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7
votes
2answers
931 views

What are LEGO rubber bands made of?

I have noticed that LEGO rubber bands (along with just about everything else LEGO) are fantastically durable. They last ages without getting crusty and dying like most commonly available rubber bands....
6
votes
3answers
7k views

NXT Brick will not update firmware

I'm running 6 NXT robots in an introductory class. Occasionally we've had bricks that would not accept a program and I've reset the brick by pushing the reset button under the battery pack as well ...
4
votes
1answer
1k views

Use legacy RCX sensors with EV3

In NXT-G, there was a "Legacy" Block pack which had blocks to allow for the use of RCX motors/sensors with the NXT, as long as you had a converter cable. However, the EV3 software does not have this, ...
44
votes
1answer
9k views

What is SNOT building?

I have seen reference on LEGO forums to "SNOT building". This sounds gross! Are there really squishy-sticky LEGO bricks, or what?
31
votes
3answers
7k views

What is inside the “weight element” brick?

I own a few bricks that contain a weight inside of them. 52g according to Lego. What exactly is inside of these bricks that makes them heavy?
21
votes
2answers
2k views

What are the practical bounds of a minifigure?

I want to make some minifigure-scale vehicles and devices, but I am wondering what the smallest possible minifigure enclosure might be. I know minifigures are not perfectly square. Their arms and ...
17
votes
3answers
2k 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 separated ...
15
votes
3answers
685 views

How to find out if an element is out of production

Is there a way to know if Lego has officially stopped making a certain Lego element? As an example, from the 580 Lego set, I haven't seen this conveyor belt (along with those wheels and the "Legoland"...
15
votes
3answers
2k views

Can anyone find a photo of the “LEGO bricks, not LEGOS” insert?

Debates aside; I have been told that there used to exist a message either in Lego catalogs or inserts in boxes that reads as this: The word LEGO® is a brand name and is very special to all of us in ...
15
votes
7answers
4k 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 ...
14
votes
1answer
1k views

What are these Technic “Zapfen” (“stoppers”) called in English?

What are these pieces called in English? Google translator doesn't help in this case...
14
votes
5answers
1k views

Does Lego market sets that were designed by fans?

My {son, daughter} read on a LEGO box that the set was designed by a LEGO fan. That is amazing! Is this common and how does my {son, daughter} get into that? What sets were designed by fans so far?
14
votes
3answers
7k 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 ...
13
votes
1answer
4k views

What are the electrical properties of electric LEGO systems?

Several electric LEGO systems exist: LEGO Trains LEGO Technic Power Functions (PF) LEGO Mindstorms (in several versions) ...? How do these systems differ in electrical properties and which systems ...
12
votes
4answers
788 views

Where to find this green transparent brick?

Where can I find this lego brick? I have one but I want some more of them for a project.
11
votes
1answer
6k views

Is there a changelog for any firmware updates on an EV3 brick?

When a firmware update is released for the Mindstorms EV3 brick, are there usually any changelogs for them explaining what's been added or changed? If so, where can they be found?
10
votes
1answer
2k views

Why is my LDD model incomplete after I export it to LDraw?

I have an LDD model that I exported to an LDraw file. When I opened it in LDView, only part of it was displayed. It looks like some parts were not exported properly. Is it normal? Why does it happen?
10
votes
5answers
9k views

RCX firmware download problem

I hope someone can help me with a problem with getting an original RCX 1.0 system working with a current PC. I bought the RCX 1.0 system back in (I think) 2000 but its been in storage a long time. In ...
9
votes
3answers
10k views

What parts are really required to motorize 10219 Maersk Train?

The Official site detailed page states that: Motorize your Maersk train by adding LEGO Power Functions #8878 Rechargeable Battery Box, #8887 Transformer 10V DC, #8884 IR Receiver, #8879 IR Speed ...
6
votes
1answer
2k views

How to control a 88004 Servo Motor with a Raspberry Pi?

I am able to control a simple servo motor such as SG90 by using pulse-width modulation. However when it comes to controlling a 88004 LEGO Servo Motor it is simply a nightmare. By using PWM all I ...
6
votes
1answer
2k views

How can an EV3 motor “remember” it's starting position?

I am currently working on a project that uses large motors. I want the project to return to a "starting position" (0,0,0) at the touch of a button so that it can be used multiple (identical) times. ...
5
votes
1answer
257 views

Can I Conect 2 NXTs so that they work together?

I am building up a robot and I want to use 2 NXT connected together because I need more than 3 ports A,B,C. So my question here is: When I write the code, is there anything different I have to do? ...
5
votes
3answers
2k views

Is the LEGO Midstorms EV3 software compatible with OS X yosemite?

OS X Yosemite (10.10) was just released yesterday. I want to upgrade, but I am worried that the EV3 software will be incompatible. What should I do? A. Upgrade B. Stay on OS X Mavericks (10.9)
4
votes
1answer
2k views

How to program light sensor to follow moving light using NXT

Cannot figure out how to simply program Lego Mindstorm NXT robot to follow another moving robot that has a bright LED light attached to it. Currently my programme looks like this:
2
votes
3answers
5k views

LEGO Mindstorms NXT - bossa driver prevents firmware upgrade

First of all, this may sound like a duplicate post. But, my Mindstorms NXT 2.0 has been having the "Clicking Brick Syndrome". I have been told that uninstalling the bossa driver then unplugging and ...
1
vote
1answer
8k views

Instructions for LEGO bag 135149

Can someone please help me find the instructions for LEGO bag 135149? The bag says 2011 and has a propeller-type brick and a white helmet? Any clues what this is?
15
votes
3answers
13k 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 ...
14
votes
2answers
3k 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?
12
votes
1answer
793 views

Historically, what types of sets have proven to be a great investment?

My brother recently sold some of the lego he had as a child, and they went for a lot more than they cost originally, even taking inflation into account. So, what types of sets have risen in value ...
12
votes
1answer
3k 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 ...
10
votes
3answers
2k views

How can a Mindstorms robot lift something very heavy?

I have a small LEGO Mindstorms robot and I have to lift something heavy. Now it seems not possible because the motor is not strong enough.
10
votes
1answer
2k views

Why doesn't LEGO bring back old series as they were “in the day”

As many of you probably can tell, LEGO has been rehashing old series and giving them a new twist (eg. Rock Raiders -> Power Miners, or whatever its called). Why doesn't LEGO actually make some of ...
9
votes
3answers
1k views

Where can I find LEGO X-Pod Playoff rules and printoffs?

Where can I find X-Pod Playoff rules? LEGO doesn't seem to be hosting them anymore. Asked because of this question. Hopefully it can be mirrored on a few sites so that it doesn't disappear again.
9
votes
5answers
1k views

Minifigure Hand broken and stuck in arm

A friend of mine gave me some of his old minifigures. As you guys can see, the hand of one of the figures is broken and a part of the hand is stuck in the arm. Do you have any ideas how to remove the ...
9
votes
1answer
377 views

Old sets, new bricks

Are there sellers out there that compile old discontinued Lego sets with new bricks? In other words they source new bricks and instructions to put together old discontinued sets. Thanks
8
votes
1answer
4k views

Mindstorms 2.0 can't download to NXT brick with error 142023

Using Mindstorms education 2.0 on a Windows 7 computer I can't seem to get the program to see the NXT via USB or bluetooth dongle. When connected by USB nothing appears in the NXT window with device ...
6
votes
1answer
298 views

What kind of yellow is used for a typical minifigure?

I've done some research and found a basic LEGO basic colour pallet. I recognise the yellow used for yellow bricks (24, Bright Yellow, #fec400) but it doesn't seem to match the colour for minifigures ...
6
votes
1answer
2k views

On Lego Mindstorms EV3, is there a way to change the input parameters of a My Block? [duplicate]

I am writing a program for which I did a My Block. I later realize that I need to add a new input parameter and I can't find a way of doing this without creating a new My Block. This seems it should ...
6
votes
1answer
624 views

What is this upside down roof peak or boat hull?

Here's another mystery piece from my collection. I'm not 100% sure it's genuine LEGO, but I would love to know whether it is, and if so, what part. It attaches to the bottom of a 2x8 brick securely. ...
6
votes
1answer
1k views

What is the function of Duplo part# 38507 RAIL ACCESSORY, NO. 4

Can someone explain to me what 38507: RAIL ACCESSORY, NO. 4 (#6225519) is for? I've got this in the new Duplo Train accessory #10882 and can't figure out what it does :S
5
votes
1answer
2k views

Lego 3804, Mindstorms Robotics Invention System 2.0 on Windows 10

I gave my grandson (11 years old) the LEGO 3804 Mindstorms Robotics Invention System 2.0. He built a couple things and when he tried to install software to program what he built, the computer would ...
5
votes
1answer
2k 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
6answers
22k views

Where can I download the EV3 education edition software for free?

I have a site license but I'm not able to find the download for the software anywhere. Any help would be greatly appreciated.
4
votes
2answers
353 views

NXT Motors curving to the right

The NXT motors have been curving to the right by about 10-20 degrees. We have checked the program, no curves. We have checked the wiring, but it is also plugged in fine.
4
votes
2answers
3k views

Vision Command and Exploration Mars software for Mindstorms RIS 2.0

I recently bought a set 3804 LEGO Mindstorms RIS (Robotics Invention System) v2.0 very well maintained but did not have the installation CD of the RCX program and IR tower. With some research on the ...
4
votes
1answer
574 views

Using the unregulated motor block and conversion cable to light LEDs

I have the following setup: It consists out of An EV3 brick A nxt to 9v conversion cable (https://www.bricklink.com/v2/catalog/catalogitem.page?P=x1676) A 20 cm 9v to Power Functions conversion ...
3
votes
3answers
6k views

LEGO Mindstorms 9797 (NXT Education base set) Software Download

Where I can download the Software for the LEGO Mindstorms 9797 (NXT Education base set)
2
votes
2answers
173 views

How to make an exact 16 degree turn?

Does anyone know how to make an exact 16 degree turn with a LEGO robot?
2
votes
1answer
117 views

Utility pole and angles

I am using the following MOC from the Internet: http://www.moc-pages.com/moc.php/8435 This model is fine if the sets of power lines are all in a straight row. But what about at an angle? How does ...
2
votes
1answer
217 views

Where can I go to get good custom LEGO minifigures?

I want certain LEGO minifigures, but TLG doesn't make them. I would like to find someone or someplace to get some good custom minifigures. I can pay.

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