Questions tagged [ev3]
EV3 is the current generation of LEGO MINDSTORMS, released in 2013.
376
questions
5
votes
3answers
204 views
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.
0
votes
1answer
51 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 ...
1
vote
1answer
38 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 ...
1
vote
1answer
34 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 ...
6
votes
1answer
4k 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 resolved; not sure why) but I'd really ...
1
vote
2answers
235 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 ...
2
votes
1answer
594 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 ...
-1
votes
2answers
712 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 ...
0
votes
1answer
241 views
EV3 won't run a certain loop
I'm trying to make a program where an EV3 is IR controlled but if button 9 (toggle) is pressed it goes in autonomous mode. However, my EV3 will not run a certain loop in the program.
It looks like ...
2
votes
1answer
891 views
DIY EV3 from schematics
LEGO offers schematics for the EV3 brick in their hardware developer kit accessible from the bottom of the EV3 downloads page. (Files 1 and 2 in the zip)
Do these schematics contain enough ...
0
votes
1answer
64 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 ...
0
votes
1answer
53 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.
2
votes
0answers
91 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 ...
2
votes
1answer
51 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 ...
5
votes
5answers
2k views
IDE recommendations for EV3 programming
Does anybody have any recommendations for non-GUI programming of the EV3 unit?
I'm impressed by the LabVIEW software, but as a professional C# and VB.Net programmer (with C, C++ experience), I find ...
-1
votes
1answer
172 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 ...
0
votes
0answers
22 views
Recover lost programs from EV3 brick [duplicate]
I saved all my Mindstorms EV3 programs in a pendrive,but now,the the pendrive has broken, so I lost all of my programs. But I have all programs inthe EV3 brick. Does someone know if I can recover my ...
4
votes
1answer
6k views
Can you extract a program from the EV3 brick to the computer?
As part of an assignment, I made a program for my EV3, but however my computer automatically restarted, so I lost that program. I need to show the program! However, the program is still in my brick. ...
2
votes
1answer
3k views
EV3 turning in circles
New programmer feeling my way around. I set the most simple "steering block" to 25, the power to 50, and the number of motor rotations to 40 or 50.
Then I let it run expecting the bot to go in a ...
1
vote
1answer
228 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
votes
1answer
66 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?
3
votes
1answer
56 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 ...
5
votes
1answer
149 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.
3
votes
1answer
98 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", "...
0
votes
2answers
704 views
Is EV3 Device Manager still active?
Link to https://ev3manager.education.lego.com/ is broken - will this be fixed?
2
votes
1answer
2k 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 ...
0
votes
1answer
58 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 ...
1
vote
1answer
846 views
A 90 degree turn with Wheel part number 56145
I'm making a program for my ev3rstorm and I want it to have a 90-degree spin turn. I use the standard part ev3rstorm wheelbase or rather, treadbase. Using the move tank block (I use that block all the ...
1
vote
1answer
110 views
EV3 T-Rex we build keeps toppling over on step
I'm building the standard T-Rex project from Benedettelli's book.
We double checked construction and also step my block - all looks correct.
Any pointers appreciated.
0
votes
2answers
175 views
Programming to get data from EV3 sensor and send it to a server?
I am using EV3 with Linux V1.09 and I am doing a project in which I want to send the sensor data from the EV3 to a remote web server using POST method - is this possible?
3
votes
1answer
499 views
LEGO EV3 on Chromebooks not recognizing NXT bricks
I teach two LEGO robotics classes in middle school and in one of my classes I am using EV3 and in the other NXT. I was able to have these classes because of the Chromebook app, but the problem I am ...
1
vote
0answers
905 views
LEGO Mindstorms EV3: Camera recommendation for line tracking
I am planning to build an autonomous car in LEGO Mindstorms that will use ultrasonic or infrared sensors for collision avoidance and in the future also a camera for line tracking. I am now wondering ...
2
votes
1answer
1k views
Can't create block: “Use of a block which no longer exists”
Unable to compile some documents for deployment:
Program.ev3p: Use of a block which no longer exists.
PutInRange.ev3p
The block I want to make. It will put a input value inside a given range.
When I ...
8
votes
0answers
59 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 ...
1
vote
1answer
50 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. ...
3
votes
0answers
31 views
Chromebook troubles?
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 ...
6
votes
6answers
5k views
What are the programming languages that can be used on Lego Mindstorm EV3?
My son is interested in robotics. For me, I would like maximum flexibility for programming. For my son, I guess something simpler would be preferable so that his interest is not killed by complexity ...
2
votes
0answers
324 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 ...
2
votes
0answers
213 views
EV3 Home edition for Mac missing import block option
I'm running EV3 HE 1.3.1 on macOS Sierra 10.12.6, and I'm unable to import the ultrasonic sensor.
When I open tools -> import block -> browse, the open button is always disabled, it does not allow me ...
1
vote
1answer
101 views
How to use the direct command to make EV3 motor backward?
I write the java language. I use ev3 direct command make ev3 motor to run,
example:
"opOUTPUT_POWER,LC0(0),LC0(0x01),LC0(20), opOUTPUT_START,LC0(0),LC0(0x01)"
In this case, the power is 20 so I ...
3
votes
2answers
344 views
The center “ok” button does not work on EV3 brick
My son has Lego Mindstorms EV3. The brick turns on when he pushes the center ok button, but he can't use it in the menu. What's the problem?
1
vote
1answer
51 views
EV3 touch sensor specs relevant for a brick-built MOC
I want to integrate the following EV3 touch sensors (45507) into a MOC:
For aesthetic reasons, I want the MOC to be mainly built out of system bricks and plates, with only some internal stuff in ...
1
vote
1answer
213 views
EV3 does not react to Bluetooth commands after 1.7 seconds
Short description:
I want to send commands via Bluetooth to an EV3 brick from a Linux computer.
I use python to send bytecodes via Bluetooth and not any EV3-specific software
Pairing the device was ...
2
votes
1answer
158 views
Stepping through Mindstorm program for debugging
The code does not do what I think it should. It is frustrating to tweak it, download it, run it from the block, and find that once again, it does not do what I think it should.
Is there some way to ...
1
vote
1answer
1k views
EV3 IR, ultrasonic senosor datasheets
I want to connect EV3 IR and ultrasonic sensors to my Arduino.
Unfortunately could not find any good documents describing how to use/control them.
Could you please help?
Thank you very much.
3
votes
2answers
480 views
EV3 isn't showing up in programming software after pairing on Windows XP
Running Windows XP x32.
I've connected, paired, connected, paired, paired, and connected, but I just can't get the EV3 software to recognize my EV3!
I've used this EV3 before on a different PC over ...
2
votes
1answer
794 views
LEGO EV3 I2C Compatibility
I'm having difficulties with communication between the EV3 and Arduino boards. Does anyone know if the EV3 is really I2C compatible, or is it just close enough?
Background: I can get the EV3 to ...
3
votes
0answers
192 views
EV3 Brick and Commander app Bluetooth disconnecting
On iOS on an iPad, we're having an issue with the EV3 Brick and Commander app Bluetooth connection constantly disconnecting. The brick just stops responding, so we turn the brick off to disconnect and ...
0
votes
1answer
58 views
Using a remote control for an EV3 robot?
I have just started to get into using a LEGO Mindstorms EV3 robot. I know you have to create a program on the laptop, then it has to be downloaded to the EV3 block.
Can you use a remote control to ...
1
vote
1answer
118 views
How to connect an NXT brick to the LEGO programmer application on an iPad?
Can you connect a NXT brick to an iPad via either USB cable or Bluetooth? For me neither seem to work even though the EV3 brick (and the LEGO programmer application) should be backwards compatible.
...
