0
votes
1answer
16 views

Neutralize brick scent

I store some used Lego sets in household plastic boxes originally used for candy. I thought they were ideal, but now I found out the bricks have caught an unpleasant candy scent -- despite cleaning ...
3
votes
1answer
23 views

Where is this large beige motor with battery box from and how does it work?

I have a LEGO Technic motor with a built in battery box for 3xAA batteries (thus 4,5 volts). Could you help me identify it? What set does it belong to and how old is it? Colours are beige and ...
2
votes
1answer
56 views

Why can't I combine a EV3 Motor with a Technic frame in LDD?

It is easy and stress-free to attach a frame to a large motor in a vertical or horizontal manner as shown in the picture in real life. But I can't do the vertical version inside LDD. Anyone knows why? ...
0
votes
1answer
27 views

I need an NXT motor adapter

I'm trying to get an NXT motor adapter to this that I'm getting: If you don't recognize this, the parameters said : 80mm 2000 ±10% RPM 28.89 CFM Rifle 20.9 dBA Please tell me what this is ...
2
votes
1answer
52 views

How can I power my LEGO pneumatic engine?

I have just finished building a simple LPE, but have no means to power it. I live on a farm and have access to a small air compressor, would that work?
2
votes
1answer
34 views

What prevents a 12V motor, when pushed by hand, from providing DC electric out?

This question is somewhat related to a similar question I asked about whether pushing a 12V train motor (such as the one below) would damage it. See title "Set 7865: six wheeled Lego® train motor ...
0
votes
2answers
84 views

How much do you think these Lego's are worth?

I've got some very old LEGO brick from the 50's, and am wondering how much they are worth. I'd like an estimate because I know that they are now collectors items that might be worth something. Here ...
0
votes
2answers
36 views

What is the easiest option to start making instructions?

I'd like to make instructions for my kids, which they could read either on paper or on a tablet. What is the easiest option to achieve that, ideally using open-source software (and running on Linux)? ...
0
votes
0answers
35 views

EV3 SPIK3R Mission 5 Just keeps backing up

I completely built the Mindstorms EV3 Spik3r. Missions 1-4 worked fine. However, with mission 5, and using the pre-made program, the robot just keeps backing up, instead of facing the bug, shooting it ...
2
votes
1answer
38 views

How to measure green/blue reflected light on EV3?

As I know there is no way to turn on green/blue reflected light on EV3 color sensor. Is there a way to do it using NXT color sensor and EV3 controller? Or the only way is to use NXT controller ...
0
votes
1answer
29 views

pc program to receive data from EV3 via usb/bluetooth

I'm looking for a library to create a desktop program. It should receive a data from EV3 brick programmed by standard EV3 software. Currently I consider 2 approaches: 1. EV3 brick sends a bluetooth ...
1
vote
1answer
59 views

Use for “Technic Coupling, Tight” and “Technic Coupling 3,5-6 Ncm”

Power Functions set 8293 contains these pieces http://brickset.com/sets/containing-part-6025005 http://brickset.com/sets/containing-part-6036892 and they make the set much more expensive than just ...
1
vote
1answer
73 views

Vintage heads still in production?

Are vintage Lego heads with the classic grin still in production? I am having trouble deciding whether the head-with-grin piece (element ID 9336, called "MINI HEAD NO.1") which is produced today (and ...
0
votes
1answer
24 views

When was the RCX 2.0 released?

I know that the original RCX was released in 1998 and the NXT was released in 2006, but when was the RCX revision 2.0 released?
0
votes
1answer
48 views

Batman Arkham Knight Batmobile Instructions

Where can I find a set of instructions for the Lego Batman Arkham Knight Batmobile?
0
votes
0answers
17 views

Transfer BrickOwl wishlists to BrickLink

Is there an easy/automated way to transfer BrickOwl wish lists to BrickLink? I have wishlists on BO for each incomplete set I own and would like to move them over to see if BL can complete them ...
1
vote
0answers
16 views

At what voltage do the c1 and c2 lines run at when controlling a lego servo motor?

related: how to control a servo motor from a raspberry pi The raspberry Pi normally outputs 3.3 V signals from it's pins, however there are logic level converters for interfacing with higher-voltage ...
3
votes
2answers
55 views

Purchase a list of lego parts

If I have a list of lego parts (exported from Lego Digital Designer or Bricksmith) is there an easy way to purchase all of the parts either on Lego's Pick a Brick or on Bricklink? I know that I can ...
2
votes
1answer
127 views

What Technic vehicle is this in black and red?

Any help with the set this piece is associated with, would be appreciated.
2
votes
1answer
41 views

Making an atm With an EV3

So this is going to be long question because I want the best answers I can get. I am building an ATM using my LEGO Mindstorms EV3, but I ran across a problem. The problem is that I want to be able ...
2
votes
1answer
54 views

Value/Where to sell my old Lego collection

I'm sure you've heard this asked a million times but I have no idea where and for what price I should be selling my old collection for. Things I do know about what I have: I'd assume they're ...
0
votes
2answers
31 views

What are good DUPLO projects for around 2 year olds?

It is always good to have a bunch of (short) building projects to suggest to our toddlers. Here I would like to collect some easy ones for DUPLO. I'm not particularly interesting in creating ...
1
vote
0answers
16 views

Education EV3 Software Site Licence - installation on teachers computers?

WE've recently purchased some mindstorms ev3 education sets plus the site licence of the Software. in Switzerland many teachers do their preparations at home, so my question is, am I allowed to ...
4
votes
1answer
104 views

What is this snapping brick for / which set is it from?

I've found this DUPLO brick: The red part can be pushed in and snaps out when the button on the top is pressed: Any idea which set this is from or what it could be used for?
0
votes
0answers
19 views

COMPARING LEGO PARTS [duplicate]

My son in 5 years old. We startted with Duplo, then ı bought classic lego (from 4 to 99 years old). Classic parts are smaller than Duplo, now ı want to buy junior, my question is about sizes of junior ...
1
vote
1answer
84 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 ...
0
votes
0answers
33 views

Firmware problem or EV3 problem

I've gotten EV3 recently. Sometimes after I download the program it doesn't run and it's not possible to stop it, so I have to reset EV3 to update and download firmware! It occurs many times! I don't ...
0
votes
0answers
48 views

What's the first block in MoveAbsolute for programming the T-Rex, in The LEGO MINDSTORMS EV3 Laboratory book? [duplicate]

On MoveAbsolute2 and 1 for The LEGO MINDSTORMS EV3 Laboratory book by Daniele Benedettelli, programming the T-Rex, I don't know what the first block is, can i please have help?
3
votes
0answers
72 views

Any issues with this non-standard gear combination of 12t gears?

I don't see any "accepted" gear ratios for a stud-less direct-diagonal gear combination on sariel's excellent gear coupler but by shifting 12t gears such that they mesh off-center, it seems to work ...
0
votes
1answer
46 views

Color Sensor/hi-tech and EV3

I want to create a line follower by EV3 using hi-tech color sensor without using switch! :( I tried some former ways but the robot cannot follow the line very well! can anyone guide me?
1
vote
1answer
49 views

EV3 Error and VM Program Instruction Break

I'm making a program which is very complex and large but it does not contain any Arrays in it. Weird thing is, last night it worked fine but today when I downloaded the exactly same thing into the EV3 ...
0
votes
2answers
24 views

EV3 - At what time DIRECT_REPLY is sent by brick?

For example: I've sent DIRECT_COMMAND_REPLY to rotate the motor for 720 deg. When EV3 brick should send reply: before motor finished rotation (right after my command was received) or after motor ...
1
vote
1answer
89 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 ...
2
votes
1answer
60 views

Lego 3804, Mind Storms Robotics Invention System 2.0

I gave my grandson (11 years old) the lego 3804 mind storms robotics invention system 2.0. he built a couple things and when he tried to install software to program what he built, the computer would ...
1
vote
1answer
43 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 ...
3
votes
1answer
150 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) ...
3
votes
0answers
75 views

Where can I find 'Dolphin', the 3D model to LEGO software?

It was created at the École Polytechique Fédérale de Lausanne. But it seems it is no longer available for to download. Does anybody knows what happened?
2
votes
2answers
93 views

Is there a good way to buy molded LEGO boxes?

I'm considering some new storage options, and there are some official LEGO boxes that I'd like to use as they already fit in my existing shelving system. The following sets contain the boxes that I'd ...
0
votes
1answer
50 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 ...
2
votes
1answer
97 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.
3
votes
1answer
35 views

What year did the minicon “micro BrickCon” first appear at “BrickCon”?

It seems like minicons (a minicon is a Lego display consisting of minilander figures looking at miniland scale tables populated by microscale MOCs) are popping up everywhere lately. The last known ...
1
vote
1answer
84 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.
4
votes
1answer
142 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 ...
0
votes
1answer
98 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 ...
1
vote
1answer
107 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 ...
2
votes
2answers
102 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: ...
1
vote
1answer
118 views

What is wrong with a Lego pneumatics system that won't go?

I own a LEGO Technic Unimog U-400 (part number 8110) and have been very pleased so far with the performance of its pneumatic system. However, after storing for just a month or two (after a good 5+ ...
3
votes
1answer
60 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.
1
vote
1answer
95 views

Can you use a beveled gear as a pinion?

I would like to use the PF servo motor for steering, however it is very large - I was playing with the idea of having it mounted vertically, and then using bevel gears to change the direction of the ...
1
vote
0answers
36 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?

15 30 50 per page