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EV3 program runs fine when connected to PC but does not respond when copied to the brick

I am building the race car mentioned in the LEGO Mindstorms discovery book using an EV3 brick. The problem I am facing is that the driving program runs fine when the brick is connected to the PC via ...
2
votes
0answers
106 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
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0answers
971 views

2001 BIONICLE Trading Card #255?

This is probably a long shot, but does anyone have or know where to find a picture of the 2001 BIONICLE trading card #255? It's presumably one of the illustrated story cards, and likely features a ...
2
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0answers
62 views

EV3 software crashes when coding color sensor switch, how can I fix this?

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 ...
2
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0answers
131 views

Gonk droid spinning saw blade

This is the Gonk Droid from set 75253 Boost Droid Commander: The accessories for the third mission "defending the Falcon" have been added. The right arm can punch and shoot a "laser beam". However ...
2
votes
0answers
41 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
54 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
74 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
64 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 ...
2
votes
0answers
359 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
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0answers
775 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
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0answers
288 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
399 views

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 ...
2
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0answers
350 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
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0answers
44 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
43 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
155 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
72 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
408 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
702 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?
2
votes
0answers
197 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
369 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
94 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
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0answers
357 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
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0answers
177 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
397 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
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0answers
56 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
219 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 ...
1
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0answers
22 views

Lego Pneumatic Engine: Possible Damage from Baking Soda and Vinegar?

I have a question on Chemistry.SE about secondary reactions producing something other than CO2, and from a bit of discussion there, the answer seems to be that there aren't any, but some of the ...
1
vote
2answers
94 views

Can you identify this torso assembly

Can anyone identify this torso and arms? I did a search on Bricklink for torsos with 'fur' and 'belt' but couldn't find it.
1
vote
1answer
52 views

Online link to the LEGO NXT firmware (v1.31) source code or IAR ARM LEGO development tools?

I am looking for the source code to latest NXT firmware (v1.31). I found the binary image is on LEGO site: https://www.lego.com/en-us/themes/mindstorms/downloads, but no links to firmware source code ...
1
vote
0answers
47 views

SPIK3R can't even hold itself

The SPIK3R does not move properly. When I remove the legs and depend on the wheels it works like it should: goes forward when I make it go forward, and turns when I make it go backward. I did not make ...
1
vote
0answers
43 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
88 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
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0answers
38 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
1answer
342 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
286 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
42 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
37 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 this?
1
vote
0answers
60 views

Custom extension cables for Light Stax?

Recently, I got the S-12012 Light Stax kit with 50 (!) light bricks. They are different from those described in this question, but they are much cheaper, colorful and with blinking/pulsating effects. ...
1
vote
0answers
52 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 ...
1
vote
1answer
141 views

Where's the iNXTG app for programming NXT from iPad?

I'm trying to find the old iNXTG to program NXT bricks via iPad but it is no longer available in the Apple Store. Does anyone know if there exists an archive for programs like that? The problem is ...
1
vote
0answers
99 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 ...
1
vote
0answers
506 views

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" ...
1
vote
0answers
38 views

Help regarding importing into LDraw

I just have a quick question regarding importing an .obj file into LDraw. I originally put a an .obj file through Brickr and exported as an .obj. Now, I want to import into LDraw in order to visualize ...
1
vote
0answers
70 views

Is there a way to move items from quote back to basket?

I requested a quote on a set of parts. Got it, it was too expensive in terms of shipping, but it turns out I had only 18g of parts, when shipping would cover up to 100g. Is there a way to move parts ...
1
vote
0answers
238 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 ...
1
vote
0answers
137 views

myblock for a proportional gyro turn that randomly fails when in a larger program

I have a proportional gyro turn myblock that fails when played in a longer program. The myblock works perfectly fine when played by itself. The most confusing thing is that the way it fails seems to ...
1
vote
0answers
983 views

LEGO Mindstorms EV3: Camera recommendation for line tracking

I am planning to build an autonomous car in LEGO Mindstorms that will use ultrasonic or infrared sensors for collision avoidance and in the future also a camera for line tracking. I am now wondering ...

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