2
votes
1answer
933 views

How can I transmit horizontal torque to vertical?

I have a setup where I have a step motor which I am attaching a gear onto. The motor will make the gear stand horizontal in a small vehicle. Is there any good gear combinations of LEGO gears that can ...
4
votes
3answers
469 views

Why are some seemingly simple sets, so expensive?

My son has fallen in love with the Lego City series. Alas, I let him watch a YouTube from the video game, and as we look to reward good behavior with reasonable sets, we are seeing very odd price ...
4
votes
3answers
175 views

Are all stickers on a sheet used or do you sometimes have spare? Dino HQ set 5887

I built Dino set 5887 recently, but the sticker sheet contains one extra sticker: one of the 'D' things, the pentagram one. One went on one of the walls, the other two round 'D's went on the chopper. ...
4
votes
1answer
242 views

How many standard 2x4 LEGO elements are produced in a single 2x4 mold injection?

Just how many standard 2x4 LEGO elements are produced from a single mold injection? I realize the molds are used over and over again, but how many bricks does a 2x4 element mold produce at a time?
7
votes
2answers
773 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 ...
5
votes
1answer
278 views

What is the purpose of the hole in the 12 x 12 boat bow (6051)?

I recently received Renegade Runner (6268), and I noticed that it has a somewhat awkward hole in the bow: The main bow piece has a hole for some reason, but I'm not sure what it is for. Here's the ...
10
votes
2answers
1k views

How is the LEGO plastic different from Megablok plastic?

It's obvious that LEGO has better quality control, but what about the plastic they use? Megabloks look cheap and the parts seem to vary in color in a side by side comparison next to LEGO brand ...
4
votes
1answer
252 views

Motor, receiver and battery combos

What combination of motor/Receiver/battery boxes are possible/supported? example: 2x XL motors, 1x M Motor, 1 light using 1 receiver and 1 battery box.
2
votes
0answers
218 views

Ideas for large NXT projects [closed]

I currently have 6 NXT sets. Can anyone think of some large scale projects that I could attempt using most of the NXT bricks and pieces together?
1
vote
1answer
2k views

How can I get replacement stickers for a new lego set? [duplicate]

I recently bought a Lego Fire Boat (set number 60005) but for some reason, when I opened the box and shook out the contents (as I normally do) no sticker sheet fell out. I was wondering if you could ...
5
votes
1answer
342 views

How should I connect two LEGO cylinders with pistons to measure the movement caused by sea waves?

As part of a school project I need to make a model of a snake electricity generator. I would like to build this with LEGO elements, and for that, I need to measure the movements of the cylinders ...
5
votes
1answer
345 views

NXT motors not moving?

I've been looking around the net for a solution to this problem, to no avail. After taking my NXT v1 out of storage, I tried using a motor, but it sortof just, moves back and forth once, then ...
2
votes
1answer
412 views

Which LEGO boxes are compatible?

TLG has produced a number of sets which come in reusable plastic boxes. I'm curious to know which of these are able to be easily stored together. Primarily, I'm wondering which boxes can be stacked, ...
5
votes
1answer
504 views

Is this antenna a LEGO piece?

I came across this piece while sorting: It appears to be similar to 2569, but it's clearly a different part. 2569 doesn't have the ridges and has a spherical tip rather than the cylindrical one on ...
5
votes
2answers
276 views

Technic 8071 assembly problem

I am busy attempting to assemble Technic 8071, and have encountered a problem. On page 83 of the first manual, a yellow gear (4203493) together with a grey splined rod (4211815) is added to the ...
8
votes
2answers
578 views

Which resolution is necessary to print bricks with a 3D printer?

I would like to print LEGO compatible figures. Which resolution is required for the 3D print in order to firmly fix the figures on LEGO bricks?
6
votes
2answers
257 views

Does the jumper plate have a Danish nickname?

Does the "jumper plate" (1×2 plate with centered stud) have a Danish nickname like the "Erling"? Who is the designer of this part? And does there exist a catalog of designers of specific bricks?
6
votes
2answers
579 views

How can I find the value of a LEGO set over several years?

Bricklink has this handy feature on its site which allows you to view the average selling prices of a particular set based on previous auctions. I like this feature, but unfortunately, it only ...
13
votes
3answers
945 views

Why are Lego sets put in such big boxes?

I am wondering why Lego puts sets in big packages. All bricks are put in small plastic bags and from my experience the packaging could be at least half of what it is. There is so much told these days ...
10
votes
3answers
357 views

Any reasons for the introduction of the new-style raised arch?

The new-style raised arch (to the left, 92950) got introduced in 2009, and has been gradually replacing the old-style arch (to the right, 3455) across the board. However, after four years, not only ...
4
votes
1answer
284 views

Is the Antikhythera clock design available as Open Source?

After reading and watch the video about the Antikhythera Clock, I am curious if the design reference (or better yet the instruction manual) is available as OpenSource. Why? Because it would be cool ...
7
votes
1answer
360 views

What is the true angle of a cheese slope?

What is the true angle of a cheese slope? Bricklink lists it as "Slope 30 1 x 1 x 2/3" while LDraw and Peeron list it as "Slope Brick 31 1 x 1 x 2/3". Why do these sources disagree, and what is the ...
1
vote
1answer
2k views

What are the size of Lego Technic Parts?

I'm creating a LEGO Mindstorms catalogue for a school project. I measured the LEGO parts and I made an average size. My goal is to create new parts with a Rapid prototyping machine and I wanted to ...
5
votes
5answers
785 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 ...
11
votes
3answers
441 views

Why can't I reproduce this SD card box in LDD?

I've built an SD card box a few years ago. Now I am trying to reproduce it in Lego Digital Designer. However when I tried to reproduce the closed version, LDD refuses to snap it in place. In ...
4
votes
1answer
174 views

Set to run a program within another program using NXT-G

I'm using NXT-G to program my robot to do few tasks autonomously for so many possibilities. When using C programming, we can call a function from different file into the main program. So, I wonder if ...
6
votes
1answer
248 views

Old Lego movies

As I remember, it was about 1990 maybe some years earlier, there were movies, made by Lego, they were about 3 minutes long, maybe longer. It was of course not computer-generated videos but normal, ...
10
votes
4answers
667 views

Why are there “unique” characters in many sets?

When I was young, about 30 years ago, I'd had no problem to have two policemen, two yellow astronauts or knights. Then I had some lack of Lego sets and didn't know what was happening on this field. ...
8
votes
3answers
2k views

How to make a conveyor belt with LEGO parts?

I am making a small robot with an Arduino and Technic LEGO powered by stepper motors. I am planning on moving small rocks throughout my machine. Does anyone have an idea of what kind of Technic LEGO ...
3
votes
1answer
257 views

NXT Bluetooth “Failed!” when turning on

When I attempt to turn on my bluetooth, the response on the display after about 5 seconds is "Failed!" Then I'm sent back to the main menu. I've reset the unit and updated to latest firmware (1.31) ...
8
votes
1answer
260 views

Can I take an old LEGO winch apart?

I have an old LEGO winch that looks like #73037 It has been "restrung" but it is very stiff and it looks like it has some of the old string stuck between the rotating and non-rotating parts. It ...
8
votes
2answers
576 views

Colouring bricks with the sun

This question is related to How do I change the color of a brick? and the exact opposite of How to minimise or remove sun-stains/fading from blocks? Is it feasible to artificially age bricks in ...
3
votes
1answer
132 views

Setting priorities in LEGO NXT Programmer

For a sumo bot competition I made a robot that has a perfectly functioning ultrasonic senor. However, when I made a second branch on the program for a light sensor, I calibrated the light sensor and ...
5
votes
1answer
629 views

How to make custom LEGO signs, newspapers, etc. [closed]

I have several ideas, but I am finding it hard to get started. What I am interested in is making my own decals for signs, newspapers, artwork for the walls and others. So far I haven't had any luck. ...
12
votes
3answers
478 views

What are the essential resources for learning the fundamentals of LEGO building?

After years of buying and building LEGO sets, my six-year-old son is tearing through the first level of the Master Builder Academy. He's fascinated by micro-building, and generally seems liberated ...
4
votes
1answer
1k views

How hard is it to get a job within the LEGO company, straight out of university as a graduate?

How hard is it to get a job at the LEGO company? Being fresh out of university as a graduate of mathematics, I'm specifically interested in answers on if and how LEGO hires graduates.
5
votes
1answer
451 views

Strongest gear configuration

I'm building a (what I hope to be) high-speed car using two PF-XL motors together and some gearing up. However, there's a point where I have to rotate the axle with power (that comes from the 3 speed ...
2
votes
0answers
328 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. ...
6
votes
2answers
302 views

Ultrasonic problems with the red and blue balls?

I'm still new to NXT, I try to make the robot locate a ball using the ultrasonic sensor, while there I should be in a square area marked by white color. How can I make the robot locate the object (by ...
3
votes
3answers
211 views

Options for sorting old and new versions of colors

I'm working on sorting my LEGO collection. I'm sorting by part then color, with colors mixed when it makes sense (e.g. black is separated out, but medium blue and dark red are together). I'm trying to ...
5
votes
1answer
512 views

Best sensor for balancing inverted pendulum

I want to build a balancer for an inverted pendulum. Which of the following sensors is best suited for detecting the tilt? Accelerometer Gyroscope Angle sensor
5
votes
1answer
214 views

Why does the pin recess on the Technic turntable continue to the edge of the part?

Here's the part in question (2955): While Technic parts typically have a recess to allow the ends of pins to be flush with the surface, this part (and perhaps others) carry this recess all the way ...
10
votes
1answer
239 views

How to remove printed decoration

This is probably heresy, but how can I remove the printed decoration on a brick? I managed to buy a large number of bricks with an eye decoration cheap and found that rubbing a long time with ...
8
votes
1answer
746 views

Why was the 1x1 round brick changed?

The first 1x1 round bricks had no lip, just like most bricks: Brick, Round 1 x 1 Old - No Bottom Lip A lip was then added: Brick, Round 1 x 1 Solid Stud Why? Later, a hole was added in the ...
2
votes
1answer
367 views

Easy way to get the weight of a Bricklink order

Is there an easy way to estimate, to the nearest 100 g (or so) the weight of a shopping cart in Bricklink so that I can estimate the shipping charge (sellers may quote ranges such as "250 - 500 g: $X, ...
4
votes
1answer
212 views

How can I make a mosaic from a given number of 1x1 bricks and a picture?

This question is similar to How can I convert an image's pixels to actual LEGO colors? except that I need to fit a certain number of bricks of a certain colour. For example, I have 20 white, 28 ...
5
votes
1answer
382 views

Is there a place where you can buy single pieces of LEGO-compatible systems?

I've acquired a set of MegaBloks and was amazed at the slopes with studs on top. Unfortunately the set is $15 and there's only 6 pieces I need. So I wanted to ask, are there any sites like Bricklink ...
11
votes
4answers
1k views

Is it legal to sell your mocs?

First off, I assume that it's legal to sell used LEGO bricks and it's also legal to sell self-made LEGO instructions and parts-lists. As far as I know, there are people selling LEGO sets of their ...
1
vote
1answer
447 views

Does the LEGO company actively follow or copy clone bricks?

What does The LEGO group do to follow clone brands? Do they buy at least one of every set produced by The Other Guys? I'm more interested about what the LEGO company does to keep up with what ...
7
votes
3answers
3k 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 ...

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