Questions tagged [ev3]
EV3 is the 3rd generation of LEGO MINDSTORMS, released in 2013.
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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 ...
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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 ...
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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 ...
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How many rotations or degrees do I need to turn my robot?
I have an EV3 Home edition. I have made a tribot. It has 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.
...
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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.
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Is EV3 Device Manager still active?
Link to https://ev3manager.education.lego.com/ is broken - will this be fixed?
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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 ...
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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
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Lego EV3 simulator and programming
I've been searching and testing for hours. There is little information on this subject though. I have some specific requirements for a Lego EV3 simulator and programming environment.
I do not want to ...
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How do you convert the ev3p program files and assets back into an ev3 project file?
I edited the ev3p file, and I want to see the changes by opening it in the ev3 IDE. How do I convert all of the files back into an ev3 project file?
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What is this EV3 controlling app
What is this EV3 controling app that is used here:
https://youtu.be/Sjix76QjtMU?t=1m43s
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How can I get the EV3 to control an ordinary motor with PWM?
Looking at the hardware developer pdf, it looked like the EV3 should output a PWM signal with a duty cycle corresponding to power level. It does, but only for 100ms and only on pin 1.
Is that how the ...
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Why does the Gyro Sensor not work correctly in Virtual Robotics Toolkit?
I somehow found out about Virtual Robotics Toolkit and when I did, I decided that it would be great software to use for Lego League. Later in my research, I found that it automatically had the newest ...
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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 ...
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Is the EV3 compatible with a 3rd party I2C gyroscope?
The only detail I've found so far is that the pull-up resistor should be 82k ohm. I'm wondering If I could just get something like this Adafruit Gyro/Accelerometer
and just hook it up to the SDA and ...
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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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How do I delete custom images I made in my computer?
I created a custom image for a test, and everytime I download the program to my brick, the image shows up in the folder despite me not using a display program. How do I fix this?
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How can I have EV3 Commander App continue running the motor when I release the slider?
I'd like to control a drawing robot that I am building with EV3 Commander App.
The problem is that EV3 Commander App stops the motor as soon as I release the slider.
Is there an option with EV3 ...
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What kind of mat do you use for running Mindstorm EV3?
Turning EV3 precisely has been a problem. Do you use a certain mat for running EV3 on? Can you tell me what material I need to get the mat printed?
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Why do I not have the Brick Datalog app in the LEGO Mindstorms EV3 V1.10E firmware?
I realize a similar question has been asked (you can view it here) however mine is slightly different.
I have a Lego Mindstorms EV3 Home Set 31313 and due to recommendation, I installed Lego ...
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Is it possible to use 5 motors on an EV3 brick?
The EV3 brick has only four output ports (A B C & D) to run motors. Is there any way to use port 1 (sensor port) to control a motor?
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Can I install EV3 Education software and Retail software side by side?
I have EV3 Retail edition and I like to buy required sensors and build the robots come with the education edition of EV3. I have lots of LEGO Technic spare parts so I expect I can find alternate parts ...
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Why is the EV3 Ultrasonic Sensor (45504) out of stock?
The EV3 Ultrasonic Sensor (45504) has been out of stock for a long time. Is the sensor discontinued due to an accuracy problem?
Is there an alternate version of "Gyro Boy" that works without the ...
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Mindstorms EV3 education 1.4.2 for Windows crashes when opening second project
The EV3 software opens the first project with no problems, but when I open a second project it crashes and terminates.
I tried to install the EV3 software on Windows 10 (MS Surface laptop i7,16GB RAM),...
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How to instruct Mindstorms EV3 from PC conditionally?
I want to direct my LEGO Mindstorms EV3 creature from my PC conditionally (ev3dev, Python). The idea is that the program runs on the computer, collects real-time data from different sources, processes ...
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How to make a Lego Mindstorms ev3 self driving car?
I recently got the Lego Mindstorms EV3 kit. I wanted to make a self driving car, but I got stuck on the building part. I saw another question like this, however it was for NXT and had no decent ...
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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 ...
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EV3 brick not turning on, nothing on display?
Ev3 brick not turning on, nothing on display, just red leds are on, tried 3 buttons not working.
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How can I access the brick id in ev3-g?
How can I access the brick ID ( or brick information) in ev3-g?
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Mindstorms EV3 Spinner factory complete code problem
I recently posted a question about the creation of My Block. Now I have another problem. I have written the code as described in the program description, and double checked it, but it still doesn't ...
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Lego mindstorms ev3 spinner factory problem
I hope you can help me with this. I'm on an education where we practice all stuff about IT. I'm currently working on the Spinner Factory project in the EV3. However, when i looked through the program ...
user10281
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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 ...
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Help with Multiple Motors/Intelligent Bricks and coding/ programming/ daisy chaining
I have built the accompanying robot earlier in the week. I have a challenge where the robot needs to find white/black bricks then store them on a tray and then travel over to another robot and ...
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Function in EV3 Basic
I have been programming in basic for ~30 years. I want a translation of the following code into EV3 Basic:
function index( x , y )
return x + y * ( maxx , + 1
end function
sub look
for i = 0 ...
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Loop interrupt stops all loops, not just the one designated
I have been using loop interrupts for a while, and not had an issue... until now. And it is driving me nuts.
My program has 2 main loops, titled "touch" and "end" with two more nested in the "touch" ...
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Steer with the LEGO Mindstorms EV3
In my workshops I get asked regularly, what the turn option of the default steering block means (see the image).
Obviously, if the turn option is set to 0, the robot is moving forward. A positive ...
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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 ...
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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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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. ...
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EV3 low battery communicate right after startup
I just bought an EV3 and started having battery problems. I am using 6 NiMH 1.5V batteries for my EV3. They lasted for around 10 minutes of work and went flat (that's what the EV3 kept saying but the ...
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The center button does not work on EV3 brick
My son has the Lego Mindstorms EV3 brick. The brick turns on when he pushes the center button, but he can't use it in the menu. What's the problem?
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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 ...
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Is possible to change firmware of ev3 brick?
I bought LEGO 31313 but I would like to change the firmware for education (45544).
1.09H to 1.09E. Is this possible?
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What is a better algorithm for wall following with an ultrasonic sensor?
This wall following algorithm uses the ultrasonic sensor. It has a horrible worst case behavior. Place the robot about 3 cm too far from the wall. Instead of moving closer to the wall, the robot ...
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LEGO Mindstorms Spik3r won't move
I built my Spik3r as usual, but it wouldn't run when I tried to program it. I checked the wheels and the legs and everything seemed fine. I even looked back in the instructions, and redid it. It still ...
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How to pause, and restart (without resetting), a timer block - ev3
We're trying to pause the timer block, and then have it restart at the same time where it left off.
By using the touch sensor in a loop before our timer code we were able to get the text output to ...
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LEGO MINDSTORMS EV3 Can't find MyData Block
While going through the challenges of the Gyro Sensor Investigation I came upon the issue that I do not have the MyData Block (It's a dark blue block with a graph on it) on the coding program. Could ...
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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 ...
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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 ...
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Why won't the loop block in my EV3 program stop?
I am building a robotic hand, and I programmed the finger to close when the touch sensor is pressed, and release when the touch sensor is released. It did that with a loop block -
but when I ran ...
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