Please use this tag only for general Mindstorms questions and compatibility. If the question refers specifically to the EV3, NXT, or RCX, then use those tags instead.

learn more… | top users | synonyms

18
votes
7answers
6k views

Can you program Lego Mindstorms with the Scratch programming language?

My child is learning programming using Scratch in school. Can she program her Mindstorms using Scratch?
7
votes
1answer
220 views

How can I control nxt 2.0 robot with a Wiimote in labview?

I am building a robot with Labview for LEGO Mindstorms and I have wanted to hook up the robot to move based on a Wiimote or Wii remote. However, I have not found a file to download to enable me to do ...
6
votes
2answers
20k views

Lego Mindstorms RCX RIS 2.0 IR tower Windows 7 / Windows XP driver

So I've recently dug up my old Lego Mindstorms RIS 2.0 (RCX) and have spent the past few days trying to install it into my Windows 7 laptop. It worked fine, except it could not find the correct ...
3
votes
1answer
247 views

NXT shuts down in 5 minutes

I have an NXT brick that will always shut down after 5 minutes. No, it is not the sleep timer. Documentation from the NXT Hardware SDK, page 17, states that if the ARM7 processor does not send back ...
5
votes
5answers
4k views

Direct control of EV3

I need to control a car with an EV3 brick. I want to control it remotely. The trouble is, I'm using an education set so I don't have the remote. What means of controlling it remotely could I use? I ...
4
votes
1answer
41 views

What files are required to run an ev3 program?

I'm working on a project that aims to help beginning Lego Mindstorms programmers. I'm developing certain "modules" (moving straight, making a turn) for students to try, and I want to develop a program ...
0
votes
1answer
87 views

Mindstorms brick has a dim display

The LCD display on my Mindstorms brick (microprocessor) is very dim. It is not just a low battery; I've plugged it into an AC adapter. Anybody encounter this problem? I will post a picture of the ...
1
vote
1answer
277 views

Clicking Brick Syndrome after using Raspberry Pi

I have a Mindstorms NXT brick, and when switching it on recently, it just started clicking. I have tried many different ways to fix it, but nothing has worked. I've done a soft reset, hard reset (...
5
votes
2answers
138 views

Lego NXT Exploitation or Vulnerabilities?

I originally posted this question on the Reverse Engineering site, but there were no answers. They told me to also post this question here. OK, my friends and I have Lego NXT sumo bot competitions for ...
1
vote
2answers
412 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 ...
7
votes
3answers
2k views

Programming Mindstorms on a chromebook

I know there is no official way to program NXT/EV3 on a Chromebook. But a Chromebook can have Ubuntu installed via Crouton in developer mode. So, is there a relatively painless way to program NXT/...
1
vote
0answers
63 views

Does LEGO still exchange the Mindstorms NXT bricks with flicker problems?

I'm new here. Does LEGO still exchange the Mindstorms NXT bricks with flicker problems? If not, does anyone know of someone willing to try and fix them for a fee or barter? Many thanks in advance!
0
votes
2answers
26 views

Is there a way to use bluetooth to show something on an nxt screen?

i'm planning to use nxt to troll my friends, and I want to show something on the screen that I send to it via bluetooth. To clarify, I want to type it on a computer in another room. Is there a way to ...
7
votes
1answer
3k views

Virtual LEGO / Technics / Mindstorms simulation environments

I know that there are quite a few LEGO CADs floating around, but are there any physically correct simulation environments for models built with LEGO / Technic / Mindstorms parts, that would, for ...
7
votes
3answers
4k 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!
6
votes
1answer
648 views

Pass sensor or motor port number as a parameter

I want to create a block for one light sensor or one motor separately. Is it possible to give the number of the port as a parameter to a sensor or motor block via data wire? In NXT-G it was possible.
4
votes
5answers
3k views

Does the Mindstorms EV3 software run on OS X El Capitan?

El Capitan was released a few days ago, and I want to upgrade. Will there be issues with the software, or will it run nicely on El Capitan? My Mac: Retina MacBook Pro 13", Early 2015
0
votes
1answer
71 views

Lego Mindstorm NXT memorise line followed (LeJos)

I made a line follower program with leJos, it works pretty well; and I want to take it to the next level: I want to make it remember the line it followed; works like this: follow the line till the end,...
0
votes
2answers
111 views

Don't know how to call this but

I want to make a program that does a few things in a random order: I have this so far: The problem here is... I have set the switch block with the random number block to 3 different programs to run. ...
2
votes
1answer
2k views

Lego Mindstorms EV3 crashes on OS X El Capitan

I get the following problem details, can anyone help me? Process: MindstormsEV3 [595] Path: /Applications/LEGO MINDSTORMS EV3 Home Edition.app/Contents/MacOS/...
4
votes
2answers
5k views

Mindstorms EV3 PC application won't load

Installed Mindstorms EV3 application on MS Windows 7 Home Premium v6.1 (Build 7601: Service Pack 1) and I keep getting the same error message when launching. A white window pops up with the following:...
6
votes
2answers
2k views

How to control a RCX from a Mindstorms NXT

I have both an RCX and an NXT. I would like to control the RCX brick from the NXT (and possibly communicate back to to the NXT from the RCX). I would like to avoid purchasing the Mindsensors RCX to ...
1
vote
2answers
812 views

How to install NXT Firmware 1.28?

Lego is giving 1.31 from their website but I need 1.28, how can I install it?
3
votes
1answer
68 views

Programming/running a NXT brick with a dead screen, via PC?

I have a NXT set and the control brick has a dead screen. I tried fixing it (resoldered caps, ribbon rub, etc) to no avail. It's dead. Is there any software that will allow me to program and execute ...
1
vote
1answer
94 views

Direct/system command for reading the display buffer of EV3 bricks?

I recall being able to read in the display buffer of NXT 2.0 bricks over Bluetooth/USB by issuing Read IO Map system commands. I've looked through the bytecodes and communication documentation for the ...
4
votes
1answer
485 views

Lego 3804, Mindstorms Robotics Invention System 2.0 on Windows 10

I gave my grandson (11 years old) the LEGO 3804 Mindstorms Robotics Invention System 2.0. He built a couple things and when he tried to install software to program what he built, the computer would ...
1
vote
0answers
30 views

Mindstorm RIS 2.0 installation on Windows 10 [duplicate]

I recently bought a RIS 2.0 but was unable to install the program onto my laptop running Windows 10 (now). I tried it on my office computer running Windows 7 and the installation was successful. The ...
13
votes
3answers
11k 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 ...
0
votes
0answers
66 views

Why is Bluetooth is so temperamental?

I had a program that would use the Ultrasonic sensor to detect when it was 6 inches from another robot and then would stop send a bluetooth message to the other and would send the other one off. Like ...
0
votes
0answers
64 views

How to receive response from direct_command_reply from EV3 using Python?

I've established and tested a Bluetooth connection (by playing a tone) between EV3 and Mac running Yosemite with Python 2.7.11. I used file write as in bt.write(tone) in Python to play the tone with ...
1
vote
1answer
115 views

EV3 ide flickering

I'm using the Mindstorms IDE for EV3 on OSX. Everytime I'm moving the cursor the screen starts to flicker. See https://www.youtube.com/watch?v=q3JkonowmD0&feature=youtu.be . Any ideas what's ...
13
votes
4answers
24k views

How can I wirelessly connect the NXT and an iOS device?

I've seen videos around YouTube (like this one for a car) that show an ability to control a Mindstorms set via iOS (either iPhone or iPod Touch). I am just getting started with Mindstorms, but find ...
2
votes
1answer
813 views

EV3 Error and VM Program Instruction Break

I'm making a program which is very complex and large but it does not contain any Arrays in it. Weird thing is, last night it worked fine but today when I downloaded the exactly same thing into the EV3 ...
7
votes
5answers
12k views

How to use Power Functions with Mindstorms EV3?

Having learned that Mindstorms EV3 doesn't work directly with Power Functions, Q: Can you use Power Functions motors with the EV3 programmable brick? A: No, the connector does not match. I ...
26
votes
6answers
11k views

What are the best options for building a LEGO RC car?

I would like to build a remote controlled car. And if someone already has a good solution for that I would be glad to try it. It's been a while since I had the time and material to build some LEGO ...
9
votes
1answer
686 views

Connecting to NXT Brick via Processing over Bluetooth

I am attempting to control my NXT model via the Processing programming language rather than the provided language based on LabView. When I can establish a connection over Bluetooth, this works rather ...
2
votes
2answers
2k views

EV3 parallel MyBlocks, but only one working

TL;DR = Is there any obvious reason why a MyBlock, added twice in parallel to a program, will only run one of them? In my EV3-G program, I have a MyBlock which uses the Proximity Heading to control ...
2
votes
1answer
146 views

Using the NBR 1036 Barometer with the EV3

I just purchased the HiTechnic Barometer from LEGO, thinking the Block was available for the EV3. Theory says that I can use NXT Block in the EV3. Can anyone point me in the right direction?
0
votes
1answer
71 views

What is LEGO MINDSTORMS? [closed]

I have heard of LEGO MINDSTORMS, and wondered what it is for the longest time. What is it? What can you do with it?
4
votes
1answer
76 views

LabView Mindstorms - What does speed in seconds mean?

I'm trying to set a motor to spin exactly at 60rpm, and I'm using LabView for Lego Mindstorms. However, when reading the documentation for the move motor block, it says this: Power/Speed ...
2
votes
1answer
189 views

Differences between EV3 Gyro and Hitechnic Gyro

I understand that the Hitechnic Gyro was made for NXT but are there any advantages of using it over the normal lego gyro in EV3??
2
votes
1answer
541 views

Programming The Lego Mindstorms T-Rex from EV3 Laboratory

I bought the book The Lego Mindstorms EV3 Laboratory fron Daniele Benedettelli. I buid the T-Rex chapter 15 and when I tried to programming the T-Rex (chapter 16) I have a problem. I'm not able to ...
1
vote
0answers
47 views

Is there any way to find misplaced bricks in LEGO NXT Programming?

I am working on a Mindstorms NXT project. Due to annoying bug (cannot find terminal hotpoint thingy) I can't delete a specific block, and if I do so, part of the program will be cut off from the main ...
4
votes
1answer
130 views

What are the various LEGO motors that have been produced over the years?

RCX, NXT, WeDO, EV3, Technic etc. How many different motors have been released over the years??
3
votes
2answers
230 views

Lego EV3 - Get output device type, opOUTPUT_GET_TYPE

I would like to know what kind of motor (XL, L) is connected to EV3 output port (A|B|C|D). I need to use direct command: Instruction opOutput_Get_Type (LAYER, NO, *TYPE) Opcode ...
2
votes
3answers
2k views

The Mindstorms EV3 Software crashes on OS X Yosemite 10.10.3. What do I do?

It's crashing on startup which is really irritating. When debugged with terminal it says this: Unhandled Exception: System.UnauthorizedAccessException: Access to the path is denied. [ERROR] FATAL ...
2
votes
2answers
95 views

RCX 2.0 Firmware downloaded successfully but “Run” does nothing

I recently was able to install RIS 2.0 for the first time since I just got a 32bit Windows 7 machine, I got the IR tower to download the firmware to the RCX 2.0 and it showed exactly the same screens ...
3
votes
1answer
170 views

No response when controlling the Mindstorms EV3 brick over Bluetooth

I am trying to control the EV3 using direct commands over a Bluetooth connection. There are no issues pairing the brick with a PC or phone, and opening the serial connection works fine, but sending a ...
1
vote
0answers
85 views

After adding a MyBlock icon to the EV3 palette of MyBlock icons, how can the new icon be associated to an existing MyBlock?

After following the advice given in adding a MyBlock icon to the EV3 palette, can the icon be associated to an existing MyBlock? Something better than copy/paste the contents of the existing MyBlock ...
1
vote
0answers
50 views

What's the first block in MoveAbsolute for programming the T-Rex, in The LEGO MINDSTORMS EV3 Laboratory book? [duplicate]

On MoveAbsolute2 and 1 for The LEGO MINDSTORMS EV3 Laboratory book by Daniele Benedettelli, programming the T-Rex, I don't know what the first block is, can i please have help?