Questions tagged [mindstorms]

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.

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Electronic inside Spike Ultrasonic Sensor 45604

What is inside the Spike Ultrasonic Sensor 45604? Pictures of Top&Bottom PCB-Assembly would be helpful. PoweredUp Cable and Connector use 6-Pin, but why is there used 8-Pin connector inside "...
user22619's user avatar
3 votes
1 answer
55 views

Detect stalling Motor in the new EV3 Education Classroom

I have a gripper that should automatically stop closing when an object is grabbed. I achieved this in the older EV3 Home Edition by reading the motor current and comparing it to normal values. If it ...
grnx's user avatar
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2 votes
0 answers
35 views

How do I get a variable and image into the Lego Mindstorms EV3 image editor

I am making a project and I want the EV3 brick to have a GUI-like interface. It also needs to display a variable on the GUI. Is there a way to draw the GUI and have the live variable reading as well? ...
Michael Savage's user avatar
1 vote
1 answer
44 views

How do I make apps in Lego Mindstorms EV3 Education?

In the EV3 manual, it says you can create custom apps, in the same page as the IR control and Port View. How do you make a new app? I found a button under tools which says "Download as app", ...
Michael Savage's user avatar
0 votes
1 answer
60 views

Colour sensor is not working on Mindstorms EV3

If I plug the colour sensor into one of my EV3 bricks, on Port View it recognises it. However, on my other brick, it shows the colour sensor symbol but says unknown, and shows no reading. The colour ...
Michael Savage's user avatar
3 votes
1 answer
92 views

Problem with emulating EV3 brick via wifi

I'm trying to emulate Lego EV3 brick connection via wifi. First I found the repo and rewrote it a bit in C# so now I have this: LabVIEW.cs public class LabVIEW { public string Serial { get; set; } ...
crackanddie's user avatar
1 vote
0 answers
45 views

How to fix torn EV3 LCD Cable [duplicate]

I accidentally tore my lego EV3's LCD ribbon cable while opening it. I found this post of someone a while back having the same issue, however as my tear is smaller I was wondering if it was possible ...
pythoncat's user avatar
1 vote
0 answers
53 views

Labview Developer mode for EV3 Classroom app

I found a trick to enable labview mode on EV3 Home Edition, however, I cannot find the LEGO Software folder in C:\Program Files (x86) (or C:\Program Files). In fact, I can't even Open file location on ...
Jme's user avatar
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1 vote
1 answer
80 views

Mindstorms program error when I play in download mode

I can run the program perfectly in the streaming mode, but it will flash a red light in the download mode after getting 5 points. Below is my program code: ...........Updated............. Finally I ...
Cat Ho's user avatar
  • 11
0 votes
0 answers
70 views

ev3dev vs lejos - looking for a comprehensive comparison

Did anyone make a good comparison of these two environments? The most important factors to me are OS booting time, RAM usage, application start-up time,, compatibility with USB devices, and power ...
Adam S.'s user avatar
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0 answers
72 views

Is there any way to unzip an ev3 file into text and xml files?

I would like to access the text file of the project files (.ev3p) to know their structure. But in the Mindstorms software, I couldn't find any way to download the .ev3p files.
theboguz's user avatar
3 votes
1 answer
523 views

Lego Mindstorms EV3 broken screen cable

While taking apart my EV3 brick I accidently pulled on the ribbon cable connecting the screen to the motherboard too hard and it broke. I figured I could just get a replacement fpc ribbon cable with ...
dkapur17's user avatar
  • 131
5 votes
1 answer
899 views

Lego colors that the powered up color sensors can detect

Lego currently offers two color sensors to use with Powered Up or robotic kits (Spike Prime, Spike Essential, Mindstorms robotic inventor): https://www.lego.com/en-us/product/color-distance-sensor-...
Michael Verschaeve's user avatar
1 vote
1 answer
196 views

Control MoveHub (Boost) and Mindstorms Inventor Hub over one app

I'd like to control Lego Boost (Move)Hub and the mindstorms inventor hub with one app. I know that it is probably possible with python, but my son is not yet ready to programm in a fully fledged ...
edi's user avatar
  • 113
2 votes
0 answers
143 views

Mindstorms M.V.P. model doesn't move

I'm a total newbie to Mindstorms 51515. I am trying to program my M.V.P. model and everything seems to work except the movement programming blocks (pink). Does anyone have a hint or a clue about what'...
Martin Christensen's user avatar
1 vote
1 answer
201 views

Impact of Mindstorms sets being discontinued?

I was given some Mindstorms sets a while ago and I'm waiting for my kids to grow up so they can use them. Does the recent announcement of their end mean it will brick (pun intended) the kit? Will the ...
dargaud's user avatar
  • 113
3 votes
1 answer
629 views

Is Robot Inventor 51515 future proof? [duplicate]

I need to buy one of Spike Prime or Robot Inventor 51515, but torn between the two choices. The latter is discontinued unfortunately, but is better bang for the buck with more lego pieces. Robot ...
vishr's user avatar
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6 votes
3 answers
6k views

Is it possible to re-flash the LEGO Spike Prime Hub with Mindstorms Robot Inventor Hub Firmware while retaining all functionality? And if so, how?

Unfortunately, LEGO has recently announced that after 24 years, the Mindstorms line of Robotics Kits is officially being discontinued at the end of this year. For this reason, the 51515 Robot Inventor ...
HydroWorldOutlook769's user avatar
4 votes
2 answers
203 views

How to change colour of the bluetooth/charging RGB LED in the hub?

I have the Mindstorms set 51515 - Robot Inventor. I want to display the progress of a robot's work using the LEDs. How can I change the colour of the RGB LED that the hub uses to indicate the ...
Wolfi_HD1's user avatar
5 votes
1 answer
135 views

EV3 Home Shuts down after 2 min. (lights orange, and 3 Icons Triangle, Gage, Manual)

I just purchased a second hand LEGO Mindstorms Home EV3. The brick turns on, allows firmware update, etc. However, after about 2 minutes the unit makes a noise, LED's turn red, and 3 icons appear. ...
Shed's user avatar
  • 51
1 vote
1 answer
194 views

Is there a guide on how to code custom blocks for NXT?

The answer to a previous question pointed to "custom blocks for NXT". I am not talking about creating "My Blocks" in the "Custom Palette", but code blocks that can be ...
algiogia's user avatar
  • 163
5 votes
1 answer
145 views

NXT - Mirror motor rotation

I'm trying to make a program in NXT 2.0 that mirrors the (manual) movements of one motor to another. I managed to start motor B running in the right direction but I am having trouble controlling the ...
algiogia's user avatar
  • 163
3 votes
1 answer
127 views

When using Mindstorms Scratch-like development tool for EV3, is it possible to move a single or a few selected blocks somehow?

Say I have 10 random blocks in a line. Is it possible to move number 4 to position 1 without also moving block 5-10? As far as I have managed to move blocks all following blocks also gets moved even ...
GeeGee's user avatar
  • 31
2 votes
2 answers
290 views

Multiple Programming Blocks Running at Same Time

My team created a simple program to drive robot out. It consists of a MyBlock to drive straight a specified distance and speed utilizing the Gyro sensor. The program then activates a third large ...
John's user avatar
  • 21
8 votes
1 answer
2k views

What's the easiest way to build a delta robot using LEGO Mindstorms 51515?

I'm fairly new to Lego Mindstorms and I'd like to assemble a pick and place mechanism. I was looking for existing delta robot designs and found a lot of good looking designs: https://www.youtube.com/...
George Profenza's user avatar
2 votes
0 answers
190 views

NXT Sensors/Motors not working

I went back to using the NXT brick after two years and I'm having some problems: Motors do not respond to degrees or rotations; Ultrasonic Sensor and Color Sensor are not working; Touch Sensor is ok; ...
Lucas Basso's user avatar
1 vote
1 answer
98 views

Mindstorms v2 QuickTime won’t work

Still trying to get Mindstorms v2 working on Windows XP SP3. QuickTime causes software not to run with error code 2095. Have tried reinstalling QT several times. Tried different versions, no change. ...
Jotec's user avatar
  • 151
3 votes
2 answers
220 views

mindstorms ris2 on XP memory error

I have installed mindstorms ris 2.0 on an XP system. Initially it worked fine now I get an “insufficient memory” error. I have reinstalled and tried a different hard drive. No change. Possibly the usb ...
Jotec's user avatar
  • 151
3 votes
0 answers
246 views

EV3 classroom cannot create New Project

EV3 Classroom V1.5.0 Windows 10 I run a lab of 24 laptops running EV3 Classroom v1.5.0. Over the last week, more and more computers are unable to create new projects and/or open existing projects ...
Jon's user avatar
  • 31
3 votes
2 answers
469 views

Camera for Spike or Mindstorms for Streaming

I have made a few EV3/Spike robots that can be controlled remotely. They are controlled by either a PS4 controller or using a dashboard I built on a website. I'm running Python on the LEGO. However, ...
Adam's user avatar
  • 31
2 votes
1 answer
327 views

EV3 file opens to lobby and won’t open any of the saved programs on it [closed]

Help!! I am using the Mindstorms app on a HP laptop to program missions to an EV3 brick for a robotics team. We saved our programs yesterday after finishing programming a couple missions. Today, the ...
BRANDY's user avatar
  • 21
4 votes
1 answer
118 views

Transformer 45517: power supply or charger?

I would like to build a charging station for EV3 with rechargeable battery (45501). Does the transformer (45517) give a simple stable dc voltage (power supply)? Or does it provide a controlled voltage ...
Jean's user avatar
  • 41
4 votes
1 answer
317 views

EV3 Classroom: Project, Programs and MyBlocks

There are two useful features in the EV3 MINDSTORMS (LabView-based) software, that do not appear to be in the EV3 Classroom (Scratch-based) software. We could create a project and write multiple ...
coolbot's user avatar
  • 41
6 votes
1 answer
322 views

Mindstorm 51515 If then else alternative - like a switch statement

Is there a way to act on multiple values for a variable? For example, x may be 1, 2, or 3. If then else allows for 2 conditions. Multiple "ifs" work, but is cumbersome. Ideally I'd like a ...
BobDaBrick's user avatar
1 vote
0 answers
182 views

"Heads up! Could not open project" error message in EV3 software [duplicate]

Whenever we try to edit one of our old projects our EV3 Mindstorms Home software shows us the "Heads up! Could not open project" screen. What should we do? I am on the Mac OS Big Sur 11.2.3 ...
Spiritbot P.A.K's user avatar
5 votes
1 answer
773 views

How can I restore a .lms file created on Mindstorms Inventor to another device?

I have Mindstorms Inventor. I have been able to send my .lms files to my computer as backup. Now I would like to be able to load those programs on another device. How can I accomplish this?
StanM's user avatar
  • 53
2 votes
1 answer
44 views

LEGO EV3 Brick Type Data File not found

So this morning, I was going to build something with my EV3 kit, when I turned on the brick, the brick said 'Type data File not found'. Then I plugged in my touch sensor and all the motors in their ...
FaZe Crystal's user avatar
4 votes
1 answer
814 views

MINDSTORMS 51515 exporting code

I have created a MOC that I am going to put on Rebrickable. But the code is so complex I can’t do what I normally do and take a screen shot of the code and they replicate it. Does anyone know how if ...
Legofan35664's user avatar
2 votes
2 answers
1k views

What is the max current for the LEGO EV3 motors (pin 1-2)?

The LEGO EV3 Hardware developer kit says that the first and second pin of output port provides a current of max of 700 mA with 1 A but the motors appendixes don't have the maximum current that can I (...
amreo's user avatar
  • 159
2 votes
1 answer
265 views

How can I use the LEGO distance and color sensor from Power Up with the LEGO Mindstorms EV3?

I am asking how I can use the distance and color sensor from the LEGO Power Up series with my LEGO Mindstorms EV3. I know that they have different plugs but I am wondering if there is a solution to ...
Laepog's user avatar
  • 23
1 vote
1 answer
167 views

Connecting EV3 with older motors using conversion cable

I'd like to use an EV3 brick to power an old 9V motor (74569). To do so I'm going to get one of these conversion cables (x1676) but I'm not 100% sure if it's possible to control the speed of the motor ...
Adam S.'s user avatar
  • 11
3 votes
0 answers
118 views

How do I import my programs from makecode (Chromebook) to my EV3 robot

While using makecode I wanted to import my file to my EV3 robot but it says that I have to connect my EV3 robot to my computer and then move the file to the robot. But since I'm on Chromebook I don't ...
Gabriel's user avatar
  • 31
6 votes
1 answer
740 views

Any build instructions for vertical Technic/Lego conveyor belts?

I'm trying to figure out how to continuously lift a stream of incoming pieces up vertically, at least 10cm. This is my first real custom build attempt, so I'm very much at a loss on how to go about it....
Karl M. Davis's user avatar
13 votes
2 answers
4k views

Where can one find the documentation for the LEGO Mindstorms Robot Inventor software?

Is the documentation (either official or unofficial) of the programming "language" for the LEGO Mindstorms Robot Inventor software available somewhere? Preferably online, without requiring ...
zovits's user avatar
  • 16.2k
7 votes
1 answer
859 views

Robot Inventor 51515 - PIN request when connecting via Bluetooth

Just received the item 51515 Managed to connect the Mindstorms controller via Bluetooth from mobile without any problems. Great! Next step, connect from PC. When I connect from my Windows machine I ...
matcheek's user avatar
  • 231
8 votes
2 answers
2k views

How do the Infrared Towers work?

I've seen a few Mindstorms "infrared transmission towers" listed on Brick Owl, Bricklink and other sites. However, I cannot find any good documentation that how they work, how they are used ...
EJ Mak's user avatar
  • 450
1 vote
2 answers
109 views

Who designed EV3RSTORM?

I wonder, who designed EV3RSTORM? I have searched on Google but no results.
Saksham 25's user avatar
4 votes
2 answers
2k views

Where do I find the program to go with the LEGO 51515?

I got a LEGO Mindstorms 51515, and I have finished building my 1st robot, and now would like to program it. However, I cannot find any companion program to use. Where can I install the companion ...
technicguy1's user avatar
3 votes
1 answer
491 views

Why does Pybricks on ev3dev have slow performance compared to EV3-G?

I got MINDSTORMS EV3 for my son and me. We installed Python (ev3dev) and ii seems to be running very slowly. I tried setting up the classic LEGO ev3g (block code), and that seems to run fine. Are we ...
Ishey4's user avatar
  • 141
4 votes
1 answer
512 views

Is there any cross compatibility between 51515 and 31313?

I'm thinking of buying another Mindstorms set, and I already have a 31313. I don't want to spend $370 just to learn they are completely incapable of communicating with each other, so if you could tell ...
technicguy1's user avatar

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