Questions tagged [ev3]

EV3 is the current generation of LEGO MINDSTORMS, released in 2013.

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2answers
4k views

EV3-specific bricks missing from Lego Digital Designer 4.3.11 (Win)?

I have LDD on my Mac and have used it to create EV3 models (like an FLL robot, or a Lego dot-matrix printer). Recently, I purchased a cheap Windows laptop for use by a FLL team. After twice ...
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0answers
30 views

Why isn't the LEGO Mindstorms EV3 software compatible with OS X 10.9.5?

The download page said "Mac OS X 10.6 (Snow Leopard) or above" but when I downloaded the EV3 software, I couldn't open it because the installer said: You have OS X 10.9.5. The application requires ...
3
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1answer
157 views

Mindstorms EV3 unable to drive two motors simultaneously

Yesterday I had the basic driving robot with two large motors, but I could not get both motors running at the same time. I had the tank control programming block, with both motors set to 50% and when ...
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0answers
43 views

EV3 menu tabs occasionally vanishing

When I say "EV3 menu tabs," I'm referring to this part: And sometimes it disappears, just like the title says. After testing the EV3, I concluded that there are certain circumstances where this ...
1
vote
1answer
84 views

How do you display multiple items at once on an EV3 screen?

I'm trying to make a program on the EV3 that will imitate the shutdown process. At first, I wanted to make my life easier by naming the program "Shutting Down" and not interfere with the display in ...
2
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0answers
67 views

Lego Mindstorms Software: “Error code: 4”

After updating my EV3 Brick's firmware from V1.09E to V1.10E and reinstalling the Teacher Edition of the Lego Mindstorms EV3 software (even though I'm not a teacher), I decided to recover my Brick's ...
2
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0answers
62 views

EV3 software crashes when coding color sensor switch, how can I fix this?

When students use the switcher block to program the color sensor on their Chromebooks, the app crashes. We have all accessibilities turned off and ChromeOS updated. What other troubleshooting steps ...
1
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1answer
340 views

My EV3 program will not run despite clicking on the program from the brick

This is a new EV3 Education Core Set. I have made a simple move forward command using the Lego Mindstorm EV3 Students Edition and downloaded it into the EV3 brick. However when I press the program in ...
2
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0answers
358 views

How many rotations or degrees do I need to turn my robot?

I have an EV3 Home edition. I have made a tribot. It has two main motors for the wheels and a caster in the back. To complete a full turn in place I need to set the rotations to 2.32 or 835 degrees. ...
5
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2answers
293 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 ...
3
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4answers
404 views

How to prevent my connected axles from falling apart?

In my EV3 robot, I have two rear axles connected to each other using this part mounted like this: [ The problem with this construction is that after a while of driving, the axes disconnects like ...
4
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1answer
38 views

Is there a duplicate/copy paste function in Lego Mindstorms Ev3 programing?

I remember, when I first started out Lego Mindstorms, there was a copy and paste (duplicate) blocks function. I could highlight and right click the blocks then press on duplicate to make another copy ...
5
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2answers
199 views

How to mirror an EV3 motor?

I want to get one EV3 large motor to copy the other. So if I move one half a rotation the other copies.
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1answer
42 views

How do I remove programs from my Lego Mindstorms EV3 project?

The title says it all. But to be more specific, I find it annoying that I have to download one single program to the EV3 Brick but then all the others in the project end up in the brick too, therefore ...
3
votes
1answer
52 views

Error message when using loop index as an array index to get value in arrays

My program moves an ultrasonic sensor around 260 degrees and the values are recorded down in an array variable every 2 degrees it turns. It moves back and measure it 3 more times, storing each ...
2
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1answer
52 views

Is it okay to put rechargeable AA batteries into the EV3?

Is it really okay to put rechargeable AA batteries into the EV3 and continuously put them in after recharging them each time? Boring old one-use AA batteries are getting too expensive for me, and I ...
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0answers
45 views

SPIK3R can't even hold itself

The SPIK3R does not move properly. When I remove the legs and depend on the wheels it works like it should: goes forward when I make it go forward, and turns when I make it go backward. I did not make ...
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0answers
112 views

Given program for EV3 Race Car doesn't work, but why?

I have successfully built an EV3 Race Car with instructions from a fan-made book made by Laurens Valk. In the book, he tells how to make my blocks for the rack-and-pinion steering and how to make a ...
7
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2answers
132 views

Read power usage and respond when motor is straining

Is there a way to know if the drive wheels are "straining", like when locked up with an opposing bot? This is for a Lego sumo bot using the Lego Mindstorms Education EV3 Core Set (EV3 Large Motor ...
3
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1answer
84 views

Chromebook Lego Mindstorms EV3 trouble

I want to make a crane in LEGO Mindstorms EV3 and I've already downloaded the software but as you can see below some coding pieces here are not in the Chromebook version. Should I download the ...
0
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1answer
834 views

Is EV3 Device Manager still active?

Link to https://ev3manager.education.lego.com/ is broken - will this be fixed?
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0answers
176 views

Unable to turn on the EV3

I just can not turn on the EV3 with the SD card. I only turned on it twice. The EV3 stops at [-leJOS EV3] UI and does not go to the next step. I charged the battery, reinstalled the software inside ...
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1answer
220 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 ...
2
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0answers
395 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
267 views

Is the EV3RSTORM from Lego Mindstorms programmable using a real programming language? [duplicate]

I'm a software developer and Lego fan. I'll create a robot with Lego Mindstorms, but I'll like to know that the is EV3RSTORM is programable using a real programming language (Python, C#, JavaScript, ...
2
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3answers
2k views

Mindstorms crashes when connecting to EV3 with Bluetooth

I am using OS X 10.10 (Yosemite) on a 2011 MacBook Air, LEGO Mindstorms EV3 Home Edition v1.0 and the latest firmware on the EV3 (v1.06H) When I attempt to pair the EV3 with my Mac over Bluetooth, ...
3
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2answers
391 views

The center button does not work on EV3 brick

My son has the Lego Mindstorms EV3 brick. The brick turns on when he pushes the center button, but he can't use it in the menu. What's the problem?
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3answers
3k 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 ...
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1answer
737 views

EV3 SPIK3R on Mission 5 just keeps backing up

I completely built the Mindstorms EV3 Spik3r. Missions 1-4 worked fine. However, with mission 5, and using the pre-made program, the robot just keeps backing up, instead of facing the bug, shooting it ...
2
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1answer
6k views

Programming EV3 with NXC

I'm trying to run NXC programs (all run well on NXT) but when trying run it on EV3 I find an error. The download from computer to EV3 runs well but trying to run the program with RUN EV3, I have an ...
4
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2answers
5k views

Why I get this message saying “unable to compile some documents for deployment ev3”?

I have a LEGO Mindstorms EV3 program that I was working on for a long time but recently and suddenly when I try to download the program the software displays the following message: "unable to ...
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0answers
67 views

Confusion with error symbol and coding

I am making a colour sorter robot. However, when I'm trying to detect colour with the colour sensor it displays an error message. The error symbols look like ev3 programming blocks and then an ...
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0answers
100 views

Lego Mindstorms EV3 software being detected as Ransomware [closed]

While I was programming my EV3 robot on my Windows 10, the Lego Mindstorms software immediately closed, and then Bitdefender Antivirus said that it was some sort of Ransomware. It was Bitdefender that ...
2
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1answer
212 views

What kind of mat do you use for running Mindstorm EV3?

Turning EV3 precisely has been a problem. Do you use a certain mat for running EV3 on? Can you tell me what material I need to get the mat printed?
2
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0answers
775 views

Lego EV3 simulator and programming

I've been searching and testing for hours. There is little information on this subject though. I have some specific requirements for a Lego EV3 simulator and programming environment. I do not want to ...
1
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2answers
550 views

Can i change the way the ir remote works?

I bought an EV3 and the first thing that I want to do with it is control models with the remote. I finally discovered how to do this after a long search. It can control the Formula EV3 racing car ...
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0answers
44 views

Converting a .ev3p file into a .ev3 project file

How do I convert a .ev3p file into a .ev3 project file? Everytime I click on the .ev3p file to open it, it just turns up as text in the notepad.
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0answers
51 views

How to get Lego Mindstorms EV3 expansion set (45560) programmes in Scratch

I bought recently Mindstorms EV3 expansion set (45560) and found out that the available programs are written in old LabView-style programming language: https://le-www-live-s.legocdn.com/sc/media/files/...
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1answer
67 views

Do you need multiple start blocks rather than just multiple wires from one start block?

Using the Chromebook app I cannot have multiple "wires" from the start block to multiple sections of code blocks. I have to use a start block for each section. When I try to drag a wire it only ...
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5answers
9k views

Is it possible to edit a MyBlock input parameter value?

I have created MyBlocks but want to change the input parameter to negative. Is this possible or must all the MyBlocks be re-written?
3
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1answer
91 views

Improving EV3 Screen Readability

I often have a hard time reading the EV3’s LCD display. I presume that I’m not the only one who has experienced this issue. Is there a way to improve its readability? For example, are there any good ...
5
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3answers
2k views

Is the LEGO Midstorms EV3 software compatible with OS X Yosemite?

OS X Yosemite (10.10) was just released yesterday. I want to upgrade, but I am worried that the EV3 software will be incompatible. What should I do? A. Upgrade B. Stay on OS X Mavericks (10.9)
5
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1answer
2k views

Can't send multiple commands to EV3 using Python

I want to use Python to send commands to an EV3 brick. In C++ things work as expected - for instance, this starts the motor on port A and then stops it after a while: #include <unistd.h> #...
6
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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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0answers
39 views

Bluetooth connection between EV3 brick and MacBook Pro fails after 2 seconds

As I was adviced, I searched for same questions before posting mine but although some are similar, I can't make their answer useful for my problem. I have a Mindstorms EV3 Education brick and a ...
2
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1answer
82 views

EV3 screen stuck at starting after inserting MicroSD card

I followed the official guide to download microPython and flash it onto an empty MicroSD card (SanDisk Extreme Pro 32GB), but the EV3 screen is now stuck at "Starting" after I insert the MicroSD card. ...
7
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1answer
2k views

How to close color Sensor properly?

I want to get data from the color sensor with Bluetooth. I can get data but when the program terminates, the color sensor dose not close even though I call function close() on the color sensor. The ...
2
votes
1answer
370 views

Current LEGO Digital Designer download is missing a lot of parts [duplicate]

The current LDD download is missing a lot of bricks that were in version 1.3.11 before. Such as, but not limited to: EV3 motors, sensors and the main EV3 brick. Does anyone have a solution/download ...
0
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1answer
370 views

EV3, menu with the buttons?

I've been trying to make a menu that when you press the < button on the block it will start and > button to stop. The menu will also only occur at the start, it will not be ongoing. I've ...
2
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0answers
46 views

How to use Myblock parameters on EV3? [closed]

How do I use them? What do they do? How do they work? I have no idea, and would like some information on them. Thanks.

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