12
votes
5answers
18k views

How much does a LEGO brick weigh?

I am trying to do a science project and I need the exact weight of one of the LEGO pieces. I am using it as a counter balance on my scale. What is the weight of a 1x4 LEGO brick?
2
votes
1answer
144 views

need help identifying which set these 3 bags are from

I ended up with three lego bags but need help identifying them. mostly light grey and dark grey with some blue and burgundy. The bags say 2011 lego on recycle symbol. There are two clear half ...
18
votes
2answers
5k views

How to minimise or remove sun-stains/fading from blocks?

In particular, I've had white blocks that have yellowed in places. Can the colour consistency be restored? Or at least improved? I'd be more interested in people's actual experiences rather than ...
2
votes
3answers
226 views

Do you use the plastic buckets for purposes other than organizing your bricks?

We have several bucket sets like #5560. Now that our collection is growing, it's becoming harder to find what we need in the buckets even though we have them sorted by color. Plus they are in a ...
4
votes
3answers
479 views

Does knolling help or is it just part of the fun?

When building a new set, many people knoll their LEGO bricks before beginning the assembly. My question is: Is there a actual advantage to knolling all the pieces or is it only a way to stretch the ...
7
votes
1answer
3k 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 ...
3
votes
1answer
194 views

How exactly does the pull-back motor (12787) work?

I've got the 42034 Quad for my birthday and it's been really fun to play with technic after so many years. I am very curious about one thing, though - how does the pull-back motor (12787) work and ...
4
votes
1answer
189 views

Which combination has a lower gear friction?

I need roughly a 1:3 reduction and I see a couple of ways to achieve it: using a 8t gear and a 24t gear (1:3) using 2x 12t gears and 2x 20t gears (1:2.779) using a 16t gear and a 40t gear (1:2.5) ...
5
votes
1answer
268 views

My building is developing gaps and spaces

I am building a large project, and there are spaces developing between bricks and plates. I've been working on it for almost a year, and some places are 20+ bricks high. What can cause this over time? ...
4
votes
1answer
543 views

Pre-Technic gears?

I have this set of LEGO gears. I remember seeing them first at my grandparents in the mid 80's. They predate my first Technic sets (~84 or 85). I have fond memories of my dad building a 3-speed ...
2
votes
1answer
51 views

Brick Compendium: BIONECULAR LEGO [closed]

I'm a great fan of the BIONICLE series. My oldest sets were the Bohrok from Wave 1 part 2, as I'm calling it. Seeing as how I haven't posted here yet, I'm going to ask for a comprehensive compendium ...
0
votes
1answer
96 views

Can i change the way the ir remote works?

I bought an EV3 and the first thing that I want to do with it is control models with the remote. I finally discovered how to do this after a long search. It can control the Formula EV3 racing car ...
5
votes
1answer
575 views

What is the “Module” of a LEGO gear?

Module, m this indicates the tooth size and is the number of mm of pitch circle diameter (p.c.d.) per tooth. For gears to mesh, their modules must be equal. Gear ISO standards and design ...
1
vote
1answer
93 views

Which set includes a large white mask

I bought a sealed bag at Goodwill but It did not include any information on what set it is from. Pieces look like large white body plates, skeletal/Stormtrooper mask and tusks.
3
votes
1answer
158 views

How can I build a LEGO structure based on a real building?

I have a grandson who wants to build a LEGO building that looks like the high rise building I live in.
19
votes
3answers
24k views

How do I print images onto minifig body parts?

I have seen a few custom minifigures out there with images on certain body parts never produced by LEGO. What is the best way to achieve this? I have heard of some people printing out the image on ...
5
votes
1answer
4k views

How do I update my NXT firmware using EV3 software

The new EV3 software tells me to update my firmware on the NXT. When I go to the tools menu and select update firmware it tells me the NXT brick can not support this function.
21
votes
5answers
4k views

What is the smallest LEGO component?

When I purchase bulk LEGO bricks, one of the first things I do is to tip the whole lot into a mesh bag and give them a good soak in the bath (of course, I remove all the electrical bits etc. first). ...
27
votes
4answers
43k views

What are the dimensions of a LEGO brick?

What are the real world dimensions of bricks? (starting with 1x1 brick) Plates? Studs? Does LEGO think of this in metric or imperial units or something else?
1
vote
0answers
63 views

Renting LEGO Service in UK [closed]

Has anyone used the LEGO rental service, www.letsgoplay.co.uk? I'm not quite an AFOL, but I do enjoy building the larger sets, and although it would be great to keep some of them long term I just ...
2
votes
1answer
159 views

What are those 6 extra studs for in 42000 Grand Prix racer?

I recently purchased a set, Technic 42000 Grand Prix Racer, that I am very happy with. However, I am perplexed by the fact that the set came with 6 extra transparent 1x1 round plates (studs). As you ...
1
vote
1answer
249 views

Where can I get a large number of LEGO bricks cheap? [duplicate]

Yes, I see other people's amazing MOC's all the time, and think, "man, I could totally do that if I had enough bricks." The problem is, I don't really know where to look for a whole bunch of LEGO ...
3
votes
2answers
424 views

How important is a center differential on a 4WD model?

I am looking to make a 4WD, single-engine powered vehicle, and I have seen others such as this which use three differentials to distribute the power to all 4 wheels: ...
5
votes
3answers
305 views

How do I move assembled LEGO sets?

How do I move large sets put together? We do not have the instructions or original box. We are moving from one home to another.
3
votes
2answers
308 views

What is this cylinder like part?

I found a pair of these among some parts I bought. It looks like some sort of cylinder, which could hold an axle for a piston. Is that correct, and how would I use it then?
6
votes
1answer
447 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 ...
3
votes
1answer
115 views

Best system for lifting things without pistons

So I am Building a Big walker thing with a mining laser on bottom that can be lifted on one half and the other attached to the vehicle but I cant seem to find a way because the hooks attached to the ...
4
votes
1answer
171 views

Is LEGO Junior compatible with regular LEGO?

Does LEGO Junior fit with regular LEGO? Say for 8-12 year olds? I want to make sure it is not obsolete and can be used as the child grows alongside the LEGO collection.
3
votes
3answers
1k views

Could I do datalogging in Mindstorms EV3 Home edition?

Apparently datalogging is an integrated part of the educational EV3 software. But I got the Home edition. Is there some module or thing I can use to get datalogging functionality in my Home edition? ...
5
votes
2answers
245 views

Is it possible to use DUPLO bricks in LDD?

Is there a way to import DUPLO bricks to Lego Digital Designer? Or is there another way to make DUPLO build instructions?
1
vote
0answers
152 views

How do I control one EV3 using another through bluetooth and LabVIEW?

I have LabVIEW 2014 and I'd like to control make one EV3 move forward using another through bluetooth using LabVIEW, and I don't want to have to use the computer as a relay. How do I do this?
3
votes
1answer
113 views

Can the rcx work without the infrared tower

I'm getting a rcx 1.0 or 1.5 and it's not coming with the tower. Can I still program it, using some sort of cable?
1
vote
2answers
99 views

Which program do I use to program my rcx 1.0 or 1.5

I am getting an RCX and I know it is ether a 1.0 or a 1.5. Which program do I use to program my RCX?
4
votes
3answers
223 views

How to make lego unbreakable

I would like to build a lego model which is unbreakable. What is the best approach? I am not looking for just glue here. EDIT: I don't just want to strengthen the bond between the bricks, but the ...
25
votes
6answers
4k views

How do I change the color of a brick?

I have a uniquely-shaped brick that I would like to make a darker shade of gray (it's currently blue). What media is the best in terms of durability for continued use (i.e. re-use, ...
10
votes
1answer
2k views

How much does a life sized LEGO person sculpture weigh?

Generally, how many pounds of LEGO would it take to make a life sized person sculpture? Do they weigh anywhere near the same as the real person they are modeled after?
2
votes
2answers
359 views

How to design ackermann steering with lego wheel bearing front?

I wanted to use a steering system based on the 11949 part: But I am not sure how to use it in an ackermann system - I would like to be able to have drive and suspension on the wheel, and this piece ...
3
votes
0answers
31 views

Using Dexter WiFi Sensor with Robot C

My wife bought me a Mindstorms NXT system a few years ago and I bought a Dexter WiFi sensor (http://www.dexterindustries.com/manual/wifi/) for it, By the time I got a chance to work with it, I found ...
6
votes
1answer
1k views

How can I rotate an EV3 motor an exact number of degrees using RobotC?

I'm trying to rotate the motor of an EV3 by an angle of 50°. I can't. How I can rotate a NXT/EV3 motor by a given angle using RobotC?
2
votes
1answer
229 views

LEGO Mindstorms NXT - NXC compiler for OS X

I need an IDE for LEGO Mindstorms on my Mac, but I only found a few for Linux and Windows but not for Mac. I found NeXT Tools, but the newest version isn't compatible with Yosemite. If I execute it, ...
10
votes
3answers
1k views

How do you construct odd-angles on buildings

I was thinking of building a model of the famous Castillo de San Marco located in Saint Augustine, Florida. A small bit of research shows that Legoland has a replica (flickr link) and that there are ...
5
votes
2answers
88 views

What can I use to glue LEGO bricks to Metal?

So I have no roof lining in my car and instead of replacing it with another carpet I thought covering it in Lego would look pretty cool What would be the best way to glue the LEGO to the metal of my ...
35
votes
3answers
27k views

Are DUPLO blocks compatible with LEGO blocks in any way?

Can I build a model out of both DUPLO blocks and LEGO blocks? Do they fit together?
5
votes
2answers
132 views

How can the new LEGO pneumatics be used for trains?

LEGO came out with new pneumatics. Since I'm a train guy (my wife is more into technic and already saving money for the Mercedes ;)) I was wondering, how could we apply the new things for Trains?!
1
vote
1answer
542 views

Is it possible to change the language in the EV3 Education software?

I have only 1 language in menu "Edit - Change language": Is it possible to add another language packs to EV3?
7
votes
0answers
163 views

What electrical contact material is used for PF Connectors?

I'm designing my own PF electrical connector and I want to have the same functional characteristics as the original Lego brick. Could you please let me know which electrical contact material is ...
2
votes
1answer
117 views

Groove dimension of 4216 or 88393?

What is the dimension of the groove of LEGO part #4216 or #88393?
1
vote
0answers
31 views

LEGO Mindstorms not downloading to brick properly

When I try to download a program to my Mindstorms brick, the download immediately completes, and the program is listed on the brick menus, but it will not run the program. Also when I open the memory ...
11
votes
3answers
902 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 ...
2
votes
1answer
105 views

Lego RCX hardware schematic

Where can I find the hardware schematic for the Lego RCX brick? I spend a lot of time but unfortunately didn't find any useful information.

15 30 50 per page