4
votes
2answers
268 views

Ultrasonic problems with the red and blue balls?

I'm still new to NXT, I try to make the robot locate a ball using the ultrasonic sensor, while there I should be in a square area marked by white color. How can I make the robot locate the object (by ...
4
votes
1answer
156 views

Gunner bot programing

I just build the RCX Gunner Bot using the instructions from this web site. I had to build something different to the one we built in the class, I added a touch sensor and light sensor, so the bot ...
4
votes
1answer
238 views

Is there only one lego Rohan soldier? Why?

As far as I can tell, Lego has released only one set containing a regular rank-and-file Rohan soldier, that is Uruk-hai army. Is this correct? Why is it so?
4
votes
1answer
378 views

Program a full rotation of a NXT motor in X seconds

I'm interested in mimicking the functionality of the Arqball Spin, at $60 it isn't cheap so I'd like to make the most out of my Mindstorms parts. I'd like to use NXT-G to program a motor to rotate ...
4
votes
1answer
303 views

LEGO Scalextric?

I have a couple of these car parts in my collection but cannot find anything about them. They are copyright 2003 and show a number 3213 on the back axel. Interesting is that they have 3 electrical ...
4
votes
1answer
2k views

Can you program an RCX using the Mindstorms NXT 2.0 software?

I was asked to teach a robotics class and found several RCX bricks in storage. Can I use these bricks with the Mindstorms NXT 2.0 software? If not, what would be the software I would need to use the ...
4
votes
1answer
161 views

Measurements (LDU) of Lego tracks Set 151

I have an old set of 7851 curved tracks. I want to use the outer tracks (the ones with the bumpy surface). If I was to put one end down on a baseboard so that is tangent/parallel with the grid of ...
4
votes
1answer
154 views

Are there any components compatible with EV3 that are more powerful and durable?

Are there components compatible with EV3 like motors, sensors, brackets, other details that I can easily connect to an existing EV3 main block and build something to do real-life tasks? Like ...
4
votes
1answer
365 views

Has Lego Box 5508 been discontinued?

The Lego Deluxe Box 5508 seems to be out of stock everywhere in the UK. I was hoping to get this set for my kids for Christmas, but it is nowhere to be found. Has it been discontinued? Or do they ...
4
votes
2answers
166 views

Lego MOC joining query

I have a building query. As you see the picture (attached). I really don't know how the creator can attach the "3829c01" steering wheel to the "4070". I try so many rod like parts can't get through ...
4
votes
1answer
160 views

Does anyone make a self-driving car?

Mapping and localization are the hottest trend in robotics today. And what is the most exciting is they can be both implemented on a low-cost robotics kit like LEGO Mindstorms! I tried to make a ...
4
votes
1answer
283 views

Where to find older sets (eg. Classic Space)?

Can people share their experiences on how they locate older sets? Have you had luck with flea markets, garage sales, thrift stores, etc.? Or is everything done through eBay and BrickLink? Any comments ...
4
votes
2answers
241 views

Technique for multifacteted roof without 3049

I'm working on a project with a fairly complex roof in Dark Bley. In many areas, it seems to be necessary to use part 3049: Unfortunately, this part doesn't appear to have ever been released in ...
4
votes
2answers
3k views

Compatibility EV3 software with NXT brick - known limits?

Lego says I can I use the new software to program old NXT bricks: Q: Is EV3 backwards compatible with NXT hardware? A: Yes. You can program your NXT intelligent brick using the new EV3 ...
4
votes
1answer
358 views

Strongest gear configuration

I'm building a (what I hope to be) high-speed car using two PF-XL motors together and some gearing up. However, there's a point where I have to rotate the axle with power (that comes from the 3 speed ...
4
votes
1answer
406 views

Best sensor for balancing inverted pendulum

I want to build a balancer for an inverted pendulum. Which of the following sensors is best suited for detecting the tilt? Accelerometer Gyroscope Angle sensor
4
votes
1answer
567 views

What is the difference between the two train motors 8866-1 and 88002-1?

At the Lego store the other day they were talking about a "more powerful" train motor for the Maersk train (I was asking about adding a second motor to the red cargo train so it would go uphill). But ...
4
votes
1answer
354 views

Why did the dark grey color of bricks change? [duplicate]

Possible Duplicate: What is the bley (blay) color? 15 years ago there were 2 shades of grey - light and dark grey bricks. Some years ago, hue of new produced dark grey bricks shifted ...
4
votes
1answer
341 views

Is the Lego 8884 IR Receiver compatible with earlier IR Speed Remotes e.g. from set 7897?

I'm thinking of buying the new Train power function, e.g. 8884 IR Receiver, 88000 Battery Box, and 8879 IR Speed Remote. However I already have the set 7897, is the Speed Remote from this set ...
4
votes
1answer
418 views

New ways of connecting levels of multi-story modular buildings

Compare these two instructions from the Green Grocers and Pet Shop modular building and you may notice (other than the background colour) that the top of the walls of the buildings are both arranged ...
4
votes
1answer
632 views

Any good Lego body decal templates or printing services

I was wondering could anybody point me in the direction of a good online service that prints minifig decals? I have no problem creating the designs etc but getting somewhere to print them is very ...
4
votes
1answer
202 views

NXT motor power accuracy

When turning the motors, how precise is the speed parameter? I am programming in the NXC language (standard firmware) and wishing to know how many decimal points will be taken, if any, and whether the ...
4
votes
1answer
2k views

Mindstorms 2.0 can't download to NXT brick with error 142023

Using Mindstorms education 2.0 on a Windows 7 computer I can't seem to get the program to see the NXT via USB or bluetooth dongle. When connected by USB nothing appears in the NXT window with device ...
4
votes
1answer
108 views

Small lego train sets on narrow gauge track?

Will Lego sets such as "LEGO Christmas Train" 40034 or "Emerald-Express" 31015 run (manually) on narrow gauge lego track? These sets use a wheelbase that is only 4 studs wide and wheels that have a ...
4
votes
1answer
145 views

How can I find the analog output of a color sensor?

Could anyone provide me with an image of the voltage output of an NXT or EV3 colorsensor. I would like to have the analog output if it's possible, and not the digital output.
4
votes
1answer
180 views

Where can I get RCX 1.0 software?

We've got a LEGO RCX 1.0 without any Software. I've installed the USB IR Tower, what should I do now? I've downloaded the EV3 Software from the LEGO homepage and thought I could use this, but I don't ...
4
votes
1answer
544 views

Can I buy an add on educational kit for my retail EV3?

We ordered the retail version of Lego EV3, and my son loves it and wants to do more. Are there any add on kits we can buy to expand upon what we have, ie add on motors or special tech pieces, or an ...
4
votes
1answer
207 views

Why did LEGO create different canister for the Visorak?

I have the six original Visorak (Sets 8742, 8743, 8744, 8745, 8746 and 8747) with different canisters (or boxes). For example, my Suukorak (8747) has a white canister, and my friend's has a black ...
4
votes
2answers
152 views

Mindstorms start block is missing

the start block is missing on my mindstorms NXT 2.0 programming space. i cannot run any program without it. i have tried, restarting the programming window, placing a block and even just undoing to ...
4
votes
1answer
418 views

RobotC for RCX cannot find USB IR Tower

I have looked for similar question but found null. So here I am asking. I have Win7, a RobotC fo RCX and Mindstorms for RCX (both are old version, but available free). I borrowed an old LEGO kit ...
4
votes
1answer
216 views

How can I order an Ev3 gyro in Europe

I just bought the Ev3 kit, knowing that the gyro sensor is not included. I obviously want a gyro sensor, perhaps also the ultrasonic sensor. Is there any official channel to order them in Europe? All ...
4
votes
1answer
442 views

Can I change the Bluetooth identifier for an EV3 brick?

I'm coaching a number of FIRST Lego League teams and wish to set up our lab so that each computer could potentially be paired with each brick, but I want to uniquely identify the bricks (EV3-Team1, ...
4
votes
1answer
183 views

Does anyone know why Hagrid has fingers?

Hagrid (hp061 and hp009) both have fingers instead of just the traditional c-cup hands. Does anyone know why?
4
votes
1answer
316 views

How should I connect two LEGO cylinders with pistons to measure the movement caused by sea waves?

As part of a school project I need to make a model of a snake electricity generator. I would like to build this with LEGO elements, and for that, I need to measure the movements of the cylinders ...
4
votes
1answer
235 views

Old Lego movies

As I remember, it was about 1990 maybe some years earlier, there were movies, made by Lego, they were about 3 minutes long, maybe longer. It was of course not computer-generated videos but normal, ...
4
votes
1answer
258 views

Is there a place where you can buy single pieces of LEGO-compatible systems?

I've acquired a set of MegaBloks and was amazed at the slopes with studs on top. Unfortunately the set is $15 and there's only 6 pieces I need. So I wanted to ask, are there any sites like Bricklink ...
4
votes
1answer
111 views

Where can I find the black crusaders horse barding?

The question is all in the title. I'm talking about this: the second knight from the left entrance to the castle.
4
votes
1answer
2k views

How to control a RCX from a Mindstorms NXT

I have both an RCX and an NXT. I would like to control the RCX brick from the NXT (and possibly communicate back to to the NXT from the RCX). I would like to avoid purchasing the Mindsensors RCX to ...
4
votes
1answer
353 views

Is there virtual LEGO designing software? [duplicate]

Possible Duplicate: Do any programs exist that allow you to build own LEGO plans? Some years ago, there was a really good program to build models from LEGO. But today I can't find it. Do ...
4
votes
0answers
55 views

Can you keep blocks clutched together in big chunks? Will blocks loose their “clutch power” after years of that kind of keeping? [duplicate]

I keep my blocks of same type in big assembled chunks, for easy building and finding bricks, but I am worried, is it safe for them or will they tend to lose strength in some time (years maybe)?
4
votes
2answers
2k views

Bluetooth will not connect Error code: -142016

nxt 2.0 Error code: -142016 The Bluetooth does connect. I am not having these issues with any of my other Bluetooth devices running off of the same dongle. Where do I find the the meaning of any ...
3
votes
2answers
337 views

How versatile are the parts in a lego pirate ship set?

I am looking at buying one of the pirate ship sets, such as 6285-1: Black Seas Barracuda, however, I am concerned the parts in the set are too specialized, and could not be easily adapted to make ...
3
votes
6answers
2k views

lego ideas (with traditional bricks)

I would like to find a large catalog of Lego designs/ideas that can be built with "traditional" lego bricks (both normal and duplo). I have found many nice designs in the web, but most of them ...
3
votes
2answers
212 views

How make a 6x6 board rotate using LEGO technic parts?

Are there any common patterns for making a 6x6 (or bigger) LEGO board have a ability to rotate using technic with gears and such? Has to be without the help of the existing 2x2 lego part that rotates, ...
3
votes
3answers
432 views

Why are some seemingly simple sets, so expensive?

My son has fallen in love with the Lego City series. Alas, I let him watch a YouTube from the video game, and as we look to reward good behavior with reasonable sets, we are seeing very odd price ...
3
votes
2answers
194 views

Are there more studs or “antistuds”?

I was reflecting this morning about the recently introduced element Brick 1 x 1 with Stud on One Side and the fact that there is no real counterpart for it; that is, a 1x1 brick with a hollow cavity ...
3
votes
1answer
463 views

Is this antenna a LEGO piece?

I came across this piece while sorting: It appears to be similar to 2569, but it's clearly a different part. 2569 doesn't have the ridges and has a spherical tip rather than the cylindrical one on ...
3
votes
1answer
464 views

Why did they cancel Mars Mission?

Does anybody know why LEGO canceled the Mars Mission line? It was so good and I almost had everything! I don't wanna buy off eBay because that can get expensive. I liked it a lot!
3
votes
1answer
95 views

Large Lego Minifig Styles

I'm pretty sure the lego figure on the right is the daughter from a 1977 set Nurse and Child. But what about this style of jumbo minifig on the left with arms and legs that bend? When was that from? ...
3
votes
1answer
90 views

reference number and instruction of a spaceship

I have only an image of that spaceship, (and all briks of course) but I don't know its serial number which makes me hard to find instructions to rebuild it. The image of the spaceship is this one, ...

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