16
votes
3answers
1k views

How do I build a sloped roof with a 60° rake?

I've seen the sloped roof on the "Winter Village Post Office" and similar using plates, and I want to build a roof with a similar angle: What should I use to ensure they are well attached?
6
votes
2answers
16k views

How do i organize all my LEGO bricks and parts?

I just have a massive amount of lego laying around in a container. Kind of hard to sort through whenever i need parts. I was wondering if anyone has experience with many different sizes of lego ...
12
votes
8answers
2k views

Have any Lego sets been released with errors/mistakes in the build instructions? If not, why not?

I was thinking about the documentation process of a large set like the Death Star and it got me thinking; surely at some point Lego must've released a set of instructions that contained a mistake? ...
16
votes
3answers
4k views

What is the largest Lego kit commercially available?

I believe the Imperial Star Destroyer is the biggest in terms of size, at 58.8 cm by 50.5 cm by 21 cm, and the Death Star in the number of pieces, at 3803. Are there any newer, bigger models?
7
votes
1answer
2k views

Is there a way to convert a 3D model into a lego sculpture?

After researching this question for a few days, I want to post it here so I can share what I learned in an answer, and hopefully learn some new techniques too. If anyone has found another way to do ...
11
votes
4answers
1k views

Can I use the WeDo USB hub with normal Linux distributions?

I haven't found a lot of detail on the WeDo USB hub. Is this device usable with Linux? I found one article that indicated the OLPC XO had support for it, but it implied there was custom support ...
11
votes
3answers
8k views

How to speed up the 4x4 Crawler truck 9398?

Just finished building the 4x4 Crawler and it was a fun build but as a remote control car it is . . . in a word . . . SLOW! I know it's powerful and can climb over stuff but sometimes there is nothing ...
5
votes
2answers
293 views

Is it possible to create a differential if I don't have it as a ready to use element?

I have numerous gears, axis and other elements from different Lego Technic sets. I wonder if using them I can make a kind of a differential like this? If not, how can I implement similar ...
0
votes
0answers
59 views

Parallel Direct Commands to an NXT

Is it possible to send multiple Direct Commands to an NXT brick in a quick succession, and the NXT brick will execute them as soon as it receives them which will look like they are happening in ...
13
votes
2answers
338 views

What software was used to create the LEGO Movie?

So I've just seen the LEGO Movie and I was amazed at the such intricate details of all the minifigures and sets. I was wondering if anyone knows what software was used to create the film. Animal ...
1
vote
1answer
70 views

What do the V# codes represent in the LEGO shop?

The online LEGO shop references products with a V# code at the end, like this: What is the meaning of this code?
2
votes
1answer
153 views

Biggest European LEGO event?

I was wondering if there is a big European event where new sets and custom sets are shown, and maybe deals on sets or pieces, something like an E3 for LEGO or something similar. I looked on Google but ...
29
votes
12answers
39k 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
1answer
130 views

How does cleaning yellowed Lego bricks affect their clutch power?

Will cleaning yellowed bricks (via the retr0brite solution) decrease the clutch power of lego bricks? I've also heard that certain colors of embellishments on the minifigs or bricks do not hold up ...
6
votes
1answer
233 views

Why are 2/3 height bricks with studs on the side 2 studs deep?

This question is regarding the 2/3 height bricks with studs on the side. The two that I am aware of are 99206 and 87609: If you haven't seen them before, these are functionally somewhat similar to ...
16
votes
4answers
4k views

How do you store your built models for long-term display?

My wife and I recently started to re-enjoy Lego and had a lot of fun building the Grand Emporium and a few other pieces but now they're collecting dust and we're lucky enough to have a few spare rooms ...
2
votes
2answers
179 views

On what plane is 6912 Super Soarer based?

The set 6912, Super Soarer, features a yellow jet plane. My first thoughts were towards the Harrier, but it has exhausts on the tail, which the Harrier doesn't have. On what plane, if any, is it ...
2
votes
2answers
384 views

Turn a tank a specific number of degrees

I don't have a gyro sensor so that's not a possible solution (until I purchase one). I figured I'd just do the math on this one. What I'd really like to know are: The circumference of the ...
0
votes
0answers
66 views

Problem in connecting the NXT brick via bluetooth

I am trying to control my NXT brick via Bluetooth but I cannot establish a connection. Although I am able to establish a Bluetooth connection from the laptop to the LEGO using a Bluetooth dongle, the ...
4
votes
2answers
193 views

Can you identify this yellow crane?

Can you identify this one? It's part of a series of models I had as a kid that I want to take apart for my own kids now, and I'm looking for the original instructions.
0
votes
2answers
126 views

What can I do to clean a minifigure's torso?

Well, I have the old Greneral Grievous from 2005, and it is almost 10 years old. So, by the time, it's torso became like yellow-painted. Tell me what can I do to clean it. Please?
1
vote
1answer
357 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 ...
3
votes
1answer
98 views

Battery Acid Dust Issue

I was recently digging through some old boxes looking for old LEGO bricks I had as a kid. In two of the boxes I found old double A batteries that had busted (the boxes were in a building that has got ...
2
votes
1answer
273 views

How to use two NXT bricks for 3+ motors and 4+ sensors?

I need to use multiple bricks in order to use more motors and sensors. I need to read sensor values, and tell motors to move. I've tried using bluetooth, however my attempts haven't been very ...
4
votes
1answer
161 views

Need help fudging a group in 8039

So, I'm building "8039 Venator-class Republic Attack Cruiser ™ Star Wars TM" and I've hit a snag. I need help fudging the instruction from page 76 of book 1 for that set (see picture below). I'm ...
10
votes
4answers
26k views

Is it possible to buy a bulk of 1000s of basic bricks (mostly 2x4)?

Several years ago I remember being able to walk into toy shops and actually shovel lego bricks into a bag and thus buy them in bulk. Unfortunately I can't seem to find stores anymore that offer this ...
7
votes
3answers
4k views

Which LEGO Technic sets include instructions to add the Power Functions accessory box?

Some LEGO Technic sets apparently come with instructions to add a motor, using the pieces from the Power Function Accessory Box (set 8293). Is there a list of the sets which do contain such ...
4
votes
1answer
125 views

Can you identify this model of a yellow truck?

It's part of a series of models I had as a kid that I want to take apart for my own kids now, and I'm looking for the original instructions. Can you identify this one?
1
vote
1answer
519 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 ...
13
votes
4answers
11k views

What was the first set produced by The LEGO Group?

What was the first Lego set produced, and when was it first released?
0
votes
0answers
43 views

Are there any additional robo center downloads for the nxt-g software?

It would be nice if there were additional entries under the animals, vehicles, machines and humanoid tabs. Supposedly there was some official LEGO web component to the software which appears to be ...
7
votes
3answers
379 views

What techniques can be used for laying plates at 45° angle?

I've seen a number of techniques for laying individual elements at 45° angles, but I need a consistent method for laying down larger plates at 45 degrees while maintaining close contact with the base ...
2
votes
1answer
256 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 ...
7
votes
2answers
805 views

Damage Boiling LEGO Bricks

I bought some LEGO bricks from shop on Bricklink and received them yesterday. In order to make sure that the pieces were nice and clean (they were used) so that my two year old can play with them, I ...
3
votes
1answer
60 views

How to minimize the impact of erroneous sensor readings?

A group including myself are using the Lego Mindstorm kit to design a robot that is going to compete in a school competition. However, the sensors aren't as reliable as we would like them to be, ...
4
votes
1answer
735 views

Can I buy an add on educational kit for my retail EV3?

We ordered the retail version of Lego EV3, and my son loves it and wants to do more. Are there any add on kits we can buy to expand upon what we have, ie add on motors or special tech pieces, or an ...
0
votes
1answer
492 views

Should I buy the retail or education version of Mindstroms EV3?

There are other questions that list the differences in the retail and educational version but I cannot judge which one I should buy (educational or retail). I am buying Mindstorms for the first time, ...
1
vote
1answer
330 views

Price of EV3 education software

After looking around on the Lego Education website, I failed to find the price of the education software. I currently have the retail version of the software, but I want the extra features and blocks ...
5
votes
2answers
971 views

Can I change the firmware on a Retail EV3 Intelligent brick to the Educational version?

The LEGO Mindstorms EV3 comes in both educational and retail versions. The educational version differs in bricks, sensors, a rechargable battery and datalogging capability. I would like to know can I ...
5
votes
2answers
278 views

Personal part collection on the web (Bricklink or alternative)

I started using Brinklink a few months ago and although I really like it the interface is terrible. I am looking for a specific feature but don't know if it's unsupported or just I cannot find it. ...
2
votes
1answer
116 views

Retrobrite cleaning on old cellulose acetate bricks?

Is Retrobrite (cleaning with hydrogen peroxide, oxyclean, sunlight) effective or ineffective or, worse, downright destructive on old cellulose acetate bricks? My understanding is that method of ...
3
votes
2answers
351 views

Is it possible to change the OS in the EV3 Mindstorm Brick

I'd like to know how to change the OS embedded into the EV3 mindstorm Brick ( list of it ). For example, would it be possible to replace the existing one by a linux release without losing any ...
6
votes
2answers
339 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 ...
11
votes
4answers
802 views

Is “public transport” train compatable with Lego City track?

Among other things, set 8404 contains a train but it doesn't come with any track pieces (see set 7499). Is this train compatible with these Lego City tracks? I see where it's more of an electric ...
5
votes
1answer
387 views

Small lego train sets on narrow gauge track?

Will Lego sets such as "LEGO Christmas Train" 40034 or "Emerald-Express" 31015 run (manually) on narrow gauge lego track? These sets use a wheelbase that is only 4 studs wide and wheels that have a ...
14
votes
2answers
714 views

Why are they called “minifigs”?

Were larger-scale LEGO figures the standard at some point in the past? It just seems odd to me that they're called "mini" when they're basically the only kind of LEGO figures available (not counting ...
6
votes
1answer
406 views

Lego plate with square holes?

I have some white plates with square holes on the underside. I'd almost think they were some imitation brand if they didn't have lego stamped on the studs. Can anyone tell me the history of when ...
9
votes
1answer
232 views

Which pre-2000 set had a mobile crane with lights?

I had a set similar to this when I was younger (I am fairly sure this was before the year 2000), although: The model was red, rather than yellow. The model was more of a breakdown truck, rather than ...
5
votes
1answer
962 views

Can 10153 9V train motor be powered by the Power Functions Battery pack?

I am currently making the switch to Power Functions with my Lego Train collection and am wondering if I can power the old 9v motors that I used with the metal rails, with a battery box from the power ...
13
votes
2answers
390 views

What kind of metal/alloy were on the old LEGO 9V train tracks?

LEGO's train tracks (the actual rail part) were made from some kind of metal alloy that does not seem to oxidize, and seems to have good electrical charateristics (low resistance). Any ideas what ...

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