3
votes
1answer
53 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.
1
vote
1answer
104 views

Advanced coloured lines following robot

I am trying to build a coloured lines following robot, and I would like to know what kind of sensors do I use for my robot to differentiate and detect several different coloured lines?
1
vote
1answer
114 views

Where can I identify this and get instructions? [closed]

My son tore open this bag and I am going crazy trying to figure it out!
5
votes
5answers
1k views

Factories that could make off-patent bricks?

I'm quite interested in finding a factory that can produce a small-ish run of high-quality plastic bricks that I can use in my classes and possible to re-sell as stand-alone kits. I only need a few ...
3
votes
1answer
223 views

How much torque can a lego axle handle?

from to this question, it seems that the gears are stronger than the axles, which begs the question of how strong are the axles? if you connect one of the stronger motors, such as say the buggy motor: ...
13
votes
3answers
10k views

How do I know when current sets will retire?

As the title asks, how is the easiest way to find when current sets on the Lego website will be retired and no longer sold. For example, the 10197 Fire Brigade has been around since 2009, same as ...
6
votes
3answers
2k views

How much does an average LEGO brick cost to produce?

I know that LEGO bricks approximately sell for 10 cents per piece but what does it cost to make an average brick?
3
votes
1answer
343 views

Does the value of Lego increase over a period of time?

I have a couple of exclusive Lego sets such as the 50th Anniversary set, 10184 Town Plan, as well as the Lego Harry Potter 10217 Diagon Alley set. I was wondering if these will increase in value into ...
0
votes
1answer
64 views

How can I remove fast glue (Cyanoacrylate) from LEGO bricks? [duplicate]

I recently bought some second-hand LEGO bricks. Some of these bricks have quick glue on them. How can I get rid of the glue?
3
votes
1answer
61 views

Basic bricks in Ninjago Spinners sets

Every Ninjago spinner set contains basic bricks of the same color: two 1X2 bricks and a 2x2 flat. See: http://brickset.com/sets?query=spinners What is the purpose for these bricks?
6
votes
2answers
534 views

Has Lego discontinued presenting alternate configurations on the backs of modern boxes?

When I was younger, the backs of my Castle/Space Lego set boxes showed alternate model builds for the supplied pieces, configurations not detailed in the instruction manual. I appreciated these ...
5
votes
1answer
738 views

How to build a limited slip differential?

Lego provides a couple of ways for building a differential, such as this: and also provides a limited-slip gear like this: ...
7
votes
2answers
4k views

How can I build a Lego rubik's cube?

How can I build a LEGO Rubik's cube, I have 2 of them, and I've built them several times, but how can I build a LEGO Rubik's cube.
21
votes
3answers
740 views

How do you plan large structures for easy and safe transport to shows?

Imagine I am building a large display that will cover many square feet and have both tall buildings and lots of small details. What are some techniques for making these things modular? Is it safer to ...
7
votes
1answer
355 views

Which train motor is more powerful, 9V or 12V?

I recently picked up LEGO bricks again and due to lack of space I'm planning to build a multilevel train layout. I do have a descent amount of 12V track along with trains and switch points, but I was ...
3
votes
3answers
2k views

EV3 Brick Error Symbols?

I am currently developing an EV3 robot that sorts colored technic beams. However, the brick will only run part of the program and then generate a strange error code on the brick's screen. The error ...
1
vote
0answers
56 views

Creating electronic product which is compatible with Lego brick [closed]

Currently, my company has an idea to create the product to integrate with your Lego brick. So far, we found that there is a product at kickstarter, mcookie (Link: ...
1
vote
2answers
230 views

I have an idea for a new kind of LEGO, using new types of elements

I have an idea for a new LEGO product (not a LEGO set or anything, I know that the Lego ideas site exists, but a new "kind" of LEGO) I've been trying to contact LEGO about it without any luck. So I ...
6
votes
1answer
218 views

Is there a modern equivalent for windscreen piece 6152?

For a creation I'm building, I am using a white windscreen piece (part ID 6152). Looks like this piece was last produced in the late 1990's. Is there a modern equivalent that preserves this general ...
0
votes
0answers
214 views

Error “unable to open port” in LeJOS EV3 behavior programming

I'm writing a behavior based LeJOS EV3 program. I'm using two sensors: touch and ultrasonic. I'm using two large motors and one medium motor. I'm using a sample provider for the touch screen but not ...
33
votes
13answers
72k views

What glue should I use for permanent LEGO construction?

The incredible precision of LEGO parts makes them attractive for building precise jigs, but the fact that they can come apart fairly easily isn't so helpful for this application. Can anyone recommend ...
2
votes
2answers
132 views

Access WeDo on OS X from a real programming language

I'm trying to talk to the WeDo USB interface from Python or really any real programming language. I tried the clever WeDoMore library, but can't get it to bind the WeDo. I think this is because the ...
3
votes
2answers
252 views

How to run two LEGO electric trains at the same time?

I have a LEGO city built with a train encircling it. The track is the classic style with metal railings running through it. I have a switch track as well that is connected to an NXT robot to switch ...
1
vote
1answer
2k views

How can I use multiple switch options in Lego Mindstorms EV3 software?

What I see is just a simple if/then/else. What I am looking for is to be able to add multiple options, more than yes/no. I use a motor as a switcher, so I rotate it to some position and measure its ...
4
votes
1answer
158 views

Can anyone help id this partial build/set?

I found this partial set bagged at Savers, looked interesting. But searching thru peeron, I cannot figure out what set this might belong to. Is anybody familiar with what set this might be associated ...
17
votes
4answers
11k views

Is Mindstorms EV3 backwards compatible?

LEGO Group announced the next Mindstorms version, the EV3 which will be available in the Fall, 2013. Does anyone know if the new version, specifically the controller, will be backwards compatible ...
1
vote
1answer
222 views

Are 10682 “Creative Suitcase” and 10695 “Creative Building Box” compatible?

I just wanted to be sure if these two sets 10682 and 10695 are compatible.
3
votes
1answer
99 views

Is there a site where I can put in a set of individual lego bricks (by part ID) and get an optimized list of stores to buy (to minimize shipping)

I'm new to this site, so please forgive me if this is a duplicate. Background story I got my 6 years old the Lego City Arctic largest set, and then realized he had previously had 2 other arctic ...
-4
votes
1answer
98 views

How many, and what the names are of all the countries that buy, sell, make, and assemble LEGO? [duplicate]

I'm doing a world geography project over the globalization of LEGO. Eventually I will put everything on a poster. I already know that Billund in Denmark is where they were first made, also Hungary, ...
10
votes
1answer
521 views

How can the 12v Train 7823 Container Depot be used to load container ships as per Lego Catalogue

As I kid I was always confused by the description of the 7823 Container Depot in the Lego Catalogues: ..."The crane can be raised so container ships can be loaded." An example can be seen in ...
6
votes
1answer
192 views

How did the LEGO 7862 Remote Controlled Decoupling and Signal work?

I've never seen this set in person, although it appears occasionally in 12V Lego train system images. I've never seen it used, or described. How did the LEGO 7862 Remote Controlled Decoupling and ...
2
votes
2answers
143 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 ...
14
votes
2answers
1k views

Will playing with a PF train motor by hand damage it?

If one pushes a PF-motorized train by hand, will it cause damage to the motor, or any of the other parts (IR Receiver, Battery box)? It is essentially working as a generator when turned by hand, so ...
2
votes
1answer
103 views

Mindstorms Vision Command - what shall I do with it?

I have a Vision Command camera, bricks and book, still boxed with instructions and a W98 coaster, er I mean CD, and was about to donate it to a charity shop but it seems there's no 64 bit driver for ...
4
votes
1answer
283 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 ...
2
votes
1answer
197 views

Where did these small tan bricks come from?

I was going through an old box of LEGO bricks from the 70's and 80's and I found a number of small bricks that appear to be about 2/3 size. They have the LEGO logo, and appear to be the official tan ...
2
votes
1answer
82 views

Control two Lego NXTs with an Arduino

I'm new here and also very noob with the Arduino. I have a basic knowledge in Java and some more in C# so code isn't a problem. I can learn it easily. I have a project assigned. I would like to know ...
7
votes
3answers
2k views

How to remember initial position of a robot and return to it

I have an EV3 robot with motors, like a car, that can move forward/backward and left/right and have some sensors attached. I want it to remember its initial position by remembering all the movements ...
7
votes
3answers
1k views

How many flexible tracks does it take to make a complete oval?

I have couple of straight tracks, no curved tracks, so the only option now from me is to buy the new 7499 straight + flexible tracks. Therefore: How many boxes of 7499 tracks do I need to make a ...
7
votes
2answers
2k views

Can I repair a broken LEGO brick with glue?

I have a dump truck hinge piece that snapped in half when it got bent backwards too hard. Is there a type of glue that would be appropriate to repair the piece? Would superglue be a good choice? ...
5
votes
1answer
201 views

Where does this green plane fuselage piece come from?

It has the year 2005 on it and the number 22988 I think. Anyone know what it is?
5
votes
1answer
247 views

On what plane is 7292 Propellor Adventures based?

The set 7292, Propeller Adventures, features a twin engine airplane. It looks a bit like the de Havilland Mosquito, but not quite. On what plane, if any, is it based?
5
votes
2answers
142 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 ...
1
vote
0answers
52 views

LEGO Brick Color Palette [duplicate]

Have any new brick colors come out recently? I haven't seen many diverse colors and was wondering if there is still an expanding palette for the bricks being produced.
8
votes
2answers
1k views

Which buildings were based on sets in the LEGO Island video game?

The Wikipedia article for Lego Island mentions 'Most of these buildings are based on real Lego sets in circulation at the time of release for the game.' I haven't played the game in a long time but ...
5
votes
1answer
202 views

EV3 RMIregulatedMotor Regulation Problems

I have problem with regulation of the motor when I control EV3 with Bluetooth. Here is the code: RemoteEV3 ev3 = new RemoteEV3("10.0.1.1"); ev3.setDefault(); RMIRegulatedMotor leftMotor = ...
6
votes
1answer
138 views

What brick is this? 1x2 with holes in the short sides

This is my first time doing something like this, so here goes. this is a 1x2 blue brick, worn from being in my bins with holes on each end: Through a hole, you get this view of what you see in ...
3
votes
1answer
93 views

Official Lego charity programs

Many consumer-oriented corporations have official charity programs where products or money are donated to deserving causes. I was wondering if The Lego Group has any such programs --- and if so, where ...
2
votes
1answer
102 views

How do I make use of the full SD-card after installing ev3dev

After writing the image to the 8G microSD-card, initial setup of network and installation of git (with apt-get) I could not install anything else since I was out of diskspace. This confused me. But df ...
4
votes
3answers
3k views

Invert motor block in EV3

New to EV3 so this should be simple. I would like my simple wheeled robot to go backwards. So I put two invert motor blocks, one for port B the other for port C followed by a move steering block. The ...

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