Questions tagged [ev3]
EV3 is the 3rd generation of LEGO MINDSTORMS, released in 2013.
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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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Is Mindstorms EV3 backwards compatible?
LEGO Group announced the next Mindstorms version, the EV3 which will be available in the Fall, 2013.
Does anyone know if the new version, specifically the controller, will be backwards compatible ...
user1262
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EV3 T Rex problems
I am new to this and I need some help with the moveabsolute block which is described in Chapter 16 of Daniele Benedetelli's book. In figure 16 - 2 he describes the block and here is my problem: I ...
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What is different between the EV3 Home and Educational sets?
The newly announced LEGO Mindstorms EV3 sets for home and education have some differences, but it isn't clear to me what they are, specifically. It seems that have different sensors, perhaps ...
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How to remember initial position of a robot and return to it
I have an EV3 robot with motors, like a car, that can move forward/backward and left/right and have some sensors attached. I want it to remember its initial position by remembering all the movements ...
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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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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?
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EV3 screen stuck at "Starting..."
After I turn the device on, its screen is stuck at "starting..." for a long time. It hasn't change into the regular screen, and the light behind the button was still red (didn't become green). Is ...
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Export LEGO MINDSTORMS EV3 Lab Code
I was wondering if it was possible in any way to see the actual code that is generated by the Lego Mindstorms IDE.
I know there isn't a direct 'export to code' option within the tool but I wondered ...
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Is there a changelog for any firmware updates on an EV3 brick?
When a firmware update is released for the Mindstorms EV3 brick, are there usually any changelogs for them explaining what's been added or changed? If so, where can they be found?
user5971
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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 ...
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Understanding the makeup of an XML .ev3p file
When you unzip an .ev3 program, there are many txt and xml files that are inside. In particular, there is an xml file produced with the filename extension .ev3p, which seems to contain program ...
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How can an EV3 motor "remember" it's starting position?
I am currently working on a project that uses large motors. I want the project to return to a "starting position" (0,0,0) at the touch of a button so that it can be used multiple (identical) times. ...
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EV3 Brick Error Symbols?
I am currently developing an EV3 robot that sorts colored technic beams. However, the brick will only run part of the program and then generate a strange error code on the brick's screen. The error ...
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On Lego Mindstorms EV3, is there a way to change the input parameters of a My Block? [duplicate]
I am writing a program for which I did a My Block. I later realize that I need to add a new input parameter and I can't find a way of doing this without creating a new My Block. This seems it should ...
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Use legacy RCX sensors with EV3
In NXT-G, there was a "Legacy" Block pack which had blocks to allow for the use of RCX motors/sensors with the NXT, as long as you had a converter cable. However, the EV3 software does not have this, ...
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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)
user4077
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Where can I download the EV3 education edition software for free?
I have a site license but I'm not able to find the download for the software anywhere. Any help would be greatly appreciated.
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Using the unregulated motor block and conversion cable to light LEDs
I have the following setup:
It consists out of
An EV3 brick
A nxt to 9v conversion cable (https://www.bricklink.com/v2/catalog/catalogitem.page?P=x1676)
A 20 cm 9v to Power Functions conversion ...
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Spik3r wheels move but the spik3r itself doesn't
Our Spik3r's wheels move but the Spik3r itself does not move. Please see the picture of the back of the vehicle - is it somehow incorrectly built?
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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 ...
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Lego Mindstorms EV3: programming language recommendation
I am planning to build an autonomous car in LEGO Mindstorms that will use ultrasonic or infrared sensors and in the future also a camera for line tracking. Currently I construct my programs using the ...
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How to get good color readings from the color sensor?
What type of setup is needed to get good color readings from the Mindstorms EV3 color sensor:
Shape of object?
Size of object?
Distance to object?
Color of background?
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Is it safe to try different firmwares on EV3?
I have prepared a SD card to run Lejos on EV3, as said on Lejos Sourceforge page and I'm about to test it. What worries me - will I still be able to go back to original Firmware if something goes ...
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Lego Mindstorms Ev3 home edition on Mac OS Mojave bug - bricks sometimes go blank
I have a fresh install of Mojave and of Mindstorms Ev3 home edition. It seems to work fine but then randomly all the information disappears from the blocks at the bottom of the screen, and sometimes ...
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Compatibility EV3 software with NXT brick - known limits?
Lego says I can I use the new software to program old NXT bricks:
Q: Is EV3 backwards compatible with NXT hardware?
A: Yes. You can program your NXT intelligent brick using the new EV3 ...
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How do you program mindstorms to keep doing a task until either the IR OR the colour sensor state changes
How do you program mindstorms to keep doing a task until either the IR OR the colour sensor state changes. I would like to use the wait block but it can only be either the colour sensor or the IF ...
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API for Android or iOS connecting to EV3 by bluetooth
There is official API for Windows, WindowsPhone8 and WinRT https://legoev3.codeplex.com/ it lets you connect to EV3 brick and control it remotely from your WindowsPhone.
Are there any libraries ...
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What are the differences between NiMH and Alkaline batteries for the EV3?
Currently I am using six rechargeable batteries for my Lego Mindstorms EV3.
A few seconds after I start a motor the EV3 gives a notification that that the battery is low.
I know that good batteries ...
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Does the Mindstorms EV3 software run on OS X El Capitan?
El Capitan was released a few days ago, and I want to upgrade. Will there be issues with the software, or will it run nicely on El Capitan?
My Mac:
Retina MacBook Pro 13", Early 2015
user4077
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Lego RCX to NXT converter cables not working properly with EV3
I recently got some of these cables(see picture below) to control an old RCX motor. Some things to note before reading on. I tried both the medium and large motor blocks and played around with power, ...
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What is the best way to program Mindstorms EV3?
I'm just starting to use the LEGO Mindstorms EVE robot and I'm a bit hesitant which way to choose for programming: the official graphic software or any alternative (preferably the Linux based ev3dev)?
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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>
#...
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How can I order an Ev3 gyro in Europe
I just bought the Ev3 kit, knowing that the gyro sensor is not included. I obviously want a gyro sensor, perhaps also the ultrasonic sensor. Is there any official channel to order them in Europe? All ...
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EV3 controlled by 8879 speed control through IR sensor
Is it possible to send commands to an EV3 brick from the Power Functions Speed Control remote?
Would I have to interpret the raw sensor values to do this? Are there any references that would help?
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EV3 SPIK3R Mission 2 doesn't move
So I was building Spik3r and I thought I got mission 2 completed. Wheels are turning, legs are moving but the robot just does not move.
It looks like the small wheels should be moving the robot but ...
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How do you open a logfile (.rdf) downloaded from an EV3 brick?
I have been logging data for a few sensors, and would like to import that data into Excel. What exactly do I need to do? I remember reading somewhere that LabView can export logging data (I have the ...
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How to get double the speed from 2 regulated EV3 motors?
So I've noticed that if I connect two EV3 motors to one another (with gears), I still get exactly the same maximum speed as if I had a single motor.
So, my question: how can I get twice the power/...
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EV3 Education Edition software license
I got a new EV3 education kit.
Can I install it on a several computers or does the license work on one computer only?
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EV3 brick cannot connect my to computer
I can't connect my brick to my computer. It keeps saying it can't communicate with the brick. My brick has no firmware. My friend said to change the USB cable but it still doesn't work. I can't ...
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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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Can a EV3 program run simultaneously with the Running Robot commander app?
Is it possible to run the Robot Commander app and a program on the EV3 brick at the same time?
If so how would it be accomplished?
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How can I create custom EV3 blocks (developer mode)?
What do I need to create custom blocks and in particular the VIX part?
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No response when controlling the Mindstorms EV3 brick over Bluetooth
I am trying to control the EV3 using direct commands over a Bluetooth connection. There are no issues pairing the brick with a PC or phone, and opening the serial connection works fine, but sending a ...
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Programming The Lego Mindstorms T-Rex from EV3 Laboratory
I bought the book The Lego Mindstorms EV3 Laboratory fron Daniele Benedettelli. I buid the T-Rex chapter 15 and when I tried to programming the T-Rex (chapter 16) I have a problem. I'm not able to ...
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Should I buy the retail or education version of Mindstroms EV3?
There are other questions that list the differences in the retail and educational version but I cannot judge which one I should buy (educational or retail).
I am buying Mindstorms for the first time, ...
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Anyone have the control block for the hitechnic color sensors?
I'm just wondering if anyone has a copy of the control block for the hitechnic color sensor v2? I'll take a v1 if you have that because I'm desperate at this point. The downloads page for it is down ...
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Can additional MyBlock icons be added to the EV3 palette of icons available in the MyBlock builder?
I'm a big believer in using MyBlocks when using EV3. For FLL teams, every robot needs to move forward, backward, turn right, turn left, arm up, arm down. Even before a robot is built, those MyBlocks ...
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How do I add the lms2012 library as a dependency within Visual Studio
I'm following this question and am curious how I go about actually importing the following the necessary dependencies. I see this line:
#include "ev3sources/lms2012/c_com/source/c_com.h"
and have ...
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Logging and performing mathmatical calc. during run?
Is it possible using the new EV3 to log data, and peform mathmatical calculation on the data while it's being logged, and peform some and thereby trigger some event if some value has been reached??
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