Questions tagged [ev3]

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

Filter by
Sorted by
Tagged with
0
votes
4answers
3k views

Every time Robot is launched (without changing the code) it is not following the exact path

I'm working on FLL mission and every time our team launches the robot (without changing the program, and we are making sure that it is starting from same location every time) it is not following the ...
1
vote
1answer
299 views

Site or example project / downloadable programme resource anywhere for the EV3 mindstorm?

There seems to be lots of available examples for the NXC version, but I can't find anything for the EV3. I thought that there would be a load of example project files with the software but there's ...
2
votes
1answer
126 views

Sizesorting machine

I am quite new to LEGO Mindstorms, and can't seem to wrap my head around this one. I am making a size sorting machine, sorting brick sizes depending on the time they take to pass the lightsensor. So ...
2
votes
1answer
274 views

EV3 Programme won't load to brick

I have installed EV3 on my PC and am trying to load a program into an NXT 1 Brick. When I click the down load button on the EV3 screen the Brick beeps twice and the program does not load. What am I ...
5
votes
5answers
4k views

Does the Mindstorms EV3 software run on OS X El Capitan?

El Capitan was released a few days ago, and I want to upgrade. Will there be issues with the software, or will it run nicely on El Capitan? My Mac: Retina MacBook Pro 13", Early 2015
2
votes
0answers
345 views

What are the steps in installing the EV3 block developer Kit?

I've downloaded the block developer kit. How do I incorporated into my Mindstorms software?
2
votes
0answers
145 views

Unable to turn on the EV3

I just can not turn on the EV3 with the SD card. I only turned on it twice. The EV3 stops at [-leJOS EV3] UI and does not go to the next step. I charged the battery, reinstalled the software inside ...
3
votes
1answer
386 views

Mindstorms EV3 3D building instructions no longer working in Chrome

Lego Mindstorms EV3 building instructions in 3D (so that one can rotate the model around and stuff) are available. This used to work fine on my machine in Google Chrome. However, I can no longer get ...
3
votes
1answer
460 views

No response when controlling the Mindstorms EV3 brick over Bluetooth

I am trying to control the EV3 using direct commands over a Bluetooth connection. There are no issues pairing the brick with a PC or phone, and opening the serial connection works fine, but sending a ...
2
votes
1answer
1k views

EV3 with NiMH batteries

Could I use 6 NiMH 1.2V batteries and keep pressed the small black circle in the battery compartment in order to adjust the battery gauge and low battery alarm?
4
votes
1answer
592 views

Why can't I combine a EV3 Motor with a Technic frame in LDD?

It is easy and stress-free to attach a frame to a large motor in a vertical or horizontal manner as shown in the picture in real life. But I can't do the vertical version inside LDD. Anyone knows why? ...
1
vote
1answer
683 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
votes
1answer
243 views

How to measure green/blue reflected light on EV3?

As I know there is no way to turn on green/blue reflected light on EV3 color sensor. Is there a way to do it using NXT color sensor and EV3 controller? Or the only way is to use NXT controller ...
1
vote
1answer
2k views

pc program to receive data from EV3 via usb/bluetooth

I'm looking for a library to create a desktop program. It should receive a data from EV3 brick programmed by standard EV3 software. Currently I consider 2 approaches: 1. EV3 brick sends a bluetooth ...
9
votes
2answers
624 views

Making an ATM with an EV3

I am building an ATM using my LEGO Mindstorms EV3, but I ran across a problem. The problem is that I want to be able to input the amount of money that I want to get out of the ATM but I can only have ...
1
vote
1answer
183 views

Education EV3 Software Site Licence - installation on teachers computers?

WE've recently purchased some mindstorms ev3 education sets plus the site licence of the Software. in Switzerland many teachers do their preparations at home, so my question is, am I allowed to ...
1
vote
0answers
62 views

What's the first block in MoveAbsolute for programming the T-Rex, in The LEGO MINDSTORMS EV3 Laboratory book? [duplicate]

On MoveAbsolute2 and 1 for The LEGO MINDSTORMS EV3 Laboratory book by Daniele Benedettelli, programming the T-Rex, I don't know what the first block is, can i please have help?
0
votes
1answer
1k views

Color Sensor/hi-tech and EV3

I want to create a line follower by EV3 using hi-tech color sensor without using switch! :( I tried some former ways but the robot cannot follow the line very well! can anyone guide me?
1
vote
2answers
77 views

EV3 - At what time DIRECT_REPLY is sent by brick?

For example: I've sent DIRECT_COMMAND_REPLY to rotate the motor for 720 deg. When EV3 brick should send reply: before motor finished rotation (right after my command was received) or after motor ...
0
votes
1answer
467 views

Can i change the way the ir remote works?

I bought an EV3 and the first thing that I want to do with it is control models with the remote. I finally discovered how to do this after a long search. It can control the Formula EV3 racing car ...
2
votes
0answers
393 views

How do I control one EV3 using another through bluetooth and LabVIEW?

I have LabVIEW 2014 and I'd like to control make one EV3 move forward using another through bluetooth using LabVIEW, and I don't want to have to use the computer as a relay. How do I do this?
1
vote
1answer
4k views

Is it possible to change the language in the EV3 Education software?

I have only 1 language in menu "Edit - Change language": Is it possible to add another language packs to EV3?
1
vote
2answers
1k views

EV3 brick freeze during run big program

EV3 brick sometimes freezes while executing huge programs and do not react on buttons and bluetooth (connect, start/stop program). Only way to continue work is hard reset. We discovered that freeze ...
1
vote
1answer
977 views

EV3 IR, ultrasonic senosor datasheets

I want to connect EV3 IR and ultrasonic sensors to my Arduino. Unfortunately could not find any good documents describing how to use/control them. Could you please help? Thank you very much.
6
votes
2answers
2k views

What are the differences between NiMH and Alkaline batteries for the EV3?

Currently I am using six rechargeable batteries for my Lego Mindstorms EV3. A few seconds after I start a motor the EV3 gives a notification that that the battery is low. I know that good batteries ...
2
votes
1answer
3k views

EV3 turning in circles

New programmer feeling my way around. I set the most simple "steering block" to 25, the power to 50, and the number of motor rotations to 40 or 50. Then I let it run expecting the bot to go in a ...
3
votes
1answer
658 views

How to read the EV3 display

Is there a users guide or something similar that describes in detail all the images that one sees on the display? There seems to be a lot of stuff there, but no explanation.
2
votes
1answer
2k views

usage of ev3 ultrasonic sensor in lejos behavior based programming

I'm using ev3 ultrasonic sensor. And I'm writing a behavior based lejos code. I want to do some tasks when the ultrasonic sensor detects an object which is not further than 30 cm's. And this is my ...
6
votes
1answer
1k views

Slow down the mindstorms EV3 motor so target position is not overshot

I have Debian jesse installed on a mindstorms EV3 and I'm using the ev3.lego library: https://github.com/topikachu/python-ev3 I want to be able to slow down the motor as it reaches its target ...
3
votes
1answer
216 views

Using the NBR 1036 Barometer with the EV3

I just purchased the HiTechnic Barometer from LEGO, thinking the Block was available for the EV3. Theory says that I can use NXT Block in the EV3. Can anyone point me in the right direction?
2
votes
3answers
3k views

The Mindstorms EV3 Software crashes on OS X Yosemite 10.10.3. What do I do?

It's crashing on startup which is really irritating. When debugged with terminal it says this: Unhandled Exception: System.UnauthorizedAccessException: Access to the path is denied. [ERROR] FATAL ...
2
votes
2answers
497 views

Inverting motor's rotation

I've designed a robot with two motors. It works as follows: The first motor is attached to the the person's arm, the second motor receives the calculated movement and moves accordingly. When the ...
7
votes
2answers
566 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 ...
7
votes
0answers
192 views

Where does the EV3 software store its crash reports?

I cannot find where the crash reports generated by my EV3 software are stored. I have looked where it tells me to, but I can't find any.
3
votes
1answer
2k views

What RGB-values do I get from the colorsensor

I have the extra colorsensorblock used by mindcuber - ColorSensorRGB - installed. Now I'm trying to use it in my own projct. But what values does it produce? It seems like it has a min-value of 0 (as ...
4
votes
3answers
4k views

Could I do datalogging in Mindstorms EV3 Home edition?

Apparently datalogging is an integrated part of the educational EV3 software. But I got the Home edition. Is there some module or thing I can use to get datalogging functionality in my Home edition? ...
2
votes
1answer
240 views

Can I identify the colour of objects 5mm in diamater with an EV3 Colour sensor?

My plan was to make a simple robot to sort beads like this:. Its the Hama Medium size beads, they have a diameter of 5mm so they are fairly small. After some testing, reading and asking here I figured ...
9
votes
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?
5
votes
1answer
947 views

Custom EV3 Block: “Unable to compile…” (“string subsection”)

I am attempting to make a custom block according to the EV3 Block Developer kit (found here). I was able to create a simple block that returns the length of a string. This is what it looks like: (The ...
6
votes
2answers
3k views

Have Multiple Inputs to Programming Block

Originally, I had a simple program to move until the robot hit a wall, then it reversed and turned and moved again, repeated to infinity. It works by turning the motors on, waiting for input from the ...
2
votes
1answer
221 views

Tufts MAZE LabView Program Will Not Run on EV3

Through the 2012 LabVIEW for LEGO software package, I found an example of a maze from Tufts. I cannot get it to run on an EV3. It appears to just constantly execute the initialization. How can I ...
3
votes
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 ...
9
votes
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?
2
votes
1answer
810 views

How can I use bluetooth on my phone to run a program on the EV3 brick?

I tried the Commander app but it seems to just let you control individual motors. I would like to run the various programs I have made using an input on the phone through Bluetooth Is this possible ...
3
votes
2answers
361 views

Can a EV3 program run simultaneously with the Running Robot commander app?

Is it possible to run the Robot Commander app and a program on the EV3 brick at the same time? If so how would it be accomplished?
5
votes
2answers
1k views

Is it possible to use Bluetooth to connect two EV3 bricks using RobotC?

For example to send a numeric value from one to the other?
4
votes
1answer
1k views

EV3 controlled by 8879 speed control through IR sensor

Is it possible to send commands to an EV3 brick from the Power Functions Speed Control remote? Would I have to interpret the raw sensor values to do this? Are there any references that would help?
1
vote
1answer
861 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 ...
3
votes
1answer
1k views

Programming The Lego Mindstorms T-Rex from EV3 Laboratory

I bought the book The Lego Mindstorms EV3 Laboratory fron Daniele Benedettelli. I buid the T-Rex chapter 15 and when I tried to programming the T-Rex (chapter 16) I have a problem. I'm not able to ...
3
votes
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 ...