Questions tagged [ev3]
EV3 is the current generation of LEGO MINDSTORMS, released in 2013.
356
questions
3
votes
1answer
44 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 ...
1
vote
1answer
34 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?
0
votes
1answer
156 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, ...
0
votes
0answers
51 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?
3
votes
1answer
60 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
7
votes
1answer
62 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?
4
votes
2answers
92 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.
2
votes
1answer
44 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. ...
2
votes
1answer
33 views
can ev3 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 ...
0
votes
0answers
42 views
Release date for New LEGO® MINDSTORMS® Education EV3 Classroom? [duplicate]
What is the release date for LEGO® MINDSTORMS® Education EV3 Classroom for New macOS (macOS 10.15 Catalina)?
2
votes
0answers
40 views
When the Chromebook crashes after coding the color sensor switch, what can I offer students to do for troubleshoot this consistent problem?
When students use the switcher block to program the color sensor on their Chromebooks, the app crashes. We have all accessibilities turned off and ChromeOS updated. What other troubleshooting steps ...
0
votes
1answer
45 views
EV3: Detect distances over 255cm with 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 ...
1
vote
0answers
27 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 with ...
0
votes
0answers
14 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 ...
2
votes
1answer
804 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 ...
1
vote
2answers
132 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 ...
0
votes
1answer
42 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, ...
1
vote
1answer
116 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
75 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 ...
0
votes
0answers
36 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.
1
vote
1answer
85 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 ...
0
votes
0answers
17 views
changing ev3p file back into an ev3 project file
how do I change an ev3p file into an ev3 project file. Everytime that I click on the ev3p file to open it, it turns up as text in notepad.
1
vote
1answer
124 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!
0
votes
0answers
48 views
The HiTechnic Color sensor is not detected in the port view in lab view
When I inserted the HiTechnic Color Sensor Block into the Ev3, the Ev3 detected the color sensor. But in my Mindstorms lab view, the HiTechnic color sensor does not appear on the port control. Can ...
2
votes
1answer
93 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 ...
1
vote
1answer
54 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?
1
vote
1answer
151 views
How to make of 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 ...
0
votes
1answer
126 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 ...
1
vote
2answers
116 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?
0
votes
0answers
43 views
EV3 Brick is Stuck on Red
The EV3 brick started by flashing red. Then started where it is stuck on two red buttons. Have changed batteries, and manual reset with no change.
2
votes
1answer
47 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 ...
0
votes
0answers
45 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 ...
2
votes
2answers
135 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), ...
3
votes
1answer
80 views
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 ...
2
votes
0answers
44 views
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 ...
1
vote
2answers
61 views
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 ...
3
votes
1answer
80 views
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 ...
0
votes
1answer
134 views
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 ...
0
votes
2answers
135 views
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 ...
1
vote
1answer
87 views
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 ...
0
votes
0answers
70 views
EV3 Spinner factory not moving in the right order
We've built a spinner factory going by the original instructions in the Lego Mindstorms EV3 Education Software, and downloaded the program for it onto the bricks, the Spinner factory moves around, the ...
5
votes
1answer
115 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.
1
vote
1answer
91 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.
...
1
vote
2answers
72 views
Buy the complete EV3 set or only the brick?
I have an old NXT (or NXT 2.0, do not remember exactly) bought I think in 2007.
I would like to upgrade to EV3, but I am not sure if I should buy the complete set or only the central brick.
Is there ...
5
votes
0answers
60 views
Read power usage and respond when motor is straining
Is there a way to know if the drive wheels are "straining", like when locked up with an opposing bot?
This is for a Lego sumo bot using the Lego Mindstorms Education EV3 Core Set (EV3 Large Motor ...
2
votes
0answers
195 views
How many rotations or degrees do you need to turn your robot?
I have an EV3 Home edition. I have made a tribot. Two main motors for the wheels and a caster in the back. To complete a full turn in place I need to set the rotations to 2.32 or 835 degrees.
Does ...
3
votes
3answers
215 views
EV3 Multiple conditions: wait sensor activation for N seconds or
How to program EV3 to wait for a sensor activation for at most X seconds?
If the sensor is activated in the given time, begin sequence B. If it is not activated in X seconds, begin sequence A.
...
0
votes
2answers
562 views
Is EV3 Device Manager still active?
Link to https://ev3manager.education.lego.com/ is broken - will this be fixed?
5
votes
1answer
2k views
How to install Firmware 1.10E on an EV3 home/retail edition brick
If and how can you install firmware 1.10E on an EV3 brick from an home/retail edition set (instead of an education set)? Updates 1.0E9 are only recognized from the Mindstorm software, also with ...
0
votes
1answer
130 views
How I can program a solar panel heliostat? [closed]
I want to make a program for an EV3 solar heliostat.
It consists of two motors and a color sensor. I want it to follow the light. The station is fixed.
EV3SolarStation pdf
