2
votes
2answers
55 views

Faulty NXT Motor

I have a motor that prevents the program from running. It simply allows a few slow movements forward with stops in between. It seems very stiff to rotate manually. Any way I can repair this motor?
2
votes
0answers
27 views

Train track switching using servo motor [duplicate]

My project requires using a servo motor for switching track. It needs to be automate switching points. Is this possible? What is the cheapest / easiest way of achieving this?
2
votes
2answers
177 views

Return a robot to its start position?

I have a LEGO NXT robot, and after some movements I would like it to return back where it started. After some research, it looks like my best option is to revert the motors. To decode their movements ...
2
votes
0answers
79 views

How do I get the Mindstorm EV3 software to recognize an NXT brick via Bluetooth?

I'm trying to program my NXT brick via the EV3 software over a Bluetooth connection. I can connect it via USB (although that too failed initially but has since resolved; not sure why) but I'd really ...
1
vote
1answer
150 views

Need help to identify minifigure

Can someone help me to identify minifigure linked below: I´ve been searching now about three hours without luck :)
5
votes
2answers
118 views

Opaque bricks with no center post?

What is the purpose of 1x2 red bricks without a post inside the brick? I know they often leave out the middle post on transparent bricks to make them look more window-like, but what about in opaque ...
0
votes
1answer
37 views

Why I get this “message unable to compile some documents for deployment ev3”?

I have a LEGO Mindstorms EV3 program that I was working on for a long time but recently and suddenly when I try to download the program the software displays the following message: "unable to ...
4
votes
1answer
195 views

Communication between two Ev-3 bricks

How the communication between two Ev-3 bricks is done over Bluetooth? What is the nature of data that can be communicated?
1
vote
1answer
60 views

Teleoperated arm trouble

I have built a robotic arm with the lego Mindstorms ev3. My goal is to control its motion via teleoperation, that is , to have a gyro sensor strapped onto my arm and have the robot mimick the up and ...
3
votes
2answers
141 views

Substitutions for vintage hinges

I've recently gotten back into LEGO and I'm trying to restore old space sets (late 80's era) by buying parts on Bricklink. I've noticed that some of the hinge pieces are extremely expensive (e.g. ...
1
vote
2answers
290 views

Creating a native EV3B block

I'm trying to create a native block for a hardware sensor. I've got it working pretty well, but can't get it to show up in the "port view" as anything but a sound sensor. I really need the live view ...
8
votes
3answers
8k views

What is the average price per piece?

Some LEGO pieces are probably more expensive than others, but what is the average price per piece of LEGO pieces, when sold as part of a kit? Is there any place containing statistics or graphs about ...
2
votes
1answer
48 views

How can I use the EV3 educational firmware instead of the retail version?

I have an EV3 brick from the retail kit, which is currently running the retail firmware. I would like to replace the EV3's firmware with the educational version. How can I do this?
2
votes
2answers
67 views

Resources to learn useful common Mindstorms mechanical construction patterns

I'm currently working on building a small scale CNC-like (X-Z, no Y axis) machine to cut glass mosaic tiles. I decided to give it a go using my EV3 set and I'm having some trouble with the Z-axis ...
3
votes
1answer
243 views

Where can I download the software for old RCX-era Mindstorms sets?

These days I've been coming across a lot of people who've purchased used MINDSTORMS sets from the RCX era, only to find they didn't come with a CD. And in order to use the set, assuming that using an ...
2
votes
1answer
96 views

Connecting a webcam to NXT and streaming a video

is it possible to connect any webcam or modify it in such a way that the NXT controller will be able to stream a video to another computer? Iv'e seen there are special sensors for it, but I can't ...
2
votes
3answers
172 views

What are some 3rd party mini-figure gun makers that distribute in Canada?

I'd like to buy some flint-lock era mini-figure guns for my collection, something like these guns. What I don't want is to pay the outrageous customs fees to get them to Canada. Does anyone know of ...
2
votes
2answers
260 views

How do can I tell if minifigures are custom-made or LEGO Originals?

I see that on Amazon you can find a lot of minifigures but I can't tell if they are cheap knock-offs or not.
0
votes
1answer
73 views

EV3 bluetooth controller for mac

Is there a suitable EV3 controller for mac? It should be a compatible alternative from the official EV3 controller in the iOS app store or google play.
5
votes
1answer
58 views

Convert 3rd party NXT programming language code to NXT-G program?

Is there a way to convert code from one or more 3rd party programming languages used for programming the NXT into a program that can be loaded up in NXT-G? If not, do any text-based languages provide ...
25
votes
14answers
5k views

Do LEGO bricks float?

Is it possible to build a boat out of LEGO bricks? I appreciate you couldn't make it watertight but would a LEGO boat float by itself due to the buoyancy of the bricks themselves? Pictures of any ...
2
votes
2answers
115 views

Vision Command and Exploration Mars software for Mindstorms RIS 2.0

I recently bought a set 3804 LEGO Mindstorms RIS (Robotics Invention System) v2.0 very well maintained but did not have the installation CD of the RCX program and IR tower. With some research on the ...
3
votes
1answer
104 views

Why are some of the supports on bottom of a lego piece hollow, and other are solid?

I've added an image of me holding two 1x3 bricks, one has solid supports (not sure the technical name...) and the other has hollow supports. Does anyone know the reason why they are different? Other ...
3
votes
2answers
84 views

Lego Motor for cycling a tool

I am curios to know if I can utilise the Lego Power range to rotate a transducer to a set point and return to its original position and if so is it able to cycle the movements repetitively? Ideally I ...
2
votes
1answer
151 views

EV3 Rapt3r's head cable interfering with slithering

My Rapt3r is working great, except that the cable that goes from the head to the "Intelligent Brick" physically interferes with the slithering on the side on which it is plugged (port 4). Physically ...
1
vote
1answer
116 views

What part can I use to get the connection

This is what I have.. Would like to connect the long "thing" to the square base.. not sure which part will give me a angled elevation In case you are wondering what I am trying to do.. this is what ...
7
votes
1answer
143 views

What plastic do Quatro blocks use?

I recently picked up a heap of Quatro blocks, and noticed that the plastic seems to be much softer than the normal ABS-based Lego and Duplo blocks. Does anyone know what kind of plastic was used in ...
1
vote
1answer
80 views

Is it possible to connect EV3 and NXT bricks like master/slave configuration via bluetooth?

Can I make a Bluetooth connection between LEGO EV3 bricks and LEGO NXT bricks? and If it is possible how to handle the software to make a chain between them?
1
vote
1answer
110 views

RGB sensor HOWTO use?

I've got an RGB sensor (this one with the three LED thingies) and wonder how to access it using NXC. I know I can SetSensorColorFull(IN_1); and then access it using ReadSensorColorEx or, for ...
10
votes
2answers
9k views

Where can I find a list of all LEGO sets ever released

Can I get a full list of every set LEGO has ever come out with?
4
votes
3answers
3k views

How to use Power Functions with Mindstorms EV3?

Having learned that Mindstorms EV3 doesn't work directly with Power Functions, Q: Can you use Power Functions motors with the EV3 programmable brick? A: No, the connector does not match. I ...
3
votes
1answer
117 views

Can anyone identify this spinner with 1..5 and a skull?

My son has just inherited a large box of Lego, we're hoping someone can help identify what set this might be from.
4
votes
2answers
288 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 ...
1
vote
1answer
76 views

Programming RCX in 10.9 environment

My school has 15 RCX robot kits that this year has just been sitting because all the old computers with OS X 10.4 are now gone and we are using OS X 10.9. I would like to run the original RoboLab ...
20
votes
16answers
22k views

LEGO cleaning techniques and tools

Previously I've used toothbrushes but maybe these would eventually scratch the surface? What have you used? And was it easy? As well as cleaning, what about drying and buffing? Anyone tried polishing ...
1
vote
1answer
93 views

Direct command lego ev3 [closed]

Is there any documentation about direct command bluetooth of EV3? Thanks, regards!
1
vote
1answer
219 views

Code for PID for EV3-g

I want to use PID for my Ev3. I used PID for NXT-G before, but I have never used EV3-G before and don't know how to get PID. Could someone please post a screen shot of the code or upload the file?
-1
votes
1answer
83 views

LEGO mindstorm - which product to use to make projects mentioned below

I have to buy Lego Mindstorm kit for some projects. I really have never used Lego before, my friend asked me to consult him about projects (I use micro controllers and make robots from material I ...
1
vote
0answers
86 views

What method do you use to figure out what set you have? [duplicate]

This question really got me thinking about this: I bought a second hand pack of pieces and it looks like it may be a specific set How do you even go about figuring that out? How would you even start? ...
12
votes
6answers
2k views

Repairing Lego minifigure torso cracks/damage

I have a ton of Lego minifigures that I really put through their paces throughout my childhood (fighting pirates, exploring space... basic stuff really). A number of them are damaged on the torso. ...
0
votes
1answer
175 views

Guide me on how to use my Mindstorm RCX kit on OS X Mavericks

Any suggestions on how I can use my old RCX set on Mavericks? I have set up Xcode command line tools, and I am getting compiler errors while trying to download nqc through Macports. Even downloading ...
3
votes
1answer
106 views

How can I use 1 motor for grabbing/lifting and another for moving?

I am really stuck on how to use the three motors for better functions. Is there anyway in which I can use 1 motor for efficient/quick movement while turning left and right? Another thing is whether I ...
0
votes
1answer
54 views

Decals for Lego Pharaoh's Quest Flying Mummy [duplicate]

Do all lego sets have decals? I am specifically looking for decals for Lego Pharaoh's Quest Flying Mummy.
3
votes
1answer
201 views

I bought a second hand pack of pieces and it looks like it may be a specific set

Hoping for help to identify a set of lego pieces. It definitely has a car wheel base, and the base boards are green.close
4
votes
1answer
97 views

How much does the NXT brick weigh?

I am working on a project that involves LEGO Mindstorms bricks but for some tasks I want to know the weight of the NXT brick, so I would be pleased if anyone can help me.
1
vote
2answers
92 views

I need information on LEGO part #3001 in Milky White with Sparkles

Have a 3001 part i have come across with a color i've never seen before. It seems to be a milky white but with glitter in it. New style logo with pip on short side. Any ideas to where it came from?
16
votes
4answers
816 views

Which hand is this minifigure extending normally?

I remember more than one argument with a friend over which way LEGO minifigures' hands should be oriented to be correct (with the thumb pointed upward/inward, like a human hand's neutral position). ...
10
votes
4answers
919 views

How should I go about selling $3k worth of unsorted LEGO sets?

Here is my problem. Over the years my son had me buy a large number of Star Wars sets (including 10179, 10188, 6211, 7676, 7675) and he built them. Then he traded (or lost) most of the mini-figs ...
10
votes
2answers
1k views

Are the LEGO Friends Mini-dolls compatible with Minifigures?

I've seen the new LEGO Friends sets, and wanted to know if the Mini-dolls are compatible in any way with minifigs? I'd quite like to get some sets for the new colours however I want to ensure the ...
1
vote
2answers
143 views

What is the easiest way to sell Lego sets for a good price?

I have a HUGE collection of LEGO sets that I want to sell. Ebay is too cheap and Craigslist takes too long. Is there an easier and faster way to get some good money?

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