6
votes
2answers
660 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 ...
3
votes
1answer
46 views

How to minimize the impact of erroneous sensor readings?

A group including myself are using the Lego Mindstorm kit to design a robot that is going to compete in a school competition. However, the sensors aren't as reliable as we would like them to be, ...
4
votes
1answer
616 views

Can I buy an add on educational kit for my retail EV3?

We ordered the retail version of Lego EV3, and my son loves it and wants to do more. Are there any add on kits we can buy to expand upon what we have, ie add on motors or special tech pieces, or an ...
0
votes
1answer
440 views

Should I buy the retail or education version of Mindstroms EV3?

There are other questions that list the differences in the retail and educational version but I cannot judge which one I should buy (educational or retail). I am buying Mindstorms for the first time, ...
1
vote
1answer
227 views

Price of EV3 education software

After looking around on the Lego Education website, I failed to find the price of the education software. I currently have the retail version of the software, but I want the extra features and blocks ...
5
votes
2answers
717 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
202 views

Personal part collection on the web (Bricklink or alternative)

I started using Brinklink a few months ago and although I really like it the interface is terrible. I am looking for a specific feature but don't know if it's unsupported or just I cannot find it. ...
2
votes
1answer
65 views

Retrobrite cleaning on old cellulose acetate bricks?

Is Retrobrite (cleaning with hydrogen peroxide, oxyclean, sunlight) effective or ineffective or, worse, downright destructive on old cellulose acetate bricks? My understanding is that method of ...
1
vote
0answers
64 views

RGB sensor HOWTO use?

I've got an RGB sensor (this one with the three LED thingies) and wonder how to access it using NXC. I know I can SetSensorColorFull(IN_1); and then access it using ReadSensorColorEx or, for ...
3
votes
2answers
240 views

Is it possible to change the OS in the EV3 Mindstorm Brick

I'd like to know how to change the OS embedded into the EV3 mindstorm Brick ( list of it ). For example, would it be possible to replace the existing one by a linux release without losing any ...
6
votes
2answers
159 views

How to remember initial position of a robot and return to it

I have an EV3 robot with motors, like a car, that can move forward/backward and left/right and have some sensors attached. I want it to remember its initial position by remembering all the movements ...
0
votes
0answers
57 views

Can Mindstorms EV3 communicate using protocol 802.15.4?

My aim is to make the robot communicate using protocol 802.15.4 through a USB dongle 802.15.4 over 6LoWPAN. The robot has to be able to get information from TelosB. I wonder whether this possibility ...
9
votes
4answers
704 views

Is “public transport” train compatable with Lego City track?

Among other things, set 8404 contains a train but it doesn't come with any track pieces (see set 7499). Is this train compatible with these Lego City tracks? I see where it's more of an electric ...
5
votes
1answer
214 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 ...
13
votes
2answers
625 views

Why are they called “minifigs”?

Were larger-scale LEGO figures the standard at some point in the past? It just seems odd to me that they're called "mini" when they're basically the only kind of LEGO figures available (not counting ...
6
votes
1answer
379 views

Lego plate with square holes?

I have some white plates with square holes on the underside. I'd almost think they were some imitation brand if they didn't have lego stamped on the studs. Can anyone tell me the history of when ...
1
vote
1answer
63 views

What is the input to the Speed Regulator?

I wanted to buy a transformer for the speed regulator, so based on this image, I bought a transformer with 12V DC output. It works. However, discussing this with a fellow AFOL, he pointed out that ...
7
votes
1answer
220 views

Which pre-2000 set had a mobile crane with lights?

I had a set similar to this when I was younger (I am fairly sure this was before the year 2000), although: The model was red, rather than yellow. The model was more of a breakdown truck, rather than ...
3
votes
1answer
853 views

Can 10153 9V train motor be powered by the Power Functions Battery pack?

I am currently making the switch to Power Functions with my Lego Train collection and am wondering if I can power the old 9v motors that I used with the metal rails, with a battery box from the power ...
11
votes
2answers
377 views

What kind of metal/alloy were on the old LEGO 9V train tracks?

LEGO's train tracks (the actual rail part) were made from some kind of metal alloy that does not seem to oxidize, and seems to have good electrical charateristics (low resistance). Any ideas what ...
3
votes
1answer
219 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?
3
votes
1answer
525 views

How hard is it to convert the new(ish) RC/PF trains to 9V?

I have a HUGE investment in 9V trains (think many thousands of USD) and was wondering how difficult it is to convert the newer RC/PF train systems over to 9V motors? Do the 9V motors fit? Does the ...
11
votes
4answers
3k views

What is the rarest LEGO production element (colour/shape combination)?

What is the rarest LEGO element according to the following criteria: Genuine LEGO elements, not those available through third party vendors or otherwise modified elements. (So nothing from ...
2
votes
1answer
198 views

Use iPhone camera as an input sensor for EV3

As EV3 has Bluetooth builtin as well as iPhone too, is there a way to connect them somehow so that iPhone could send data from the camera via Bluetooth to an EV3 brick? As a more general question, ...
2
votes
1answer
400 views

Unhappy minifig faces [duplicate]

I dislike how many current sets and mystery figures come with negative expressions such as sad, angry, and mad. Sure they have their place and purposes, but I'd prefer my son not have so many grumpy ...
6
votes
2answers
87 views

Is there a way to buy printed pieces to replace stickers?

I don't like stickers on my lego models. Does lego sell pieces with custom printed designs, so I can have newer lego models with all printed pieces like the old days? If not, how do I print designs ...
9
votes
0answers
118 views

How to Decipher Lego Building Instructions Filenames?

On the official site for downloading lego instructions, the filenames are often quite cryptic, and many sets have as many as six different files you can download and sometimes it's hard to tell which ...
8
votes
1answer
584 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 ...
1
vote
1answer
146 views

How to differentiate Cellulose acetate vs ABS lego bricks?

If one had a large tub of old legos, with some pieces going back to the 1950s, but all mixed together, are there any distinguishing features or appearance to the 1950s cellulose acetate bricks ...
4
votes
2answers
87 views

Opaque bricks with no center post?

What is the purpose of 1x2 red bricks without a post inside the brick? I know they often leave out the middle post on transparent bricks to make them look more window-like, but what about in opaque ...
14
votes
3answers
22k views

In what ways are LEGO and Megabloks incompatible?

I know that the basic bricks of LEGO and Megabloks fit together, but was wondering if other elements do too. Such as: Plates Rods (Ones Minifigures can hold, not Technic) Right angle (such as ...
6
votes
2answers
147 views

Massive collection given to our charity

I work as a volunteer for Cancer Research U.K. We have been donated massive amounts of vintage Lego. Could you please advise how to sell.
11
votes
2answers
4k views

How do I know when current sets will retire?

As the title asks, how is the easiest way to find when current sets on the Lego website will be retired and no longer sold. For example, the 10197 Fire Brigade has been around since 2009, same as ...
8
votes
2answers
906 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 ...
2
votes
3answers
711 views

Who else produces Duplo-sized blocks?

I gather that Mega Bloks Mini Bloks are the same size as Duplo, and are compatible with it. Do any of the other major brick manufacturers make similar bricks? Knowing the possibilities can help when ...
9
votes
5answers
603 views

Where can I find examples of everyday objects built in Lego?

Suppose for example I am interested in creative ways people have made trees, or minifig scale furniture, or just architectural details like windows. Is there some encyclopedia that organizes pictures ...
12
votes
2answers
839 views

Which official LEGO sets are micro-scale versions of existing sets?

The 10230 Mini Modulars set is based on the existing modular series: As well as the 4695 Mini Harry Potter Knight Bus. Have there been other micro-scale sets released by LEGO based on existing ...
1
vote
1answer
148 views

Cell phone holder [closed]

Is there build instructions for an interesting cell phone holder that can be placed on a table? The holder needs to hold the phone upright and allow it to be charged at the same time.
11
votes
3answers
4k views

Looking for a site with custom instructions

I'm looking for a website that has some cool custom model instructions. I have a LEGO store near me and I'm able to buy pieces individually. I'm looking for more of a sci-fi ship kind of instructions. ...
3
votes
2answers
289 views

Extra pieces in my set - Eiffel Tower

I recently purchased a Eiffel Tower Architecture kit and I found it having 9 extra pieces. I know it is normal to have extras but I think the amount is a bit high. Any ideas or explanations? Does ...
3
votes
6answers
4k views

lego ideas (with traditional bricks)

I would like to find a large catalog of Lego designs/ideas that can be built with "traditional" lego bricks (both normal and duplo). I have found many nice designs in the web, but most of them ...
5
votes
1answer
226 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 ...
6
votes
2answers
532 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
0answers
438 views

Connecting to NXT Brick via Processing over Bluetooth

I am attempting to control my NXT model via the Processing programming language rather than the provided language based on LabView. When I can establish a connection over Bluetooth, this works rather ...
7
votes
1answer
293 views

Can I repair a broken LEGO brick with glue?

I have a dump truck hinge piece that snapped in half when it got bent backwards too hard. Is there a type of glue that would be appropriate to repair the piece? Would superglue be a good choice? ...
11
votes
2answers
6k 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 ...
1
vote
1answer
80 views

How can I controll the speed of motor using gears?

Can anyone tell me how to use gear wheels to modify the speed of the motor in the Power Functions set 8293? I know I could use the remote control unit, but I need to have a fixed slow speed on a ...
3
votes
1answer
134 views

Which bricks warrant an extra to be included in a set?

I know why there are extra pieces in the sets, but I'm curious to find out which pieces will typically have an extra. I know that usually 1x1 plates (both square and round) will have an extra ...
14
votes
5answers
854 views

Are there any health concerns with letting children use old LEGO kits?

I have a hoard of LEGO kits that passed from me to my nephew, and now to my son. Some of the kits that are included with the set date back to the early 1970's. Are there any health risks with passing ...
3
votes
1answer
120 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. ...

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