Questions tagged [ev3]

EV3 is the current generation of LEGO MINDSTORMS, released in 2013.

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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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1answer
131 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
3
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1answer
1k views

EV3 motor TACHO signal connection. Hardware schematic questions

I'm trying to understand EV3 motor TACHO signals circuit on the EV3 hardware schematic. Please look at the image below. There are two things I can't understand: On the left side, the TACHOA0 input ...
3
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1answer
54 views

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?
3
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1answer
130 views

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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3answers
2k views

Mindstorms crashes when connecting to EV3 with Bluetooth

I am using OS X 10.10 (Yosemite) on a 2011 MacBook Air, LEGO Mindstorms EV3 Home Edition v1.0 and the latest firmware on the EV3 (v1.06H) When I attempt to pair the EV3 with my Mac over Bluetooth, ...
3
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3answers
5k views

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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2answers
3k views

How can I create custom EV3 blocks?

What do I need to create custom blocks and in particular the VIX part?
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0answers
315 views

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 ...
2
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1answer
199 views

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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2answers
163 views

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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2answers
2k views

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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0answers
691 views

Can I use EV3 with a TETRIX motor?

What program can I use to control a TETRIX motor through the LEGO EV3? I've heard that RobotC currently cannot be used for this. Has NI released a Labview version which I can use to control TETRIX ...
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0answers
571 views

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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2answers
193 views

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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2answers
207 views

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 ...
2
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1answer
53 views

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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3answers
3k views

What is a normal range of reading of the Light Sensor using EV3 Raw Sensor block?

EV3 software does not support the Light Sensor. It does support the Color Sensor. The solution is to use the Raw Sensor Block. What is "normal" for raw sensor block readings? I'm getting readings ...
2
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1answer
141 views

What kind of mat do you use for running Mindstorm EV3?

Turning Ev3 precisely has been a problem. Do you use a mat for running EV3 on. Can you tell me on what material to get the mat printed?
2
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1answer
273 views

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 ...
4
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1answer
664 views

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 ...
11
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1answer
7k views

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?
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4answers
6k views

Programming Mindstorms on a chromebook

I know there is no official way to program NXT/EV3 on a Chromebook. But a Chromebook can have Ubuntu installed via Crouton in developer mode. So, is there a relatively painless way to program NXT/...
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1answer
437 views

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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2answers
311 views

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?
6
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1answer
789 views

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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1answer
53 views

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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1answer
300 views

lego mindstorm ev3 education 1.4.2 for Windows crash when open 2nd projects

EV3 open first project no problem, but when I open second project it crash and exit. I tryed install EV3 software on Windows 10 (MS Surface laptop i7,16GB RAM), or on Windows 7 (Thinpad i5, 16GB RAM), ...
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2answers
1k views

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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2answers
624 views

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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1answer
316 views

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 ...
4
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1answer
1k views

Use iPhone camera as an input sensor for EV3

As EV3 has Bluetooth builtin as well as iPhone too, is there a way to connect them somehow so that iPhone could send data from the camera via Bluetooth to an EV3 brick? As a more general question, ...
9
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1answer
4k views

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?
0
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1answer
738 views

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 ...
2
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1answer
358 views

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 ...
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1answer
181 views

Help with Multiple Motors/ Intelligent Bricks and coding/ programming/ daisy chaining

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 transfer the ...
9
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1answer
5k views

How can I rotate an EV3 motor an exact number of degrees using RobotC?

I'm trying to rotate the motor of an EV3 by an angle of 50°. I can't. How I can rotate a NXT/EV3 motor by a given angle using RobotC?
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2answers
247 views

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, how do I write an infinite loop ...
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2answers
264 views

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 ...
7
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2answers
571 views

Mindstorms Software Versions

Here is what I have: Site licences for Mindstorms Software 1.0 (NXT) and EV3. An upgrade to Version 2.0 for the NXT 9 NXT kits 4 EV3 kits 2 Renewable Energy Kits and Temperature sensors My problem ...
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1answer
2k views

What does EV3 stand for?

I am wondering what the official reason behind the name of LEGO's latest MINDSTORMS robotics platform is. What does "EV3" stand for?
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1answer
696 views

EV3 SPIK3R Mission 5 Just keeps backing up

I completely built the Mindstorms EV3 Spik3r. Missions 1-4 worked fine. However, with mission 5, and using the pre-made program, the robot just keeps backing up, instead of facing the bug, shooting it ...
3
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1answer
1k views

EV3 Block problems?

I don't see what is wrong with the way i made my program. It looks like this. The idea is that in the while loop [01] shall the robot move forward until it see something brown. If it see ...
4
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2answers
4k views

Why I get this “message unable to compile some documents for deployment ev3”?

I have a LEGO Mindstorms EV3 program that I was working on for a long time but recently and suddenly when I try to download the program the software displays the following message: "unable to ...
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1answer
883 views

Mindstorm EV3 no longer recognises SD card

I followed the instructions to install leJOS on an SD card, to get Java support for the Mindstorms EV3 brio. The brick detected the leJOS files and processed the whole installation procedure ...
2
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1answer
603 views

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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0answers
210 views

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 ...
5
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1answer
719 views

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 ...
4
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1answer
185 views

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 ...
2
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1answer
161 views

Do we need WiFi Dongle to install Scratch on EV3

I was wondering if I can install Scratch program on EV3 brick without the wifi dongle. Appreciate any insight here.