5
votes
4answers
115 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?
4
votes
1answer
61 views

What are the curve radii for the curved slope pieces?

Does anyone have a table with the curve radii for the curved slope pieces? If not, does anyone have a good idea for measuring a third point on the curve? Since I know the front and the back ...
3
votes
3answers
423 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)
8
votes
1answer
738 views

Can I pitch an idea to LEGO?

How would I contact LEGO about an idea for some kits to be built and sold? I have designs for simple kits that I have built for my son that I think would be very popular.
3
votes
2answers
150 views

What are the largest LEGO® Power train sets available commercially?

What set(s) are the largest by number of pieces? These sets could be retired or existing. I am also curious what set(s) have the most rails pieces included.
2
votes
1answer
81 views

How make robot turning going straight?

I have been struggling with this function for a while. I want my robot to turn left until it detects black then turn right until it hits black again. Then, I will divide the angle in half and call ...
3
votes
2answers
111 views

Strain Gauge on Lego Bridge

I had an idea to teach my son (almost 4) about bridges and large structures from an engineering point of view. I thought that it would be cool to build a large bridge and put a strain gauge on it. One ...
1
vote
2answers
312 views

Mindstorms crashes when connecting to EV3 with Bluetooth

I am using OS X 10.10 (Yosemite) on a 2011 MacBook Air, LEGO Mindstorms EV3 Home Edition v1.0 and the latest firmware on the EV3 (v1.06H) When I attempt to pair the EV3 with my Mac over Bluetooth, ...
1
vote
1answer
31 views

NXT shuts down USB on Mac after connecting motors

After successfully connecting our NXT to my Macbook Air and upgrading firmware to 1.31 we built our first robot. We plugged in the motors to ports A, B & C and now we get an Error stating that USB ...
0
votes
1answer
56 views

where can I find simple Lego ideas [closed]

I have just acquired a bunch of bricks and specialized bricks. Where could I get a lot of ideas? Anything to do with a city would be good. I have already tried the LEGO club.
4
votes
3answers
85 views

9v and Power Functions Hybrid?

I am building a train layout and I am running some of my track through a tunnel. I would like to know if I could hook up a 9v train motor at the opposite end of my train. The front will use Power ...
5
votes
2answers
242 views

Help identify mystery piece and set it could go to

More mystery parts from the bags of LEGO pieces we bought. I can't find a LEGO symbol on it. Is it a LEGO part or some other brand?
2
votes
1answer
225 views

Help identify this 70s or 80s lego space set

I bought some bags of LEGO bricks which appear to contain a 1970's space set in it. I want to find instructions to put it all back together.
1
vote
1answer
53 views

Is it possible to use a LEGO NXT ultrasonic sensor for a LEGO train crossing?

I was looking at LEGO NXT components, and I found the ultrasonic sensor. I was wondering that if I put off to the side of the track, the nose of my train would activate the sensor, thus operating the ...
2
votes
0answers
30 views

Train track switching using servo motor [duplicate]

My project requires using a servo motor for switching track. It needs to be automate switching points. Is this possible? What is the cheapest / easiest way of achieving this?
8
votes
3answers
159 views

Brick-built alternative to “Door 2 x 5 x 5 Swivel, Bracket Base”

I am trying to make a brick-built alternative to the swivelling door piece that's frequently used to provide secret entrances in castle sets. Example: this combination (images from Bricklink) The ...
-4
votes
1answer
99 views

Help find a piece? [closed]

I am looking for a specific piece. It comes with a new-ish set. I know it is orange and has a space for an axle. It has a point jutting out.
2
votes
2answers
61 views

Faulty NXT Motor

I have a motor that prevents the program from running. It simply allows a few slow movements forward with stops in between. It seems very stiff to rotate manually. Any way I can repair this motor?
2
votes
1answer
75 views

How can I use the EV3 educational firmware instead of the retail version?

I have an EV3 brick from the retail kit, which is currently running the retail firmware. I would like to replace the EV3's firmware with the educational version. How can I do this?
0
votes
1answer
59 views

Why I get this “message unable to compile some documents for deployment ev3”?

I have a LEGO Mindstorms EV3 program that I was working on for a long time but recently and suddenly when I try to download the program the software displays the following message: "unable to ...
1
vote
1answer
71 views

Teleoperated arm trouble

I have built a robotic arm with the lego Mindstorms ev3. My goal is to control its motion via teleoperation, that is , to have a gyro sensor strapped onto my arm and have the robot mimick the up and ...
2
votes
2answers
71 views

Resources to learn useful common Mindstorms mechanical construction patterns

I'm currently working on building a small scale CNC-like (X-Z, no Y axis) machine to cut glass mosaic tiles. I decided to give it a go using my EV3 set and I'm having some trouble with the Z-axis ...
5
votes
1answer
65 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 ...
2
votes
2answers
189 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 ...
3
votes
1answer
56 views

How can I tell if my NXT motor is faulty?

I pulled my old Mindstorms NXT out of storage (it's been there for a few years). After patching together a test robot, I noticed that my motors behave strangely. At first, one of the motors did not ...
3
votes
2answers
158 views

Substitutions for vintage hinges

I've recently gotten back into LEGO and I'm trying to restore old space sets (late 80's era) by buying parts on Bricklink. I've noticed that some of the hinge pieces are extremely expensive (e.g. ...
2
votes
1answer
164 views

How do I get the Mindstorm EV3 software to recognize an NXT brick via Bluetooth?

I'm trying to program my NXT brick via the EV3 software over a Bluetooth connection. I can connect it via USB (although that too failed initially but has since resolved; not sure why) but I'd really ...
3
votes
1answer
111 views

Why are some of the supports on bottom of a lego piece hollow, and other are solid?

I've added an image of me holding two 1x3 bricks, one has solid supports (not sure the technical name...) and the other has hollow supports. Does anyone know the reason why they are different? Other ...
1
vote
1answer
166 views

Need help to identify minifigure

Can someone help me to identify minifigure linked below: I´ve been searching now about three hours without luck :)
3
votes
2answers
89 views

Lego Motor for cycling a tool

I am curios to know if I can utilise the Lego Power range to rotate a transducer to a set point and return to its original position and if so is it able to cycle the movements repetitively? Ideally I ...
1
vote
1answer
127 views

What part can I use to get the connection

This is what I have.. Would like to connect the long "thing" to the square base.. not sure which part will give me a angled elevation In case you are wondering what I am trying to do.. this is what ...
1
vote
1answer
119 views

Is it possible to connect EV3 and NXT bricks like master/slave configuration via bluetooth?

Can I make a Bluetooth connection between LEGO EV3 bricks and LEGO NXT bricks? and If it is possible how to handle the software to make a chain between them?
2
votes
1answer
96 views

Is the LEGO Mindstorms EV3 brick waterproof?

I am trying to build a ROV (Remotely operated underwater vehicle) with Lego Mindstorms Ev3. Is it waterproof?
3
votes
1answer
140 views

Can anyone identify this spinner with 1..5 and a skull?

My son has just inherited a large box of Lego, we're hoping someone can help identify what set this might be from.
1
vote
1answer
134 views

Direct command lego ev3 [closed]

Is there any documentation about direct command bluetooth of EV3? Thanks, regards!
1
vote
0answers
87 views

What method do you use to figure out what set you have? [duplicate]

This question really got me thinking about this: I bought a second hand pack of pieces and it looks like it may be a specific set How do you even go about figuring that out? How would you even start? ...
-1
votes
1answer
87 views

LEGO mindstorm - which product to use to make projects mentioned below

I have to buy Lego Mindstorm kit for some projects. I really have never used Lego before, my friend asked me to consult him about projects (I use micro controllers and make robots from material I ...
0
votes
1answer
61 views

Decals for Lego Pharaoh's Quest Flying Mummy [duplicate]

Do all lego sets have decals? I am specifically looking for decals for Lego Pharaoh's Quest Flying Mummy.
3
votes
1answer
139 views

How can I use 1 motor for grabbing/lifting and another for moving?

I am really stuck on how to use the three motors for better functions. Is there anyway in which I can use 1 motor for efficient/quick movement while turning left and right? Another thing is whether I ...
3
votes
1answer
214 views

I bought a second hand pack of pieces and it looks like it may be a specific set

Hoping for help to identify a set of lego pieces. It definitely has a car wheel base, and the base boards are green.close
4
votes
1answer
116 views

How much does the NXT brick weigh?

I am working on a project that involves LEGO Mindstorms bricks but for some tasks I want to know the weight of the NXT brick, so I would be pleased if anyone can help me.
2
votes
1answer
44 views

How to make NXT bricks communicate information?

Is it possible to connect, in some way, two NXT bricks that has program functions running on both. For example, Brick one would tell brick two that it is okay to start a program. Are there any sensors ...
3
votes
2answers
59 views

Is there a time mechanism that can be added to an NXT program?

I wanted to create a system where an NXT block would be set into function at a certain time of day (maybe 5:00 and then 5:10 and so on). I would want the timing function to be embedded into the NXT ...
2
votes
1answer
189 views

What set does this minifigure head come from?

I came across this picture: I think the body is from The LEGO Movie Pajamas Emmet polybag, but have no idea where the head is from.
4
votes
1answer
213 views

How to build an automatic Lego train system?

I was wondering if anybody has ever tried using the IRLink NXT sensor to make an automated train system and if so, what kind of setup did you have to make it all work? I have been working on a train ...
0
votes
1answer
136 views

EV3 bluetooth controller for mac

Is there a suitable EV3 controller for mac? It should be a compatible alternative from the official EV3 controller in the iOS app store or google play.
1
vote
1answer
83 views

Where can I buy engraved LEGO bricks?

What is the cheapest site to buy engraved LEGO bricks? I am searching for the cheapest site to buy engraved 2X4/2x6 bricks so that I can put names on them and send them to people. Any insight is ...
3
votes
1answer
85 views

Does anyone have a picture of the Lego Club alphabet code from Bricks and Pieces magazine?

Somwtime maybe in the early eighties, I read a Bricks and Pieces magazine with a small panel showing the brick alphabet code and it would be great to have a picture of this if someone has it. This ...
1
vote
2answers
119 views

I need information on LEGO part #3001 in Milky White with Sparkles

Have a 3001 part i have come across with a color i've never seen before. It seems to be a milky white but with glitter in it. New style logo with pip on short side. Any ideas to where it came from?
6
votes
1answer
98 views

Preparations for outside display

I am thinking of using LEGO to make some outside yard art, (large minifig scale castle) and wondered what I should do to prepare them for being outside in variable weather conditions (in the Seattle ...

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