ...
3
votes
2answers
1k views

PID line follow with three sensors in Not eXactly C

I'm currently working on a line-following robot which uses three sensors to follow a black line. The sensors are pretty much in line and right next to each other. Right now, I'm doing a simple line ...
2
votes
2answers
85 views

Check if task exists in Not eXactly C

Is there a way to check if a task, function or variable exists in Not eXactly C? I know that in PHP you can use isset() to check if a variable exists and ...
7
votes
1answer
555 views

What are the notable limitations on using Java with Mindstorms NXT 2.0?

I'm a long time Java developer who is starting to learn on the Lego Mindstorms NXT 2.0. Are there any limitations to using the Java API? Which language is the most robust on the platform? I found a ...
14
votes
1answer
954 views

Will turning an NXT motor by hand damage it?

I have heard a lot of claims that manually turning an NXT motor by hand can potentially damage it. I was wondering whether this was at least partially true, and whether there is any evidence to ...
6
votes
3answers
816 views

Which programming language should I use with the NXT? [closed]

We have an optional course in our high-school which is about robotics. We're using the Lego Mindstorms NXT and program it with the original Mindstorms-software. However, we want to advance and use a ...
5
votes
5answers
10k views

More powerful alternatives to Lego Mindstorm NXT 2.0? [closed]

I'm interested to build Robot from my imagination, and I was looking to purchase a robotic kit. I find the Lego Mindstorm NXT 2.0 really interesting for many reasons : You can plug whatever brick you ...
8
votes
1answer
870 views

Properly flashing the firmware on a Lego Mindstorms NXT

I am attempting to upload a custom firmware to a Lego Mindstorms NXT and am having issues. First of all, I'm attempting to use nxtOSEK, which would let me run C++ programs on it. The problem is, ...