Questions tagged [ev3]
EV3 is the 3rd generation of LEGO MINDSTORMS, released in 2013.
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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 counterclockwise to one another (if one plays ...
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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, ...
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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 ...
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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Improving EV3 Screen Readability
I often have a hard time reading the EV3’s LCD display. I presume that I’m not the only one who has experienced this issue. Is there a way to improve its readability?
For example, are there any good ...
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Color sensor reliable?
I am experimenting with the light sensor shipped within the mindstorms ev3 package.
My Problem is that the bot is standing quiet at one place. Each value returned by sensor is different, although the ...
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Two motors are driven forward, why are they rotating in different directions?
I have the Lego Mindstorms EV3 Pack and built a simple car with 3 wheels. The back wheels are motorized.
When I run the following code:
Motor.A.backward();
Motor.D.Backward();
both motors are ...
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Using two color sensors simultaneously
I am new to the world of robotics, and I'm preparing a new project with my students. Our goal is to make a self driving robot that can read colored signs from the road in order to turn right or left a ...
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Can't link variable inside a switch when creating a new block
I have a problem when connecting the variable (from the create a block) to a variable in the function because it's inside a switch. How can I link them?
I want to connect the variable to each (20) in ...
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LEGO Mindstorm EV3 Line-With-Gaps Follower? [Robotc]
Trying to create an algorithm / code in order to get my robot to follow a track which it currently can do, using a color sensor and following the inside edge. So I'm wondering how to transition to the ...
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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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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.
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