Questions tagged [ev3]

EV3 is the 3rd generation of LEGO MINDSTORMS, released in 2013.

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1answer
150 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. ...
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0answers
405 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 ...
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1answer
4k 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 ...
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0answers
48 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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1answer
59 views

Is it possible to use a switch with three conditionals and the color sensor to compare?

I am using an EV3 robot. Is there a way to program it using a switch, or another way, to compare multiple colors? The goal is to have the robot act as a car and use the color sensor to recognize ...
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1answer
82 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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1answer
576 views

How can I upload .ev3 files to my brick under macOS Catalina

After updating my Mac to macOS Catalina I can no longer run the previous Mindstorms software. The new tool "Mindstorms Home" doesn't allow for opening .ev3 files and uploading them to the brick. Does ...
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1answer
2k views

Is the LEGO Mindstorms Education (not Home, not Scratch based) Edition for Mac OS gone?

I am starting a robotics and programming club with some 9-12 year olds and for the past week I have been developing activities using my Windows version of LEGO Mindstorms (the education / teacher ...
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1answer
181 views

My Mindstorms Spik3r can't turn around

When I use the button for turning it just goes backwards. Why does this happen? I've checked the instructions and didn't find anything.
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0answers
167 views

How do I make a single arm double tap a piano key?

I am trying to make a Lego play piano from ev3, where I have connected two arms to a single motor on either side using Lego elements. Both the arms move counter clockwise to one another (if one plays ...
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1answer
68 views

EV3 software with large blocks

I can't seem to find a download for home or education version of EV3 software that has the large white blocks for either macos 10.13 or 10.15 on my imac. Can someone help? I currently have that ...
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1answer
66 views

How to restart/reset a program automatically after stop block

I have a program that uses the colour sensor to progress that program. The colours are in a certain order. If the wrong colour is detected, the program stops. I want to restart the program from the ...
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1answer
197 views

EV3 color sensor strangeness

I've run across something very strange with my color sensor when using multiple sensors and multiple nested loops for a sumobot. I have 4 separate loops continuously monitoring the "optical", "...
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1answer
164 views

LEGO EV3 Ultrasonic sensor missing from Home Edition programmer [duplicate]

I'll get straight to the point: When I open my LEGO MINDSTORMS EV3 Home Edition programmer and try to use an ultrasonic sensor, there is no option for it in any blocks. I don't even see any allusion ...
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1answer
62 views

How to make Spik3r move without the pincers moving

How do you make Spik3r move without the pincers moving as well? Seems like the legs are only controlled by the motor on port B, but the move tank and steer modules only allow for the use of 2 ports. ...
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2answers
589 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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2answers
730 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 ...
6
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1answer
381 views

Port problem? Mindstorms EV3 brick doesn't detect sensor blocks

I've just bought a second hand Mindstorms EV3 home edition set but the ports aren't detecting any of the sensors just the motors. When checking the ports on the EV3 brick it says "none". I've updated ...
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1answer
300 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 ...
6
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1answer
102 views

What is the use of a single ultrasonic signal?

The EV3 ultrasonic sensor has an advanced mode that includes an option to use single or continuous sensing as described in the Help page: You can choose whether the sensor sends a single ultrasonic ...
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1answer
128 views

Advanced mode in EV3 ultrasonic sensor

The EV3 Ultrasonic Sensor has an “Advanced mode" which measures either in centimeters or in inches. When exactly do you use this mode? Why doesn’t the sensor send just a single ultrasonic signal?
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1answer
333 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, ...
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0answers
113 views

Could Microsoft MakeCode be an alternative to the EV3 program?

Is it possible to use Microsoft MakeCode for the EV3 as an alternative to the widely used EV3 program by LEGO? What are the benefits and drawbacks?
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1answer
503 views

Is there a way to convert .ev3 files to .uf2 files?

I am using Lego Mindstorms EV3 Education Edition and I am wondering if there is a way to convert the default .ev3 files to .uf2 files
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1answer
132 views

Can you change the sensitivity of an EV3 Touch Sensor?

My son is making a LEGO pinball machine and is wondering if it is possible to increase the sensitivity of an Ev3 Touch Sensor as when a ball hits it? Or does he need to use Color Sensors?
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3answers
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Does LEGO no longer support NXT 2.0 at all?

I am running Mac OS X 10.15 (Catalina) and the EV3 software can't detect my NXT 2.0 using USB.
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1answer
127 views

Is it possible to use multiple IR beacons on different channels to control EV3?

One IR beacon has very few buttons and I would like to buy additional beacons and use them simultaneously to be able to control more channels. I can't find any information if this setup will work. ...
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1answer
56 views

Can the EV3 software program switch block take inputs?

Is it possible to input values into a switch block? For example, if I have a move steering block in switch statement, can I input a value for power from a math block outside the switch statement? If I ...
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0answers
88 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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1answer
122 views

Detect distances over 255cm with EV3 ultrasonic sensor?

In my use case, I have to detect things about 3-4 meters. I don't need to be accurate, +-2 or 3cm is enough. The EV3-G and most other places have a max distance of 255cm, which I understand that it is ...
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0answers
69 views

How to import file to Mindstorm Programmer?

I got a Mindstorm set a year ago and I stumbled across a build which looked really cool! I finished the building part then I downloaded the program file but I couldn’t import it. I have a MacBook ...
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95 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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2answers
10k 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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2answers
503 views

Port Splitter for EV3 motors

I have searched all over the internet for EV3 port splitters for motors. I have got 4 large motors and 2 medium motors and I do not have enough motor ports for them all. I can usually only find sensor ...
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1answer
91 views

Unable to change program name in EV3 IDE

My students are having a weird problem in the EV3 IDE. When we try to change the program name, in the IDE, the name reverts to program. As an example, if the student is creating several programs, ...
2
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1answer
804 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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1answer
118 views

How to distinguish between objects using a sonic sensor?

I am trying to find a ball in the field, grab it, and drop in the specified area. I'm using an ultrasonic sensor on the front of the robot. My current solution for locating the ball is: Turn ...
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1answer
271 views

EV3 PID line follower with medium motors

I am stuck on creating an efficient line follower with medium motors. The problem is that the motors are rotating in different ways so I can't use the steering block. I would appreciate any kind of ...
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0answers
43 views

T-R3X the look My Block problems [duplicate]

OK I am making the look My block for the T-R3X program but there is this block which don't know how to make at the end of the diagram in the book.
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1answer
194 views

how to send direct command to ev3 brick

I am new to ev3 python but am working on a project. I was reading about NXT-python that " It works by sending the direct commands detailed in LEGO's "Blue-tooth Development Kit" to the NXT brick" I ...
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1answer
134 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
281 views

What does this error symbol on the EV3 mean?

I get this error image pop up when I power on my EV3. What does it mean? Also, is there a list of different error codes anywhere, I looked in the User Manual and I could not see anything. Cheers!
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1answer
275 views

Stuck on “Installing rootfs” when installing leJOS on the brick

When following the instructions for creating an SD card with leJOS, the brick freezes when it comes to the screen “Installing rootfs.” I'm using a new 32 GB SanDisk SD card. I've confirmed that I'm ...
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1answer
84 views

Is there a way to restart a program with EV3?

I've got a program with a code lock, and I would like the program to restart when you enter the incorrect code. Does anyone know of a way to do that?
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1answer
601 views

How to make a point coordinate system for EV3

I'm trying to make a internal coordinate system for an EV3 Python project I'm doing, but at a complete loss on how to do it. It needs to keep track of how it moves (with wheels) in an X, Y coordinate ...
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1answer
203 views

Run Code From PC

https://www.ev3dev.org/projects/2014/05/09/Python-Rubiks-Cube-Solver/ The other one gives a solution in around 20 steps, but takes around 500 MB of memory, so I need to run it on a computer How do I ...
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2answers
193 views

What does this symbol on the EV3 Brick mean?

I can’t figure out how to get my R3PTAR to open and close it’s mouth to bite. I keep getting this symbol. What does it mean?
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1answer
61 views

Looking for custom EV3 block to control LEDs independently

The EV3 brick has 2 LED sets, one on the left side of the button panel and one on the right. Software such as python for ev3dev let's you control them both individually, the normal EV3-G LED block ...
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0answers
61 views

Using switch block with Hitechnic color block

Can I compare the Hitechnic block --> measure --> color output in a switch block? For example, if the Hitechnic color sensor is seeing black, then do something, else do another thing. If not, then how ...
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2answers
319 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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