0
votes
1answer
79 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.
0
votes
4answers
61 views

We would like to stick lego bricks to metal - best glues please

The Scouts are making some Christmas decorations using LEGO, and we need to stick them on to some metal stands. Could anyone please advise the best glues and process (e.g. sanding, etc.) to join ...
1
vote
0answers
37 views

Identifying Lego kits from unopened bags for library

I'm a librarian and we recently received one of the Junior Maker Lego kits that LEGO distributed to 15 libraries in each state. It's a wonderful kit and includes a lot of basic blocks along with many ...
3
votes
2answers
105 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)
5
votes
2answers
199 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?
2
votes
2answers
92 views

Can't get EV3 to work with touch sensors

My FLL team just got a couple of EV3 sets and the kids were trying to program a simple switch that has the robot drive into a wall, back up, and turn right once the touch sensor in the front is ...
14
votes
5answers
28k views

What is considered the most valuable LEGO set?

Which Lego set is considered to be the most valuable set to own? I'm not talking about the most expensive set, and clearly it has to be out of production already, but when trying to collect complete ...
3
votes
2answers
66 views

How many ways can six 8-peg lego blocks of six different colors be combined?

I have seen the number quoted as > 650 billion. The quote is from a Danish mathematician, Soren Ehlers. Intuitively, this does not seem correct to me. Any mathematicians/statisticians out there who ...
0
votes
2answers
29 views

What kind of design is comparable to these programming concepts?

I understand this may sound like a weird question, but bear with me here, OK? I'm getting ready to teach some kids introductory computer programming. We're going to use Scratch, a drag-and-drop ...
0
votes
1answer
101 views

Where will the World First Lego League be held in 2015?

Every year First Lego League (FLL) is held in 3 different countries. I know that the world festival will be held in St. Louis, but where will the other two be? Last year it was held in Germany and ...
8
votes
1answer
704 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
1answer
15 views

NXT brick not executing programs correctly

I have an issue that I am hoping someone might be able to resolve: We're using Mindstorms in the classroom as part of a STEM program and have one NXT brick that wont execute programs correctly. The ...
3
votes
2answers
37 views

Gearing down a PF XL

I'm looking for the best way to gear down a Power Function XL. I need to achieve a very slow output RPM (less than 1-2 RPM). I've tried a 625:1 gear (trough 40:8 gear). Can someone link to a well ...
2
votes
1answer
30 views

Lego EV3 doesn't respond to direct command

I tried to execute command (via bt) play tone: play_tone = '\x0F\x00\x00\x00\x80\x00\x00\x94\x01\x81\x02\x82\xE8\x03\x82\xE8\x03' # send commands to EV3 via bluetooth with ...
3
votes
1answer
42 views

Is it possible to edit a my block input parameter value?

I have created my blocks but want to change the input parameter to a negative. Is this possible or must all the myblocks be re-written?
8
votes
4answers
5k views

Are there any lego base plates that are compatible with duplo?

I'm thinking of making a lego table but my 2 children both use different lego. My oldest uses normal lego and my youngest uses duplo. Just wondering if there is a base plate that both types of lego ...
3
votes
1answer
603 views

What are these bricks with filled interior and holes/tubes going through?

I recently bought at haul and found a bunch of these regular sized bricks. Can anyone identify the for me? They are 2x4 bricks, but with holes in the side of the bricks: From: ...
4
votes
3answers
88 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?
3
votes
1answer
53 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 ...
5
votes
2answers
234 views

Any way to create a gear+chain, like for a bike?

I would like to create a LEGO bike. I can imagine how most of it would work, but i'm stuck at the chain. I need a way for the turning pedals (at one spot) to cause the wheel (in the back) to spin ...
19
votes
4answers
2k views

Is there a logic to the way The LEGO Group fills the plastic bags?

When opening a new box, most of the pieces are in closed plastic bags, and sometimes inside those plastic bags is another plastic bag for smaller pieces. I find the pieces, for the most part, rather ...
6
votes
1answer
94 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 ...
4
votes
2answers
50 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 ...
6
votes
2answers
117 views

Fixing poorly applied stickers

Does anyone have any tricks to removing a sticker and reapplying, after a significant period of time? I recently purchased a lot of sets from 2000-2010 range, and the stickers look like they were ...
15
votes
4answers
4k views

Are all the Magnet minifigs now glued on and how should I remove them?

A couple of years ago (around 2010 I think), I bought a number of the Star Wars magnet sets, as they looked like a (slightly) economical way of buying a number of specialist characters (including the ...
4
votes
1answer
52 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 ...
7
votes
4answers
6k views

What are some examples of advanced train layouts possible with the PF train sets?

I recently got my first train set, the Constitution Chase, and it has sparked my imagination for building train layouts. My 3-year-old son has a small collection of wooden trains and we enjoy building ...
2
votes
1answer
173 views

How to locate objects, and move towards them, without pre-programming the path

So I need to find objects in an enclosed area, I have access to the standard set of NXT sensors, i.e. ultrasonic/light. However, the ultrasonic sensors seem to be very unreliable and erratic, in ...
3
votes
2answers
127 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.
8
votes
3answers
2k views

How to start with technic?

I have bought myself the technic set 9393 Tractor. I really like the model and I want to dig deeper into the Lego technic universe. I am not focused in building pre-designed models (although I enjoy ...
7
votes
3answers
965 views

How to Make a Lego Claw Arm?

I am trying to build a lego claw arm to pick up stuff that is out of my reach and I need some ideas on how to design it. I would like a mechanism to be able to open and close the claw from the ...
2
votes
1answer
208 views

What's the sight of the ultrasonic sensor according to the distance of the object?

Hey I'm programming a sumobot for a first-year university Civil Engineering project. We should need the sight of the ultrasonic sensor according tot the distance of an object. For example, the sensor ...
0
votes
3answers
180 views

Will they ever make LEGO The Amazing Spider-man 2 sets?

I realized that they released an exclusive minifigure of The Amazing Spider-Man 2 in the San Diego Comic Con but I am still wondering if they will ever make LEGO set(s) based on the movie.
7
votes
1answer
413 views

Emmet's couch model in official sets different than the movie?

Lego's official building instructions for The Sea Cow set include building instructions for building Emmet's couch from The Lego Movie. Are there differences between this model and the one actually ...
1
vote
1answer
154 views

NXT program not running

We have multiple NXT Bricks. We can read sensor data and motor degrees from View. Some are running FW 1.31, others FW 1.28. When we try a simple 5-step NXT program, the motors will not turn. We tries ...
2
votes
1answer
67 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
1answer
186 views

Is there a microphone that works with Mindstorms EV3?

I'm planning to program my EV3 robot to do voice chat over VOIP using ev3dev and a Debian program. Is this possible? Are there microphones known to work with EV3, and has anyone had experience using ...
2
votes
1answer
77 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?
2
votes
1answer
172 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.
3
votes
2answers
104 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 ...
3
votes
2answers
170 views

IDE recommendations for EV3 programming

Does anybody have any recommendations for non-GUI programming of the EV3 unit? I'm impressed by the LabVIEW software, but as a professional C# and VB.Net programmer (with C, C++ experience), I find ...
2
votes
1answer
188 views

can't send multiple commands to EV3 using Python

I want to use Python to send commands to an EV3 brick. In C++ things work as expected - for instance, this starts the motor on port A and then stops it after a while: #include <unistd.h> ...
0
votes
1answer
46 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.
1
vote
1answer
93 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 ...
1
vote
1answer
25 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 ...
1
vote
1answer
100 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, ...
9
votes
2answers
571 views

Is it possible to add the power functions to Western Train Chase?

I recently got the Red Cargo Train and it's a great Lego set but a Cars themed train going around my Christmas tree would be even better. Has anyone gotten the power functions to work on the Western ...
3
votes
2answers
123 views

Help identify mystery piece and set it could go to

more mystery parts from the bags of Legos we bought. I can't find a lego symbol on it. Is it a Lego or some other brand?![enter preformatted text here][2]
2
votes
2answers
877 views

Is there a fix for an NXT reporting “File error!” when running an EV3 program?

I downloaded the new EV3 software from Lego and installed it on Windows 7. The EV3 software runs. I plugged in an NXT using a USB cable. EV3 can edit the memory on the NXT and remove ...
1
vote
2answers
138 views

How to install NXT Firmware 1.28?

Lego is giving 1.31 from their website but I need 1.28, how can I install it?

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