1
vote
0answers
29 views

Block Platform parameter is not instanciated

I used Simulink to write a program for LEGO Midstorms NXT. I can post the design if needed. The problem is that when I want to run it on hardware, it gives the following error: Lego mindstorms NXT ...
13
votes
2answers
3k views

What is this Lego piece - Yellow with handles and an octagonal section?

It clearly says Lego on it, but I have no idea what it is. The only number inside is 4-01.
5
votes
1answer
256 views

How to get good color readings from the color sensor?

What type of setup is needed to get good color readings from the Mindstorms EV3 color sensor: Shape of object? Size of object? Distance to object? Color of background?
3
votes
1answer
221 views

Need help identifying extra large Lego figure from 2003

I came across these LEGO figures at an estate sale and have had no luck trying to find out what they are called. They are much larger than a regular minifig but have a shaped foot plate to attach to ...
2
votes
1answer
44 views

How to import an unofficial parts archive into LDraw?

I recently created a basic EV3 robot in Lego Digital Designer and exported it as a LDraw file. When I opened the LDView file, the EV3 elements were missing. I then proceeded to download an unofficial ...
3
votes
1answer
85 views

Custom EV3 Block: “Unable to compile…” (“string subsection”)

I am attempting to make a custom block according to the EV3 Block Developer kit (found here). I was able to create a simple block that returns the length of a string. This is what it looks like: (The ...
1
vote
1answer
53 views

How would I make a decal for a 2x2 dome brick or a 2x2 round slope brick?

I am looking to make a decal for a custom droid using either the R5-series head or the regular dome R2/R3/R6/R7/R8 head. However, I do not know the process for creating droids. Does anybody know how?
4
votes
1answer
84 views

How large is the face of a 2x2 45º brick?

I am attempting to make a decal for a roof tile, sort of like the computer face on certain bricks of the type. However, as there appears to be no template, how large is the face of a 2x2 45º brick?
2
votes
2answers
85 views

NXT Motors curving to the right

The NXT motors have been curving to the right by about 10-20 degrees. We have checked the program, no curves. We have checked the wiring, but it is also plugged in fine.
2
votes
1answer
58 views

Have Multiple Inputs to Programming Block

Originally, I had a simple program to move until the robot hit a wall, then it reversed and turned and moved again, repeated to infinity. It works by turning the motors on, waiting for input from the ...
1
vote
0answers
52 views

Tufts MAZE LabView Program Will Not Run on EV3

Through the 2012 LabVIEW for LEGO software package, I found an example of a maze from Tufts. I cannot get it to run on an EV3. It appears to just constantly execute the initialization. How can I ...
9
votes
1answer
175 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 ...
1
vote
0answers
73 views

Why are there only four elemental artefacts? [closed]

What I mean by this is that there are only 4 golden weapons (Fire, lightning, earth and ice), 4 elemental weapons (the same elements), 4 elemental forges (the same ones) 4 obsidian weapons (again!). ...
1
vote
0answers
50 views

RCX + java + usb-to-serial

I am trying to get an old RCX working with leJOS. I already have it working with NQC and BricxCC. While NCQ/BricxCC seems to recognize my usb-to-serial (which appears as "COM5" to the OS), the leJOS ...
1
vote
1answer
141 views

What Lego set does this belong to?

I want to find which LEGO set this unusual piece belongs to. I have 10? I have a few sets from the late 1980's and the rest are from the 1990's. I have looked and looked. Hope you can help! It ...
1
vote
1answer
48 views

Lego RCX hardware schematic

Where can I find the hardware schematic for the Lego RCX brick? I spend a lot of time but unfortunately didn't find any useful information.
0
votes
1answer
116 views

Raw RGB data to Color?

I'm trying to convert the raw RGB values from a Colour Sensor into HSL but it doesn't seem to be working: R = rgbn[INPUT_RED]; G = rgbn[INPUT_GREEN]; B = rgbn[INPUT_BLUE]; var_R = ( R/255 ); var_G = ...
1
vote
1answer
165 views

Identifying Lego set from 1980's

Can someone please help me identify this Lego set from the 1980's? I remember building a house, work shed/garage and some type of vehicle. The base plate is light gray. It came with 2 minifigures, ...
0
votes
2answers
143 views

Programming NXT color sensor with NXC?

I am programing Lego Mindstorms NXT 2.0 color sensor in BricxCC. I already have RGB data with the command ReadSensorColorRaw. I heard that it is easier to get the colour from HSL format. I've tried a ...
4
votes
1answer
46 views

Can I share/download a wishlist on Bricklink?

I have a whole set in a wishlist in Bricklink and I would like to share it with some friends. Can I either: Share the list via Bricklink so they can use it directly. Download it in XML so they can ...
2
votes
2answers
133 views

What's the circle piece in this MOC?

I saw a moc from here. But have no idea what the piece it use on the arms of the robot, and on the guns.
0
votes
1answer
41 views

How to switch an NXT sensor port by a motor port? [duplicate]

Me and my partner are finishing up our robot for the RobotCup and we desperately need one more motor port. We will only use 3 sensor ports, so my question was if there was even the slight chance that ...
1
vote
1answer
79 views

EV3 motor TACHO signal connection. Hardware schematic questions

I'm trying to understand EV3 motor TACHO signals circuit on the EV3 hardware schematic. Please look at the image below. Two things I cant understand. On the left side the TACHOA0 input is ...
3
votes
1answer
50 views

Remove decals from LEGO Friends mini-dolls

I am trying to remove the decals from my LEGO Friends mini-dolls. Does anyone have any suggestions for doing this? I tried rubbing alchaol on a minifigure once, and it made it all gross looking, so I ...
3
votes
0answers
61 views

What electrical contact material is used for PF Connectors?

I'm designing my own PF electrical connector and I want to have the same functional characteristics as the original Lego brick. Could you please let me know which electrical contact material is ...
2
votes
1answer
173 views

The most amount of pieces [ever] per set

Which set number had the most Standard LEGO elements to date? Technic LEGO elements to date?
1
vote
2answers
32 views

Bluetooth Conection PC-NXT1-NXT2

I want to connect, via Bluetooth, one PC with a NXT brick and then have that NXT communicate with another NXT. So I send a message from the PC to NXT1 and have NXT1 send a message to NXT2. Is this ...
1
vote
1answer
50 views

Bluetooth communication between computer and nxt using RobotC

I'm thinking starting a project involving controlling the movement of a NXT robot from the PC using RobotC. Is it possible? Does anyone have a simple code solution?
1
vote
2answers
224 views

How to find out which set contains a higher plate percentage?

I want to gather various types/colors of plates to do some mini model MOCs. How can I find out which set has the best plate percentage or price per plate pieces? I know there are a lot of ways to ...
3
votes
3answers
311 views

Why doesn't lego make many 2x2x4 Pieces?

I'm just wondering if anybody here knows where I can get some 2x2x4 pieces ... It seems that Lego doesn't make many just standard bricks that are 4 high ... I've found a few singles here and there on ...
0
votes
1answer
44 views

What does 191767 mean in “Paper, Cardboard for Set 4336 #1, Scala Cat (191767)”

In BL http://www.bricklink.com/catalogItem.asp?P=4336cdb01 This cardboard's name is "Paper, Cardboard for Set 4336 #1, Scala Cat (191767)" What does "(191767)" mean here in the description?
2
votes
1answer
123 views

How can I rotate an EV3 motor an exact number of degrees using RobotC?

I'm trying to rotate the motor of an EV3 by an angle of 50°. I can't. How I can rotate a NXT/EV3 motor by a given angle using RobotC?
2
votes
1answer
78 views

How can I use bluetooth on my phone to run a program on the EV3 brick?

I tried the Commander app but it seems to just let you control individual motors. I would like to run the various programs I have made using an input on the phone through Bluetooth Is this possible ...
1
vote
1answer
158 views

Issues with set 10234 book 3 pg 43

The white wing-like piece continues to pop off when placed. Has anyone figured out a fix for this or am I doing something wrong Instructions 3 & 4: src: ...
3
votes
1answer
100 views

What does “No Friction” mean in Parts “Gear with 8 Teeth Wide, Notched and No Friction”

http://www.brickowl.com/catalog/lego-gear-with-8-teeth-wide-notched-and-no-friction-11955 As title, what does "No Friction" mean in the part "Gear with 8 Teeth Wide, Notched and No Friction" ?
5
votes
1answer
140 views

Where are the electric pieces for 42029?

I was building LEGO 42029 Customized Pickup Truck, when I got to a page where I needed electrical parts, such as the battery box and the wires. I checked and these pieces were NOT included. Should ...
2
votes
2answers
87 views

What logos appear on Duplo brick studs?

Do all regular Duplo bricks have the word "Duplo" written on their studs? If not, what variations are there?
3
votes
2answers
161 views

Is this a real Duplo Train Base or fake?

I'm new to LEGO, so forgive me if this is a simple question. I purchased a lot of 30 Duplo Train Base from eBay. Below is the picture that accompanied the listing. There is a disclaimer stating: ...
-3
votes
1answer
155 views

Way to build LEGO spaceship with regular bricks [closed]

How do I build a spaceship without buying a spaceship set? With a limited amount of bricks, like, say 300 2x4, 100 2x2, and about 20 2x1 bricks. I'm looking for instructions.
0
votes
0answers
19 views

Where to buy 'retired' products [duplicate]

I was searching 'minifigures' and came across: http://search-en.lego.com/?cc=GB&lang=2057&q=pirate&ns=1&x=0&y=0 where some products are 'retired'. How would I go about acquiring ...
2
votes
1answer
72 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?
3
votes
1answer
61 views

How to upload an XML file to wishlist in bricklink

I am triying to upload an XML file with all my brick wishlist to BrickLink. However, even if I follow the instructions on the webpage, it never seems to find the product in the catalogue. If I ...
1
vote
1answer
78 views

Buy an specific set of bricks [duplicate]

I have a specific list of bricks for building a LEGO set that I found online, with approximately 300 pieces and around 70 different blocks. I have seen that one of the best ways for buying LEGOs ...
3
votes
1answer
132 views

How to fix The LEGO Star Wars Corellian Defender set

I was playing with my Corellian Defender which took me up to 4 days to build. It broke unfortunately and I am very sad since I love it very much. I need some tips to rebuild it back :(
4
votes
1answer
211 views

Is it possible to use Bluetooth to connect two EV3 bricks using RobotC?

For example to send a numeric value from one to the other?
3
votes
1answer
122 views

EV3 controlled by 8879 speed control through IR sensor

Is it possible to send commands to an EV3 brick from the Power Functions Speed Control remote? Would I have to interpret the raw sensor values to do this? Are there any references that would help?
1
vote
2answers
59 views

Is there a guide that has the number and kinds of pieces per set? [duplicate]

Is there a guide that has the number and kinds of pieces per set - for example 8 pieces of this and 14 pieces of that? I am trying to sort out a large container of multiple sets. I have thousands of ...
8
votes
1answer
275 views

Lego Escher structures

How are these done? Is it trick photography? With some kind of giveaway background it should be obvious, but I notice they are not us telling that.
3
votes
1answer
233 views

Old sets, new bricks

Are there sellers out there that compile old discontinued Lego sets with new bricks? In other words they source new bricks and instructions to put together old discontinued sets. Thanks
5
votes
2answers
125 views

Is it possible to make inverted slopes with solid studs

Many(all?) of the inverted slope pieces have solid studs and hollow studs( e.g. 3665) and a void around the stud. This(void & hollow) looks very inelegant, is it really that difficult to make ...

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