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127 questions with no upvoted or accepted answers
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814 views

Sending Gcode to LEGO mindstorms x/y plotter?

I am building an x/y plotter out of LEGO Mindstorms. I would like it to read an SVG file on the EV3 brick, convert it to gcode, and draw the coordinates. How would I go about doing this?
3
votes
0answers
707 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 ...
3
votes
0answers
536 views

RCX 1.0 downloaded firmware successfully with RIS 2.0 but does not run any program

I have installed correctly the RIS 2.0 in an old laptop running Windows XP and I successfully downloaded the firmware through the RIS 2.0 to the RCX 1.0, following the standard setup instructions. ...
3
votes
1answer
197 views

EV3 Rapt3r's head cable interfering with slithering

My Rapt3r is working great, except that the cable that goes from the head to the "Intelligent Brick" physically interferes with the slithering on the side on which it is plugged (port 4). Physically ...
2
votes
0answers
23 views

What electronics are inside the Spike Prime motors and sensors?

Is there any information available about the internals of the SPIKE Prime (SPIKE Essential) sensors? What Hall-Sensor is used by the SPIKE motors ? To be more precise: I'd like to get information ...
2
votes
0answers
43 views

Who and where manufactured these “MIDO” bricks from the 80s?

I own a decent amount of these “MIDO” bricks, I thrifted them with a bunch of official Lego bricks from 1980s sets. I’ve done some research and found nothing on the brand. They are actually great ...
2
votes
1answer
169 views

Motorizing Crocodile Locomotive set 10277 - are there any sets that include hub & motor I need?

Crocodile Locomotive can be powered up by using 1 x 88009 and 1 x 88013. Reviews on hubs and motors strongly suggest it is better, financially, to buy them as part of the sets, not separately. Is ...
2
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0answers
65 views

NXT 2.1 And Windows 10 V2004

Has anyone had any luck installing the NXT 2.1 software onto a Windows 10 PC running V2004 19041.1052 build? I keep getting an error: This publisher has been blocked from running software on your PC. ...
2
votes
1answer
86 views

Robot Inventor Bluetooth not working

A while ago, I started up the Robot Inventor program and noticed the computer was not connecting. When I clicked the "Connect" button, the loading "circle" simply started spinning ...
2
votes
0answers
179 views

How to get Lego Mindstorms EV3 expansion set (45560) programmes in Scratch

I bought recently Mindstorms EV3 expansion set (45560) and found out that the available programs are written in old LabView-style programming language: https://le-www-live-s.legocdn.com/sc/media/files/...
2
votes
0answers
132 views

Lego Mindstorms Software: "Error code: 4"

After updating my EV3 Brick's firmware from V1.09E to V1.10E and reinstalling the Teacher Edition of the Lego Mindstorms EV3 software (even though I'm not a teacher), I decided to recover my Brick's ...
2
votes
0answers
168 views

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 counter clockwise to one another (if one plays ...
2
votes
0answers
43 views

LEGO Event in Fountain Hills Arizona

I'm trying to find documentation for a special event that Lego did in Fountain Hills Arizona. I believe it was in the time of LEGO Power Miners and the castle series. They had a tent set up and had 4 ...
2
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0answers
66 views

EV3 Ultrasonic Sensor programm

How can I download the ultrasonic sensor and open it? I want to open it on a laptop running Windows 7. Which program must I download?
2
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0answers
71 views

Makeblock and LEGO PF cable synthesis

My 10yo son and I have ventured into the realm of taking our LEGO hobby up a notch with robotics. We have built the makeblock mbot and adapted LEGO bricks and want to incorporate the Power Functions ...
2
votes
0answers
86 views

Narrow gauge train wheels metal axle?

Anyone know some way, (or someone that makes a mod) to make narrow gauge wheels that actually roll fast? Something similar to the metal axle trucks that are used for standard gauge trains.
2
votes
0answers
787 views

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. ...
2
votes
0answers
887 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 ...
2
votes
0answers
398 views

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 ...
2
votes
0answers
357 views

Is there an leJOS simulator for EV3?

I found this but this seems to be using their own library to control the EV3.
2
votes
0answers
46 views

NXT Mindstorms software glitch

My FLL team was doing some practice programming exercises this morning. One group wrote a program using color sensors, no issue. The next group opened a new program window and attempted to open a ...
2
votes
0answers
46 views

How can I read NXT logfiles?

I used the logfile feature to collect light intensity values. How can I get a view to this data? On the NXT brick I only found: "delete" or "send" but not "show". I tried "send" when I had an USB ...
2
votes
0answers
158 views

Reading NXT Touch Sensor with Monobrick Communication Library

In my program, I need to detect if a touch sensor is activated. Here's some of my code: var nxt = new Brick<Sensor, Sensor, Sensor, Sensor>("usb"); nxt.Connection.Open(); nxt.Sensor1 = new ...
2
votes
0answers
1k views

Bluetooth connection to EV3 from Java on Linux/Android

I would like to connect to my EV3 from PC (and then Android) via Bluetooth. I was able to connect to NXT with LEGO-MINDSTORMS-MINDdroid which uses direct LCP commands but as far as I know the ...
2
votes
0answers
78 views

How to pass an unknown type as a function parameter in NXC?

I was trying to do it as in a regular C, with void*, but it didn't work. Is it possible to pass it in NXC? If it is- how to do it?
2
votes
0answers
490 views

LEGO Model to 3D Converter

I've created a LEGO figure using a great number of ball joints for maximum flexibility. The pre-finalized version of this model, before I got the legs working the way I wanted them, is shown in this ...
2
votes
0answers
209 views

NXT (NXC) Programs are too slow

I am using Bricx Command Center to write some NXC code for a side project. I am working with the MindSqualls C# Library in Unity and am trying to figure out some ways to use the NXT robots in an event-...
2
votes
0answers
376 views

How to determine orientation of a EV3 gripper?

I have built the EV3 Gripper using the manual. I am programming an ev3 brick using ev3dev. I need to determine the angle/direction/orientation of the robot programmatically, before I can issue a ...
2
votes
0answers
99 views

HiTechnic Color Sensor analog

HiTechnic sales support said that HiTechnic color sensor hasn't been manifactured yet. Currently it's out of stock in HiTechnic shop. Is there any analog of this sensor except NXT/EV3 color sensors?
2
votes
0answers
374 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
188 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 ...
2
votes
0answers
400 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?
2
votes
0answers
59 views

Block Platform parameter is not instantiated in Simulink

I used Simulink to write a program for LEGO Midstorms NXT. I can post the design if needed. The problem is that when I want to run it on hardware, it gives the following error: Lego mindstorms NXT ...
2
votes
0answers
226 views

After adding a MyBlock icon to the EV3 palette of MyBlock icons, how can the new icon be associated to an existing MyBlock?

After following the advice given in adding a MyBlock icon to the EV3 palette, can the icon be associated to an existing MyBlock? Something better than copy/paste the contents of the existing MyBlock ...
2
votes
0answers
989 views

NXT software V2.1 runtime installation error in windows

My system configuration: Windows 7 Home Premium 64-bit Service Pack 1. When I try to install NXT software v2.1, I immediately get the error below: Microsoft Visual C++ runtime Runtime Error ...
2
votes
1answer
828 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 ...
1
vote
0answers
95 views

Can anyone identify this Hasbro part? 2x2 circle with a ball on a short bar

Description: A 2x2 round tile with a ball sticking out in the middle of it, the ball being slightly smaller than a LEGO axle with ball. I’ve searched Bricklink extensively before, and the brick has ...
1
vote
0answers
120 views

Mega Bloks identification

Does anyone know what sets these packs of mega bloks are from? These were mixed in with Lego that I brought.
1
vote
0answers
100 views

Technic 4x4 crawler questions

I have the Technic 4x4 Crawler 9398 fully assembled and in working order, but the rear U-Joint sheared itself in half during normal use. I have a replacement piece but now I can’t get the wheels to ...
1
vote
0answers
145 views

Authentic LEGO legs and the Lego imprint

I've gotten a pair of minifigure legs new out of the box with no 'LEGO' logo on the underside of the top of the foot a while ago. I've purchased new pieces where only one leg is imprinted. And as of ...
1
vote
0answers
196 views

Strange blocks appeared in my program

In my Mindstorms program, I found these strange blocks. They appeared when I sent this program to my other PC on Windows 10, which is more powerful. They don't work and I can't change them. Mindstorms ...
1
vote
0answers
49 views

EV3 menu tabs occasionally vanishing

When I say "EV3 menu tabs," I'm referring to this part: And sometimes it disappears, just like the title says. After testing the EV3, I concluded that there are certain circumstances where this ...
1
vote
0answers
432 views

Bluetooth connection between EV3 brick and MacBook Pro fails after 2 seconds

As I was adviced, I searched for same questions before posting mine but although some are similar, I can't make their answer useful for my problem. I have a Mindstorms EV3 Education brick and a ...
1
vote
0answers
113 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?
1
vote
0answers
73 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 ...
1
vote
0answers
931 views

How do you make a custom Lego piece/figure?

I have googled this countless times and there just isn't anything close to what I want. I want to be able to print and design pieces: minifigure accessories, minifigure designs, pretty much make my ...
1
vote
0answers
82 views

NXT not updating, "Cannot locate NXT device to download firmware!"

I am using a Bluetooth connection trying to update firmware from 1.05 to 1.31 and it displays the message: Cannot locate NXT device to download firmware! My NXT works fine other than that. I got ...
1
vote
0answers
62 views

Create/edit subvi's in ev3-g (labview) developer mode

How can I create/edit subVIs in the ev3-g developer mode? I can open ev3-g blocks in the "LabVIEW" mode and Display subVI Details, but not edit or create subVIs itself. Any idea how to do ...
1
vote
0answers
113 views

Why are Printed Lego Catalogues Distributed Late?

Today is January 29, 2019, and toy stores in Germany (at least a couple that I've checked) still have only some remainders of 2018 July - December catalogues. 2019 January - June catalogues are ...
1
vote
0answers
117 views

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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