# All Questions

504 views

### NXT brick output ports not working properly

My NXT brick will not let motors run. When I download a program the motor will move forward and backward and then stop - sort of a wiggle. Another motor will not work at all. This happens for all ...
4k views

### How accurate is the ultrasound sensor when moving?

Can I use an ultrasound sensor while the Robot is moving, or will it give bad data?
239 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 ...
472 views

### Can I use two ultrasound sensors at a time?

Is there a way to use two ultrasound sensors on a Mindstorms NXT without them interfering with each other?
321 views

### Is it possible to display large text on an NXT using LabVIEW?

In RoboLab and using RobotC, it's possible to write LARGE text to the screen of the NXT. In RoboLab, this can be done by just typing [\big] at the beginning of a string constant which is wired into a ...
3k views

### Can I control 2 NXT bricks from a computer using bluetooth at the same time?

I am thinking about starting a project involving controlling the movement of a mindstorms robot depending on some input from a Kinect device; however the robot will require at least 6 motors. I have ...
1k views

### Adapting charger for NXT 9798 battery

I have an old style 9798 NXT rechargeable battery pack 7.2V 1400MnAh, but no charger. Can I adapt a spare non lego 9v 200mAh charger for this? Or is voltage too high? can anyone read the output ...
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 ...
2k views

### What is the difference between the NXT 1.0 controller and the NXT 2.0 controller?

I've tried to look this up but I can't find anything. As far as I can tell, the controller bricks (the white ones w/ buttons and a screen) are exactly the same and the only difference is NXT 2.0 comes ...
3k views

### How to make Mindstorms respond differently, depending on which sensor is triggered?

I am new to Mindstorms (but in my day job I am a programmer). I want to make my robot do one thing if the touch sensor on port 1 is pressed, and do something different if the touch sensor on port 2 ...
7k views

### How can I use more than three motors with one NXT brick?

I'm building Caterpillar Excavator with my NXT, and at the moment I'm trying to control 4 points of motion: 2 Caterpillar Tracks - These should be controlled independently to allow for cornering, ...
1k views

### Can we program Nxt2 in C++ under Visual studio 2010?

I'd like to know if it is possible to develop C++ software for NXT2 using Visual Studio 2010 as IDE. I know there are small online projects for NXT but I can't find nothing about NXT2.... Any ...
2k views

### How to install NXT / EV3 software on Windows 8.1 RT

I have a 64 GB Microsoft Surface running Windows 8.1 RT. I am trying to install the old NXT 2.0 software and new EV3 software, but when I try to open the .exe file it says: This app can't run on ...
1k views

### On Lego Mindstorms EV3, is there a way to change the input parameters of a My Block?

I am writing a program for which I did a My Block. I later realize that I need to add a new input parameter and I can't find a way of doing this without creating a new My Block. This seems it should ...
467 views

### My Blocks with return parameter

I have the retail EV3 kit and have created a function with in and out numeric parameters. While using the [in] params seem quite straight forward, it seems that I can only set the [out] param once. ...
268 views

### Export Lego Mindstorms Code

I was wondering if it was possible in any way to see the actual code that is generated by the Lego Mindstorms IDE. I know there isn't a direct 'export to code' option within the tool but I wondered ...
583 views

### Can I open my old NXT program files in the new EV3 software so I don't have to rewrite the entire program?

I would like to use or convert NXT-G 2.0 programs for use with the new EV3 software. Is there an easy way to convert them besides just building them from scratch in the EV3 environment?
308 views

### What are the memory requirements of EV3-G software blocks running on NXT bricks?

The NXT brick has about 130K memory available for user programs. With the newer firmware required for downloading EV3-G programs that memory has been reduced to 118K. How much memory is used by the ...
326 views

### Can EV3-G MyBlocks be recursive?

Imagine I create a MyBlock called "function1" from a line of blocks. Can I call that block from within itself? This is the program for the block "recursiveTest." Will this block function properly? ...
9k views

### Will Mindstorms EV3 be backwards compatible?

LEGO Group announced the next Mindstorms version, the EV3 which will be available in the Fall, 2013. Does anyone know if the new version, specifically the controller, will be backwards compatible ...
200 views

### Any way to make this setup “tighter”?

I'm trying to build a robotic arm, and I had the following built so that there was the minimum possible movement created by the gear wheel (that connects to the worm). However, there is still play, ...
606 views

### What does EV3 stand for?

I was wondering what the official reason behind the name of LEGO's latest MINDSTORMS robotics platform. What does "EV3" stand for?
210 views

### Can I build UCS Death Star by buying bricks separately?

I'd like to get the UCS Death Star, but it's too expensive :( I got the build manual, and I see what bricks I need. I am thinking of buying them separately via Bricklink. Has anyone tried doing ...
780 views

### Minifigures creator?

Does a website to create custom minifigs exist? For exemple, you choose your head (between all official LEGO releases), torso, legs, and hair, and then you can purchase it for the same price as you ...
100 views

### How do they keep the outdoor models so clean at the various Legoland parks?

I've visited Legoland in California a few times and was always impressed with the lack of accumulated grime or bird "strikes" on the outdoor displays. How do the park employees accomplish this feat? ...
2k views

### Interfacing Mindstorms NXT 2.0 with webcam

I very recently started playing with Mindstorms and have used the sensors that was provided along with the NXT 2.0 set. I'm planning to work on something on the lines of image processing and I need a ...
2k views

### Building a full-size lamp using Lego bricks

On an episode of the TV show 'Home by Novogratz' they featured a real, working lamp that was made out of Lego bricks. More specifically, the creator surrounded an existing lamp with the bricks, ...
559 views

### What happened to Cuusoo set #6

Lego Cuusoo just announced set #7 Ghostbusters 30th anniversary. Cuusoo set #5 is the Curiousity Rover. Why is there no set #6? What happened to it or did Lego announce it and then change their ...
176 views

### Is there a way to buy LEGO houses without minifigs?

Why are there so many LEGO Friends minifigs, but barely any houses? I have made about 10 families and I still only have one house.
68 views

### What's the most effective way to clean dusty builds? [duplicate]

I have a large airplane build that I haven't touched in quite a while, and it has built up quite a large amount of dust. I've tried using a wet washcloth to wipe off the dust, but when cleaning that ...
2k views

### How can I invert the direction of blocks in a structure?

I have a structure with some blocks facing in the 'normal' direction: nn nn nn nn | || || || | -- -- -- -- I would like to somehow connect a layer above this that has the blocks ...
4k views

### Can I use RCX sensors and motors with the NXT brick?

I have a bunch of motors and sensors from the original Mindstorms set. It seems a shame I can't use these with the more recent NXT set. Are there any unofficial modifications that allow you to convert ...
243 views

### What is the difference between these hole shapes?

I purchased an assorted bag of LEGO Technic pieces. There are pieces with axle holes, but what puzzles me is that the holes are different from what I am familiar with. There's a piece with an ...
760 views

### What's a good base collection of tiles?

I recently picked up a copy of the LEGO ideas book, and been inspired. As a novice builder, I've noticed that almost every model makes use of tiles to provide a finished look, which seems like a great ...
126 views

### Where to order custom mini-figs in Europe

General question is are there any custom Lego minifig online stores in Europe like there are many in the US ? In detail: My friends friend is getting married and she would like to surprise them with ...
228 views

### How can I preserve opened Lego packages?

For some reason I keep my old Lego boxes (since the 1980s), and my son's old Lego packages. Because they are quite large, they take up a lot of space in my house, even if they are put one into ...
7k views

### Where or how do I get replacement stickers for my Lego set?

I have a BMW Williamns F1 Lego set 8461 that I built when I got it several years ago. I unfortuneately let it sit out on my shelf for a long time. The stickers have peeled and cracked and some have ...
87 views

### Where can I purchase replacement stickers for a current set? [duplicate]

My stickers for set 60035 are damaged and need to be replaced. Where can I obtain replacements?
244 views

### Pick A Brick delivery times

I am about to order some bricks using the online Pick A Brick service. Unfortunately, its delivery time information is confusing. In the right column of the checkout page, it says: Your item will ...
4k views

### How much do bricks cost at the LEGO Store?

I have never been to a LEGO Store, and I am hoping to go to one soon. I was wondering if anyone knew how much bricks cost at the LEGO Store? I want to buy some minifigs and some bricks. Do they sell ...
179 views

### What exactly is this Lego train motor?

I bought this in the early 90s as a spare, since the type of Lego train was being phased out. Presumably the old 12V system. The original train was given away but I still have this. I want to sell ...
385 views

### Duplo Activity table to Lego System Table

We purchased a table with Duplo baseplates on top (activity table) for my son when he was 1 year old. He's now turning six and we would like to convert the Duplo top to the regular LEGO System top. is ...
300 views

### Please tell me what tunnel-hull boat set this is?

I cannot figure out what this set would be...I like it and want to find instructions...but tried different wording and looking at images without luck.
2k views

### Getting the IR Tower working with RCX and RobotC [duplicate]

Possible Duplicate: Lego Mindstorms RCX RIS 2.0 IR tower Windows 7 / Windows XP driver Trying to get RobotC to work with my old RCX 2.0. I'm running windows 7 64 bit. I've connected the IR ...
646 views

### Battery for Trains

For those who have tried, which one is a better option: Rechargeable Battery Box and Transformer/Charger 10VDC ($50 +$25) or AAA Battery Box and a lot of AAA batteries ($13 + ?) Obviously$75 is ...
253 views

### Will Lego Caboose (10014) work with Lego Cargo Train (7939)?

Will at the older Lego Caboose (10014) work with the Lego Cargo Train (7939)? I wonder if it will fit the newer track and if the magnet couplers will still work?
4k views

### Has anyone automated the LEGO hand sorting process beyond “pawing & piling”?

I need to rephrase my question. Has anyone built or used a large pigeon hole/ chute/ bin collection system to sort LEGO elements? The sorting system doesn't need to be made of LEGO bricks. I just want ...
489 views

### How to unplug black friction pin connectors

Black friction pin without slots connectors are common in older Technic sets. Note that these were quickly replaced by the current version with slots that is much easier to remove. vs Especially ...