1
vote
2answers
400 views

How do I make a remote control car without LEGO motors?

I have no LEGO motors In my collection, what are some household materials I can use?
1
vote
0answers
48 views

How do you display EV3-G images properly on an NXT screen? [closed]

When I use the EV3 programming software to put an image on the screen of an nxt, it cuts off 3/4 of the image. How can I stop this from happening?
4
votes
1answer
247 views

Please help me identifying these spaceship parts - big sloping ring

Which lego set do these parts belong, I have a full box of random pieces, and I wish to build something starting from this. Thanks
3
votes
2answers
188 views

Bulk LEGO as presents

I've bought a couple of bulk LEGO bundles with the idea of gathering up the identifiable sets, printing out the instructions (via BrickSet or similar) and then giving them as presents to my kids over ...
2
votes
1answer
199 views

Hanging template for Large Minifig Case

I've been happy to see LEGO came out with a way to display the myriad of minifigs out there: And I was also very happy to find that I can hang these on the wall with the convenient eyelets on the ...
6
votes
3answers
2k views

What are the inspirational resources for building with Duplo?

I am interested in knowing what are the inspirational resources for building with Duplo, so I can spend more quality time with them. For example have Lego ever released Duplo building instructions ...
15
votes
8answers
50k 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 ...
1
vote
1answer
88 views

Is there a way to buy a customized minifig?

I have a design I want to replicate into a minifig. I also want to add additional accessories to it (i.e. a calculator and glass beaker). Is there a place I can order online to get this done? Is there ...
16
votes
3answers
770 views

How should I store unused stickers?

What is the best way to store stickers for future use? I have some unused LEGO sticker sets in plastic bags. The one on top in the bag has become brittle and is flaking.
4
votes
1answer
176 views

Can you ID this part?

I am trying to id the three grey bars on the left-hand side of the image. Any ideas? Many thanks.
6
votes
1answer
418 views

Does soaking Lego pieces in isopropyl alcohol discolor or otherwise damage them?

I need to clean my Lego including minifigures, printed pieces and cloth pieces from smoke (apartment fire). I have found that soaking the pieces in isopropyl alcohol removes the smell, but am I ...
1
vote
0answers
85 views

What are the steps in installing the EV3 block developer Kit?

I've downloaded the block developer kit. How do I incorporated into my Mindstorms software?
1
vote
0answers
35 views

Unable to turn on the EV3

I just can not turn on the EV3 with SD card.I only turned on it twice. The EV3 stops at [-leJOS EV3] UI,and don not go to the next step. I charged the battery,reinstalled the software inside of SD ...
2
votes
3answers
2k views

The Mindstorms EV3 Software crashes on OS X Yosemite 10.10.3. What do I do?

It's crashing on startup which is really irritating. When debugged with terminal it says this: Unhandled Exception: System.UnauthorizedAccessException: Access to the path is denied. [ERROR] FATAL ...
2
votes
2answers
88 views

RCX 2.0 Firmware downloaded successfully but “Run” does nothing

I recently was able to install RIS 2.0 for the first time since I just got a 32bit Windows 7 machine, I got the IR tower to download the firmware to the RCX 2.0 and it showed exactly the same screens ...
4
votes
2answers
195 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 ...
2
votes
2answers
188 views

Identify age of parts from yard sale

I purchased a box of LEGO bricks from a yard sale. Some of the 1x6 bricks are hollow with 2 small slants in them. Other 4x6 plates are very thin with square holes in the bottom. It also came with ...
3
votes
1answer
130 views

Can a EV3 program run simultaneously with the Running Robot commander app?

Is it possible to run the Robot Commander app and a program on the EV3 brick at the same time? If so how would it be accomplished?
18
votes
3answers
792 views

What are the female parts called?

What is the proper term for the "female" section of the piece that the "studs" insert into? I have heard "pipes", "tubes", "underbits". Is there an actual term for the female section?
6
votes
2answers
263 views

What about these old houses?

I recently inherited two old lego-buildings. Unfortunately I have virtually no information about the history of them other that they been part of the inventory of an old hardware store closed a decade ...
1
vote
1answer
215 views

“file error!” appears on nxt why?

I tried to upload this program to my NXT, but for some reason I am not able to run it properly as it terminated with the message file error!. No idea why. I am trying to read a .txt file into a char ...
3
votes
1answer
60 views

fgetc() moves pointer one step forward

I have opened a file using handle = fopen("rw.txt"). The file consist of 3 values which is separated with spaces ex: 12 23 34 using isspace(fgetc(handle)) Problem here is that fgetc() increments ...
2
votes
1answer
115 views

I need help Identifing this set by the picture

I have a blurry picture of a set I found at a LEGO fair, and I would like to know what it is: Thank you.
3
votes
2answers
162 views

Need help identifying this set

These came in a clear bag labeled with the number 2. Dated 2011. Thanks in advance!
3
votes
1answer
188 views

Overview of Engineering Principles incorporated in Technic LEGO sets

I run an after-school technology education program and want to expose kids to real-life engineering by means of having them build commercially available Technic kits which we then deconstruct and ...
1
vote
1answer
274 views

Linear Actuator of the boom of 42006 jams

I just built a 42006 excavator, and the Linear Actuator jams such that it can't be rotated. I think that the overly sharp angle of the u-joint at the top of the boom is the reason. Is there a ...
2
votes
2answers
106 views

Gibberish Sound Effect

I am now creating my first LEGO stop motion animation with sound effects. I do not want to use a specific language for them speaking. Instead, I am using subtitles. For the talking sound effect, I ...
2
votes
1answer
188 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 ...
11
votes
1answer
515 views

Trains overview image

I'm looking for an overview image of all trains ever released by LEGO. With trains I mean train sets containing locomotives and wagons that run on train tracks. There is a beautiful image from Jeroen ...
3
votes
1answer
123 views

Mindstorms EV3 3D building instructions no longer working in Chrome

Lego Mindstorms EV3 building instructions in 3D (so that one can rotate the model around and stuff) are available. This used to work fine on my machine in Google Chrome. However, I can no longer get ...
3
votes
1answer
162 views

No response when controlling the Mindstorms EV3 brick over Bluetooth

I am trying to control the EV3 using direct commands over a Bluetooth connection. There are no issues pairing the brick with a PC or phone, and opening the serial connection works fine, but sending a ...
4
votes
1answer
141 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 ...
3
votes
2answers
226 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 ...
9
votes
5answers
8k views

LEGO brick competitors?

I'm trying to find all the competitors to LEGO. I know there is MegaBloks. What are some more? The base idea is that they should be bricks and they need to connect to each other like LEGO. However, ...
1
vote
0answers
80 views

After adding a MyBlock icon to the EV3 palette of MyBlock icons, how can the new icon be associated to an existing MyBlock?

After following the advice given in adding a MyBlock icon to the EV3 palette, can the icon be associated to an existing MyBlock? Something better than copy/paste the contents of the existing MyBlock ...
2
votes
1answer
113 views

Large blue windscreen with shuttle decal

Can someone help me identify this part, I got it in a bulk lot and want to know what sets are in there.
8
votes
4answers
7k views

RCX firmware download problem

I hope someone can help me with a problem with getting an original RCX 1.0 system working with a current PC. I bought the RCX 1.0 system back in (I think) 2000 but its been in storage a long time. In ...
1
vote
1answer
284 views

EV3 with NiMH batteries

Could I use 6 NiMH 1.2V batteries and keep pressed the small black circle in the battery compartment in order to adjust the battery gauge and low battery alarm?
1
vote
1answer
133 views

How good are used lego bricks on bricklink?

In my life I've only ever used new Lego bricks; however, I'm now interested in purchasing large quantities of bricks and Bricklink's used section has significantly cheaper prices. I know that the ...
1
vote
1answer
188 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 ...
4
votes
1answer
445 views

What are the differences between NiMH and Alkaline batteries for the EV3?

Currently I am using six rechargeable batteries for my Lego Mindstorms EV3. A few seconds after I start a motor the EV3 gives a notification that that the battery is low. I know that good batteries ...
5
votes
1answer
85 views

What parts are include with this light blue bike?

I need to find the part numbers of parts on this bike.
10
votes
6answers
27k views

How to fix Mindstorms Error Code 1003

I am using the Lego Mindstorms NXT Education Kit, software version 2.1. Everything was working fine writing programs and downloading them to the robot until all of a sudden when I tried downloading a ...
0
votes
0answers
12 views

NXT error code 10003 on startup [duplicate]

I run Mac OSX Mountain Lion on my computer. When I got my new computer, I had to reinstall Mindstorms NXT because my disk was scratched and therefore corrupted, I had to download it from the ...
1
vote
1answer
123 views

Trying to ID a piece.

Light grey, approx. 1 in. X 1 in. Shaped like a bottom jaw or a digger shovel. It has a half round hump in the middle of the piece.
15
votes
3answers
10k 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. ...
6
votes
2answers
159 views

Making an ATM with an EV3

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 to input the amount of money that I want to get out of the ATM but I can only have ...
6
votes
2answers
172 views

Selling custom LEGO image mosaics using original LEGO bricks without breaking LEGO's Fair-Use Policy

We have designed software and an accompanying site to convert images into 48x48 (or larger) LEGO mosaics; we use the current LEGO color palette, use image dithering to improve color availability, ...
2
votes
3answers
109 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)?
5
votes
1answer
203 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?

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