12
votes
1answer
1k views

What is this black brick with red tubes inside?

In an old plastic bag with heterogeneous Lego bricks, I found three or four like this. I can't recognise them: does anybody know what they are? In which set(s) were they used? What for? A few more ...
12
votes
4answers
1k views

How to unplug black friction pin connectors

Black friction pin without slots connectors are common in older Technic sets. Note that these were quickly replaced by the current version with slots that is much easier to remove. vs Especially ...
12
votes
1answer
793 views

Is it safe to overload LEGO train motors?

When I was in Fana'Briques in 2008, there was a speed record competition for TGV-themed train. The setup used a section of custom-made straight track (aluminium rails if I remember correctly) and was ...
12
votes
2answers
388 views

Difference between LEGO Castle and LEGO Kingdoms

Can anyone explain what the difference is between LEGO Castle and LEGO Kingdoms. I don't understand why they are not in the same product group. Also LEGO Kingdoms is no longer listed on the lego.com ...
12
votes
2answers
2k views

Is there a way to build a stronger LEGO ball than what was done by the Mythbusters?

In one episode, the Mythbusters busted a fake video by building a 7' tall LEGO ball. The construction did not roll very far before falling apart. Assuming that they only used standard bricks (with ...
12
votes
1answer
378 views

Where can I find “hacker” information about the NXT?

I want to know if, and where, is some extremely detailed hacker information on the Mindstorms NXT 2.0. Things such as the processor, flash memory, and RAM information, GPIO or I2C support, custom ...
12
votes
1answer
415 views

Which Lego board games come with minifigures instead of microfigures?

Of all the LEGO board games that have been produced so far, which ones come with minifigures instead of microfigures?
12
votes
1answer
487 views

Why did Lego use the same number for two different sets?

For example, Ricky Racoon on his Scooter from 1979 is a completely different set from House with Garage from 1996, but they share the same number (324). Why did Lego recycle numbers like this? Do they ...
12
votes
1answer
674 views

Steering mechanism for City-scale vehicle

I'd like to build city-scale (6 studs wide) motorized vehicles with PF remote control. There are already several suggestions on how to motorize wheels. The next challenge is steering mechanism that ...
12
votes
1answer
969 views

Will Lego repair a bad motor?

I have the Electric Technic Micromotor: http://www.peeron.com/inv/sets/5119-1 and it simply won't come on. I seem to recall at some point someone telling me a long time ago, that if you sent parts ...
12
votes
3answers
4k views

What's the best way to link two (or more) LEGO Power Functions (PF) train motors together?

Last Christmas I built an extended Emerald Night train to run around the tree. To get it to work I had to add a second Power Functions motor. I tuned both IR receivers to the same frequency and slowly ...
12
votes
1answer
2k views

Is there a freely downloadable set and part dataset?

I'm working on a project that will require a list of all sets including all of the parts they contain. I'm aware of at least three sites which have this information (Peeron, BrickLink, and ...
12
votes
1answer
379 views

Why do the tubes in the Seattle Space Needle Architecture set need to be cut?

I just received the Seattle Space Needle from the Architecture series. There are tubes that the builder is required to cut to a certain length for the model. This is the first time I've encountered ...
12
votes
3answers
6k views

Removing glue from Lego bricks

When I was five my Dad used some kind of a good glue to put together a set together so I didn't loose any pieces. Putting the ethics of that action aside, I want to split the bricks from another and ...
12
votes
3answers
10k views

NXT screen either flickering or blank, what do I do?

The screen on my LEGO MINDSTORMS NXT brick has just stopped working. It is either flickering, or blank. I have tried turning it on and off, installed fresh batteries, and I can even hear the selection ...
12
votes
3answers
3k views

How can odors be removed from bricks?

I recently purchased some used bricks. They currently smell like cigarette smoke. What is the best way to clean these parts to remove the odor?
12
votes
3answers
1k views

Third-party blocks with a smiling face or an umbrella with 2 dots on each side

I bought a bunch of duplos from the thrift store and inside there was not Just duplos but also mega bloks. I was able to separate most of them but there are a few that I just cannot tell which is ...
11
votes
8answers
2k views

Are there any mirrored LEGO bricks?

I recently built LEGO Creator 5770: Lighthouse Island which features a clever trick to build the lighthouse's lantern, using stickers on on a Slope Brick 2x2 and Slope Top 1x2x2/3: Step 54 from ...
11
votes
6answers
3k views

LEGO Safety: Known risks and how to avoid them?

I run an after school program that teaches engineering to kids, mainly Kindergarten through 3rd grade (roughly ages 5 - 9). I'm trying to educate my coaches as to the known safety risks regarding ...
11
votes
5answers
822 views

Does anyone have any successful techniques in searching for lego bricks in a pile?

We typically tip our box of Lego bricks onto a giant sheet (so that it can be easily picked up) but searching for bricks becomes really tricky and time consuming. You often remind yourself, "you'll ...
11
votes
2answers
891 views

What is the first day of the 2011 Star Wars advent calendar supposed to be?

I opened the Star Wars Advent Calendar 2011 early and I don't get what the set on the first day is. I'm not much of a Star Wars fan I guess. I can't identify it as any particular ship and my only ...
11
votes
4answers
915 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. ...
11
votes
4answers
3k 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 ...
11
votes
3answers
4k views

How to start with technic?

I have bought myself the technic set 9393 Tractor. I really like the model and I want to dig deeper into the Lego technic universe. I am not focused in building pre-designed models (although I enjoy ...
11
votes
3answers
900 views

What tool can get the Technic pin out from a connection closed in the other end?

I'm having trouble removing these LEGO Technic pins apart from their connectors and I don't want to use carpenter tools like pliers which may damage the bricks. What tool can get the pieces ...
11
votes
3answers
967 views

Are there any Star Wars vehicles that have not yet been produced in a Lego kit?

This includes all six films and the Clone Wars spin-offs. Every vehicle I can think seems to have been produced as part of a kit at some point. Are there any that haven't?
11
votes
2answers
8k views

Are there any African American LEGO minifigures besides the ones from the “Sports” basketball series?

I was wondering if there were any African American LEGO minifigures besides the ones from the sports basketball series... I got a brown head from a LEGO Stormtrooper set instead of a black one. I then ...
11
votes
3answers
4k views

How can I build a LEGO marble pump?

All right, here's a tough one for ya'll. How can I built a marble pump out of LEGO bricks? What would the mechanism which pushes the marbles up need to look like? Here's an example in this video: ...
11
votes
6answers
551 views

What is the best way of getting muck out of bricks?

I purchased a large bulk load of bricks for my 7 year old. Most have washed up quite well, but some of the bricks have various substances stuck in their underside. The types of foreign substances ...
11
votes
3answers
329 views

How can I keep LEGO winches from becoming tangled?

I have some LEGO winches/strings with hooks. Putting these away inevitably results in tangled strings (the next time I take them out). Even winding them up doesn't help. Storing these in drawers ...
11
votes
2answers
1k views

Where can I get 'classic' Lego heads from?

The new heads with expressions are all well and good, but I for one prefer the expressionless 'classic' faces. Are they available anywhere?
11
votes
4answers
4k views

Can I control 2 NXT bricks from a computer using bluetooth at the same time?

I am thinking about starting a project involving controlling the movement of a mindstorms robot depending on some input from a Kinect device; however the robot will require at least 6 motors. I have ...
11
votes
1answer
5k views

How can I create a simple steering mechanism for a car?

Just curious about this. How can I create a simple steering mechanism for a car? Either motorized or non-motorized solutions are fine; just not overly complex.
11
votes
3answers
239 views

Any way to make this setup “tighter”?

I'm trying to build a robotic arm, and I had the following built so that there was the minimum possible movement created by the gear wheel (that connects to the worm). However, there is still play, ...
11
votes
3answers
440 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 ...
11
votes
3answers
6k views

How accurate is the ultrasound sensor when moving?

Can I use an ultrasound sensor while the Robot is moving, or will it give bad data?
11
votes
1answer
620 views

How can I create a visually appealing Castle wall from one colour?

I have a bag of hundreds of classic light grey 2x4 bricks, and 2x1 bricks. How can I use these to make some interesting castle walls?
11
votes
1answer
600 views

What does SNIR stand for?

I know that SNOT means "Studs Not On Top", but I've also seen "SNIR" used, often in the same context as SNOT, but clearly different - what does it mean?
11
votes
1answer
2k views

What is the best-practice for circular lego staircase construction?

Aside from using the grey key-hole shapes, I'm looking for a Lego-standard or best-practice method for building a circular Lego staircase? Requirements: 6-8 studs "wide" (from the center to outer ...
11
votes
1answer
271 views

What different series are or have there been designed primarly for girls?

My daughter loves to play with LEGO sets but she is really wants to play with pink or 'girl' LEGO. I have ordered a few of the new LEGO Friends sets but I was wondering what other LEGO themes' have ...
11
votes
2answers
623 views

How should I model a Heroica scale castle bedroom?

My son has requested that we add a bedroom to our Heroica castle. I'm looking for some advice on the creation of the bed area. The Microfig characters are 1x1x2, and the rooms are generally designed ...
11
votes
2answers
981 views

What can I do to repair my minifigures loose neck/head joint?

I have a number of loose neck joints on my minifigures. How can I repair them? Any suggestions?
11
votes
3answers
5k views

Is it possible to build Lego bricks with a makerbot replicator 3D print?

Is it possible for plates, tiles or small pieces ? Is it possible to use MLCAD with a Makerbot replicator?
11
votes
1answer
4k views

Is there a site with the (previous) monthly LEGO Store mini-build instructions?

We have been going to the LEGO Store off & on for the monthly mini-build, but haven't been able to make it there for quite a few. I've been searching the web for the instructions for the builds we ...
11
votes
2answers
928 views

How did the LEGO Duck become a classic icon?

The LEGO handmade wooden Duck was released in 1935, long before the LEGO Brick was created. Many other wooden toys were made which can be seen in The Lego Museum, the duck however features in books, ...
11
votes
2answers
704 views

Is it possible to add the power functions to Western Train Chase?

I recently got the Red Cargo Train and it's a great Lego set but a Cars themed train going around my Christmas tree would be even better. Has anyone gotten the power functions to work on the Western ...
11
votes
4answers
6k views

Is there a standard scale for building “minifig scale” creations?

I've seen many impressive models built to "minifig scale" (e.g. the enormous USS Harry S. Truman aircraft carrier), but is there a standard (or at least widely adopted) scale e.g. 1:60 that these ...
11
votes
1answer
430 views

Why are minifigure wrenches tapered at the end?

The common minifigure wrench is tapered at one end. Why? None of the other minifigure tools are shaped this way. Is the wrench meant to also serve as a minifigure pry bar? Or perhaps as some sort ...
11
votes
1answer
1k views

What are all the different ways that LEGO pieces join together?

Has anyone made a list of all of the different types of connections between LEGO bricks? Obviously there's the stud connection - but there's also the ball and socket joint, the more recent ...
11
votes
1answer
1k views

Making a hexagon with plates

Do any of the wedge/wing shaped plates have the right angle to make a true hexagon or equilateral triangle? If not, is there any way to make a regular hexagon using plates? (I know they can be ...

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