5
votes
2answers
3k views

Is there any way to buy specific duplo blocks from Lego (pick-a-brick style and/or in bulk)?

I'm brand new to this site, so please bear with me... I've used the search function with no luck, trying to find similar questions that have already been asked, and I've skimmed all the ...
5
votes
1answer
280 views

Will using a bright LED to light my MOC harm my LEGO?

I'm building a LEGO model and planning on lighting it with a bank of 5 battery operated LEDs. I know sunlight negatively affects several LEGO colors. Will a bright LED harm the elements in my MOC the ...
5
votes
1answer
207 views

Why 2M Cross Axle has Groove?

I was sorting axles noticed only 2M has grooves. Why 2M Cross Axle has grooves? Is it for alignment?
5
votes
1answer
553 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 ...
5
votes
1answer
181 views

Gunner bot programing

I just build the RCX Gunner Bot using the instructions from this web site. I had to build something different to the one we built in the class, I added a touch sensor and light sensor, so the bot ...
5
votes
1answer
278 views

Is there only one lego Rohan soldier? Why?

As far as I can tell, Lego has released only one set containing a regular rank-and-file Rohan soldier, that is Uruk-hai army. Is this correct? Why is it so?
5
votes
1answer
515 views

Program a full rotation of a NXT motor in X seconds

I'm interested in mimicking the functionality of the Arqball Spin, at $60 it isn't cheap so I'd like to make the most out of my Mindstorms parts. I'd like to use NXT-G to program a motor to rotate ...
5
votes
2answers
524 views

Is the Lego 8884 IR Receiver compatible with earlier IR Speed Remotes e.g. from set 7897?

I'm thinking of buying the new Train power function, e.g. 8884 IR Receiver, 88000 Battery Box, and 8879 IR Speed Remote. However I already have the set 7897, is the Speed Remote from this set ...
5
votes
1answer
372 views

LEGO Scalextric?

I have a couple of these car parts in my collection but cannot find anything about them. They are copyright 2003 and show a number 3213 on the back axel. Interesting is that they have 3 electrical ...
5
votes
1answer
183 views

Measurements (LDU) of Lego tracks Set 151

I have an old set of 7851 curved tracks. I want to use the outer tracks (the ones with the bumpy surface). If I was to put one end down on a baseboard so that is tangent/parallel with the grid of ...
5
votes
1answer
253 views

My Own Train vs. other 9v trains

Does My Own Train series have any pros and cons (or pitfalls) against other 9v trains? Seems that is a rich series but less popular comparing to, for example, Santa Fe or regular City sets. Why?
5
votes
1answer
982 views

What different bricks exist with studs on the sides? [closed]

(Partially inspired by this question.) I have been wondering recently just how many different LEGO bricks there are with studs on the side. Which LEGO bricks have studs specifically on the sides? ...
5
votes
2answers
140 views

Two-state clicker button

For no particular good reason, I think it would be interesting to build a Lego button that behaves somewhat like the button on a click pen: as you press it, it alternates between a "down" state and an ...
5
votes
1answer
182 views

lego pieces stuck together! a stick 6m w/flange and a nose cone small 1x1 triangle

My lego pieces, a stick 6m w/flange and a nose cone small 1x1 triangle, are stuck together. I've been trying to seperate them but they just won't. Any advice?
5
votes
2answers
1k 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
473 views

Where I can find the pieces needed in a set?

I own this set, LEGO® Kingdoms King's Castle 7946. One day I let my wife's best friend's kids play with it. (Not the best idea in the world but they had a blast!) Needless to say, the castle ...
5
votes
2answers
344 views

Does anyone make a self-driving car?

Mapping and localization are the hottest trends in robotics today. And what's more exciting is they can be both implemented with a low-cost robotics kit like LEGO Mindstorms! I tried to make a ...
5
votes
1answer
426 views

Is it safe to try different firmwares on EV3?

I have prepared a SD card to run Lejos on EV3, as said on Lejos Sourceforge page and I'm about to test it. What worries me - will I still be able to go back to original Firmware if something goes ...
5
votes
1answer
299 views

How to use NXT device as a keyboard key for computer

Is there any way for me to set up my Mindstorms robot so that when I push one of the touch sensors it sends a signal to the computer to press a key?
5
votes
2answers
4k views

Compatibility EV3 software with NXT brick - known limits?

Lego says I can I use the new software to program old NXT bricks: Q: Is EV3 backwards compatible with NXT hardware? A: Yes. You can program your NXT intelligent brick using the new EV3 ...
5
votes
1answer
575 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 ...
5
votes
1answer
705 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
851 views

What is the difference between the two train motors 8866-1 and 88002-1?

At the Lego store the other day they were talking about a "more powerful" train motor for the Maersk train (I was asking about adding a second motor to the red cargo train so it would go uphill). But ...
5
votes
1answer
1k views

How to sell massive, vintage and unsorted lego collection with manuals?

So I was a big LEGO collector as a child in the early 1990s. The genres I have are town/city, pirates, and castle. To store them, I broke them all down to fit into 2 giant plastic tubs. I still have ...
5
votes
1answer
2k 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 ...
5
votes
2answers
2k views

Where do I find Mindstorms building plans?

I have the Mindstorms NXT 1 kit. It includes a printout of the first robot model building plans. The plans for several other robots (e.g. the scorpion bot) are included in the NXT software. However ...
5
votes
1answer
310 views

Can custom content be imported into LEGO Creator?

I was reading this Wikipedia article that states: Some people have uploaded custom (Lego) model creations for others to download into their version of Lego Creator. Tools used include LDraw, ...
5
votes
1answer
187 views

Is my Lego Star Wars “Jabba's Sail Barge” set a one of a kind?

Back in 2006 or 2007 I bought a Lego Star Wars "Jabba's Sail Barge" set. When I opened it and took out the instructions, it had an additional piece of paper. It showed that the piece 4299023 had been ...
5
votes
4answers
237 views

Removable glue for LEGO models

I want to glue my 4-year-old's LEGO bricks, but I want to be able to remove the glue when he is older. What is the best glue to use that is removable and okay to use on LEGO bricks?
5
votes
1answer
68 views

Is it safe to remove PC (polycarbonate) arms from minfigures?

I would like to replace the clear PC arms on the Chima ice figures with opaque ABS. Would I still be able to use the clear PC arms with other figures after I have removed them? I know that removing ...
5
votes
1answer
420 views

Does LEGO generally restrict the sale of Lego sets in a country?

I live in Israel where Lego are available but for insane prices. Generally 5X the price of a Lego set online. I have called Lego asking to have a Lego set shipped to me, and they have told me that ...
5
votes
1answer
330 views

Why did LEGO create different canister for the Visorak?

I have the six original Visorak (Sets 8742, 8743, 8744, 8745, 8746 and 8747) with different canisters (or boxes). For example, my Suukorak (8747) has a white canister, and my friend's has a black ...
5
votes
1answer
668 views

New ways of connecting levels of multi-story modular buildings

Compare these two instructions from the Green Grocers and Pet Shop modular building and you may notice (other than the background colour) that the top of the walls of the buildings are both arranged ...
5
votes
1answer
773 views

Any good Lego body decal templates or printing services

I was wondering could anybody point me in the direction of a good online service that prints minifig decals? I have no problem creating the designs etc but getting somewhere to print them is very ...
5
votes
2answers
4k views

Lego Mindstorm NXT cannot connect via bluetooth

I have an NXT mindstorm brick, running RobotC firmware. I am trying to connect to it, via bluetooth. At first, the problem was that I had the motorola drivers instead of ones from microsoft. Even ...
5
votes
1answer
138 views

Convert 3rd party NXT programming language code to NXT-G program?

Is there a way to convert code from one or more 3rd party programming languages used for programming the NXT into a program that can be loaded up in NXT-G? If not, do any text-based languages provide ...
5
votes
1answer
83 views

What's the best way to machine LEGO pieces on a mill?

Does anyone have experience with modifying LEGO pieces on a mill? Any suggestions on cutting speed?
5
votes
1answer
517 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 ...
5
votes
1answer
507 views

Are these ATC bricks from the 1970's LEGO?

I have some Lego compatible basic bricks from early 1970s or late 1960s. Bought in Finland or maybe Germany or Sweden. Can anyone tell me more about them? As you can see, the interlocking mechanism ...
5
votes
2answers
2k views

How to program two NXT motors to run at the same time?

I'm working on a project with multiple axis of movement… trying to get two motors to run at the same time in order to achieve a mix of two!
5
votes
2answers
383 views

Communication between two Ev-3 bricks

How the communication between two Ev-3 bricks is done over Bluetooth? What is the nature of data that can be communicated?
5
votes
1answer
66 views

Accessing ARM Processor Memory Registers through NXC

Specific to the NXC (Not eXactly C) programming language. Is it possible to access the memory registers on the ARM AT91SAM7S256 processor? I'm trying to investigate the use of Timer Interrupts to ...
5
votes
1answer
372 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
569 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 ...
5
votes
1answer
136 views

Where can I find the black crusaders horse barding?

The question is all in the title. I'm talking about this: the second knight from the left entrance to the castle.
5
votes
1answer
587 views

RobotC for RCX cannot find USB IR Tower

I have looked for similar question but found null. So here I am asking. I have Win7, a RobotC fo RCX and Mindstorms for RCX (both are old version, but available free). I borrowed an old LEGO kit ...
5
votes
1answer
2k views

How to control a RCX from a Mindstorms NXT

I have both an RCX and an NXT. I would like to control the RCX brick from the NXT (and possibly communicate back to to the NXT from the RCX). I would like to avoid purchasing the Mindsensors RCX to ...
5
votes
2answers
152 views

What are all the different third-party accessories that I can get for an RCX?

What are all the different third-party accessories that I can get for an RCX?
5
votes
1answer
282 views

Building a 45 degree brace

I'm trying to reproduce my own house in Lego, and attached is a photo of the porch above my front door that is supported by a 45 degree wooden brace: At my current scale, the vertical white wood ...
5
votes
1answer
441 views

Has Lego discontinued presenting alternate configurations on the backs of modern boxes?

When I was younger, the backs of my Castle/Space Lego set boxes showed alternate model builds for the supplied pieces, configurations not detailed in the instruction manual. I appreciated these ...

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