Questions tagged [ev3]

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

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162 views

Strange blocks appeared in my program

In my Mindstorms program, I found these strange blocks. They appeared when I sent this program to my other PC on Windows 10, which is more powerful. They don't work and I can't change them. Mindstorms ...
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27 views

EV3 Folder not appearing on Windows

I am attempting to load a UF2 file into an EV3 robot, however when I plug everything in, nothing appears. Windows recognises that a device has been plugged in, and it even appears in the Device ...
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1answer
77 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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1answer
172 views

Is it possible to use EV3 MicroPython with Windows 7?

I have been trying to get python on my EV3 brick using an EV3 MicroPython SD card image as described on the Lego website. The EV3 brick seem fine with its new OS. Instead my problems are at the ...
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2answers
10k views

EV3 Ultrasonic Sensor block is not availible in the Home Edition software

I can't find the ultrasonic sensor block on the programming app on my computer. I am using the Lego Mindstorms EV3 Home Edition.
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3answers
131 views

Distance Learning Mindstorms web-based software

I am a Technology education teacher from NJ and I use Lego Mindstorms for my 8th-grade robotics class. Since we are doing distance learning (teaching from home) my students have not been able to ...
2
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1answer
55 views

EV3 program runs fine when connected to PC but does not respond when copied to the brick

I am building the race car mentioned in the LEGO Mindstorms discovery book using an EV3 brick. The problem I am facing is that the driving program runs fine when the brick is connected to the PC via ...
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0answers
41 views

EV3 motor port works in motor control but not in demo mode

I have a new EV3 set and tried running the Demo program on the initial build. Only the left motor turned, so the robot kept going in circles instead of going straight like its supposed to. When I ...
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43 views

EV3 square pattern motion

I'm trying to make my EV3 robot move in a square path, and an infinity path. I've tried this code for a square path but it's not working.
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1answer
51 views

EV3 Gyro sensor is not working

I started using the EV3 Gyro for the first time in a few months, and it's not working. When I rotate the robot the output shown in the EV3-G port view stays at zero. In the rare case it registers some ...
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28 views

Infrared Sensor Activation Problems

I tried running my program that requires an infrared sensor, but it didn't work. I looked at the port view and I saw the infrared sensor. It was connected, the brick recognized it, but had a "---&...
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2answers
223 views

Seeking HiTechnic Color Sensor V2 control block for EV3-G

I'm looking for the EV3-G control block for the HiTechnic Color Sensor V2, previously distributed by HiTechnic (https://www.hitechnic.com/cgi-bin/commerce.cgi?key=NCO1038&preadd=action), ...
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2answers
122 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 ...
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4answers
492 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 axles disconnect like ...
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0answers
93 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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1answer
575 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
421 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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84 views

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

When students use the switch block to program the color sensor on their Chromebooks, the app crashes. We have all accessibilities turned off and the OS is fully updated. What other troubleshooting ...
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2answers
2k views

How to make a Lego Mindstorms ev3 self driving car?

I recently got the Lego Mindstorms EV3 kit. I wanted to make a self driving car, but I got stuck on the building part. I saw another question like this, however it was for NXT and had no decent ...
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2answers
815 views

EV3 Motors not moving even though EV3 has batteries

I am new to using the EV3. I have only had it for 3 weeks. My question is why are my EV3 motors not moving? I know the motors are new and they are in such a good condition they could be sent back ...
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1answer
347 views

Mindstorms EV3 education 1.4.2 for Windows crashes when opening second project

The EV3 software opens the first project with no problems, but when I open a second project it crashes and terminates. I tried to install the EV3 software on Windows 10 (MS Surface laptop i7,16GB RAM),...
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2answers
214 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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4answers
3k views

Downloading EV3 programs: Error code 0

When I download some programs to my EV3, the application gives me an error as shown below. Error downloading Projects/SUP3RCAR/ResetSteer.rbf during deployment. Error code:0 Can somebody tell me ...
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2answers
5k 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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53 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 ...
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1answer
197 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
44 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 ...
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0answers
79 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 ...
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1answer
392 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
386 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
297 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 ...
4
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1answer
49 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 ...
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1answer
58 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 ...
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1answer
60 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
66 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
55 views

SPIK3R can't even hold itself [closed]

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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125 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
147 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
96 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 ...
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1answer
907 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
177 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
229 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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1answer
280 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, ...
2
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2answers
421 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?
2
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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
750 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 ...
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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
107 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 ...

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