Questions tagged [ev3]
EV3 is the 3rd generation of LEGO MINDSTORMS, released in 2013.
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What is the LEGO EV3 rpf file?
I read the LEGO Mindstorms EV3 Communication Developer Kit's document.
I have a question in 4.2.1 (Start program “Demo” on EV3 brick) it is mentioned "The file-extension is "rpf" and NOT "rbf", so ...
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Colored balls detectable by EV3 color sensor
I'm looking for large balls in standard Lego colors that are detectable by the EV3 color scanner.
So black, white, green, brown, yellow and blue and between 5 and 10 cm.
I'm aware of the Duplo balls:...
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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 ...
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What does taking Raw value for EV3 Colour sensor do?
I participate in Robotics competitions like the WRO and I want to know if using EV3 colour sensor raw values helps in line follow.
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"Unable to compile" error code with LEGO EV3 Arm Robot Program
Does anyone know how to fix this error with my LEGO EV3 program?
Unable to compile some documents for deployment:
Program.ev3p: Use of a block which no longer exists.
INI.ev3p: A My Block cannot ...
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How to make Lego Mindstorms EV3 robot go in reverse when move steering input comes from proximity sensor
I saw an program on the Lego Education page which makes a Lego Mindstorms EV3 robot gradually slow down as it approaches a wall. The info from the proximity sensor is used as the direct wire input of ...
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Why do two EV3 bricks have different power outputs?
I have two identical box designs with EV3 bricks. When I upload the same programs to both, one moves about twice as fast as the other.
Is there a reason that this might be happening? Is there ...
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How do I have an else in conjunction with an if statement with two conditions?
I can't find a way to emulate an AND statement in a switch statement:
if (angle >= 10 and angle <= 30)
;// do smth
else
; // this is what I want
Until now, I just nested two if ...
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EV3 brick Bluetooth connection error
I’m unable to pair the ev3 brick to our iPad mini. Both see each other but I keep getting this error on the ipad, Connection Unsuccessful, make sure ev3 is turned on and in range. And the ev3 shows a ...
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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 ...
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Two Mindstorms touch sensors: how to determine which sensor was pressed?
I'm trying do make simple program. Two motors, two touch sensors. Sensor one increases speed, sensor two decreases.
The whole program works very well but only with one sensor. When I put some logic ...
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Is there an leJOS simulator for EV3?
I found this but this seems to be using their own library to control the EV3.
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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 ...
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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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Mindstorms program - myblocks that work fine when run individually but when executed as part of a larger program, break
We have a line following myblock, which follows the line perfectly if it runs alone. However, if we include it as a block as part of a larger program, it goes haywire when it gets to that step and ...
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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 ...
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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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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 ...
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Why does my EV3 not have data logging in Brick App menu?
I recently purchased a 45544 Educator Mindstorms product. In working through tutorials. I am at section on data logging, but my Brick Apps menu stops at Brick Program. Data Logging is not on menu
My ...
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Does the Lego Mindstorms EV3 software work on macOS High Sierra?
Will there be issues with the software, or will it work properly on macOS High Sierra?
My Mac: Retina MacBook Pro 13", Early 2015
user4077
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How To Plug Detected Light Values into Variables and Still be Usable in Programs in EV3-G
I've seen teams, mostly in the world festival do this, and what they do is they program the robot so that when a brick button is pressed, the robot detects a value (usually RLI) and it is used later ...
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ev3 brick blocked during running a program
I pressed "Run my program" (a simple one), and it is stuck with "mindstorms sound_turn_on" displayed on the screen. The name of my program is sound_turn_on. I am using LabView to program it. Now ...
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EV3 motor control proportional to another motor when more than two motors
From what I understand, in EV3-g you can use "move steering" or "move tank" blocks to regulate two motors proportionally to each other as they have a built-in PID controller to do that.
If one motor ...
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Is the LEGO BOOST kit compatible with EV3 or PowerFunctions motors and sensors?
I'm curious if I can use my existing EV3 and/or PowerFunctions motors to extend the functionality of my LEGO BOOST set. Is this possible?
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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 ...
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EV3 switch block does not recognize text?
i am using file access to input variables into my programm.
text file is something like this:
a
b
c
..
on each loop, program access file (using File Access block) and reads a new line "a" or "b" or "...
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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?
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Is my EV3 controller bricked? [duplicate]
My EV3 controller seems to be 'stuck' in this state:
Is the device operating properly?
If not, is there a procedure that can unbrick the controller?
Thank you
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Is it possible to fix a broken EV3 Port?
I have an EV3 running RobotC version 4.55.
The medium motor connected to Port A does not run, but if I connect it to another port (B,C,or D) it works. I tested it manually through the EV3 motor tab ...
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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.
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How to connect two LEGO Bricks EV3 by USB using python
For some project, I have to use 7 motors with ev3 bricks.
So I would like to connect 2 bricks using USB-USB link, and make them communicate, in python.
But I don't know how to do that, I've tried ...
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EV3 connection problem via USB on Windows 8.1
I am using LEGO EV3 on windows 8.1 eclipse Neon. When I try to launch the class as a LeJos application I get this error.
IP address is /10.0.1.1
Creating the jar file or uploading the program failed
...
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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 ...
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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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How can I build a compact EV3 gearbox?
I'm building a sumo bot in EV3 and would like to have both 1:1 and 1:3 gear ratios, with the first being useful for general driving and the second more for pushing other robots.
My problem is, I ...
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Are there any benefits to using PF motors instead of EV3 ones?
Can someone explain to me the key differences between PF motors and EV3 ones? I understand that EV3 motors are 'regulated', presumably meaning that you can control their rotational speed depending on ...
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How can I make my robot heavier?
I'm building a 3kg LEGO EV3 sumo robot and I need to make it as small as possible.
Which LEGO items do you recommend to add more weight on it? (tires, plates, wheels, blocks, minifigs etc.)
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LEGO mindstorm EV3 control using FPGA
I need advice on this issue. I want to build a communication between EV3 Mindstorms and FPGA. I want to control the different actuator/sensor of the EV3.
The idea is to test functionality of my ...
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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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EV3 Wired Brick to Brick communication
I'm currently working on a project for my intro to engineering class.
As it stands now, one brick is running a LabView program to intake data from a 'barcode' and another brick runs a Matlab program ...
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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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Any way to track a light source in 1 dimension using one color sensor?
I would like to know if there is any workable way to use a single color sensor to track a light source in one axis of rotation?
Would rotating the sensor back and forth within a few degrees, every ...
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Bazooka blast ev3 Mindstorms using Python
I would like to shoot balls with the ev3 Lego robot. How can I code it using Python?
Which components do I need for that and which function and motor use ?
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System.ArgumentException: Only Sequence Wires can be snapped
I try to open an project on last version of LEGO Mindstorm EV3 Home Edition, but the system shows the next error message 'An unexcpected error has ocurred. Please restart LEGO MINDSTORM EV3.' After ...
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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 ...
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EV3 not recognized by PC when attempting firmware update after interrupted update
I have just sent the following inquiry to Lego Customer Support:
I aborted a firmware update and now the Intelligent Brick does not get past the "Starting.." message when it is turned on. I ...
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What is the best option for Mindstorms EV3 remote control for motors?
I have never experimented with remote controlling EV3 but I wonder what is the best way to use it, especially in the case when I'd like to control large and medium motors parallel as well, possibly ...
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Moving the motor to certain initial position [duplicate]
I was assisting my child in EV3 missions, specifically, the 3rd mission of TRACK3R, the one where the robot has to grab two tires and put them elsewhere.
The mission requires to manipulate the Medium ...
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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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Is code written for NXT bricks compatible with EV3 brick (for Johnny 5 building)?
My son is mad on the robot from Short Circuit (Johnny 5) and I want to build robots with him. We have a copy of Daniele Benedettelli's "Creating Cool Mindstorms NXT Robots" and I was planning to start ...
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