5
votes
1answer
456 views

Buying another kit instead of 8293-1: Motor Set?

I want to get some motors but don't know if it is a better idea to buy 8293-1: Motor Set or try obtain motors from some other sets. Is there any kit challenging 8293?
5
votes
1answer
408 views

What can cause programmed NXT 2.0 motors to misfunction when small resistance is applied?

I have robot built per the Alligator tutorial included with Mindstorms NXT 2.0. Everything works correctly if I hold it off the ground and make sure there is no load on the two leg motors. However, if ...
5
votes
3answers
476 views

Making or buying a really long Power Functions cable

I'm working on a train layout and have built 2 automatic switches for the switch track. Each switch track is powered by M-Motor. I'd like to connect the 2 motors to a single IR receiver and battery ...
5
votes
1answer
12k views

Lego Mindstorms RCX RIS 2.0 IR tower Windows 7 / Windows XP driver

So I've recently dug up my old Lego Mindstorms RIS 2.0 (RCX) and have spent the past few days trying to install it into my Windows 7 laptop. It worked fine, except it could not find the correct ...
5
votes
1answer
262 views

Access hatch in a wall?

Working on a 10 stud by 10 stud Square bell tower for my annual project. Need to create a access panel/door. Any tricks that can be done so it's hidden or at least not easily noticed? I need to hide ...
5
votes
1answer
434 views

Why does my NXT colour sensor not recognise colour on my iPhone?

If I point the colour sensor to my iPhone it does not recognise it, but if I point it to a piece of paper, it does. Does anyone know if there is a solution for this? I found some documentation ...
5
votes
1answer
1k views

Does the Power Functions IR Remote Control 8885 make a good remote for a car?

I have the Power Functions IR Speed Remote Control 8879 and it's great for, well, the train it came with and maybe other applications where you don't need precise control. 8885 looks like it would ...
5
votes
2answers
618 views

How do I create manuals in the same style as Lego instruction manuals? [duplicate]

Possible Duplicate: Do any programs exist that allow you to build your own LEGO manuals? I want to create my own manuals, but I want them to look and feel like actual Lego instruction ...
5
votes
1answer
140 views

What lego set is this? Possibly a pirate ship?

my wife picked up this lego set at a garage sale. The owner claimed it was a ship, perhaps a pirate ship, and that the set was complete. It does have something resembling a bow, and several tall ...
5
votes
1answer
54 views

Pass sensor or motor port number as a parameter

I want to create a block for one light sensor or one motor separately. Is it possible to give the number of the port as a parameter to a sensor or motor block via data wire? In NXT-G it was possible.
5
votes
1answer
161 views

How to restore minifig faces

Vintage minifig heads (from the 80s, 90s with the classic smiley) often lose their eyes and mouths after years of play. The paint wears off. How do you best restore the heads?
5
votes
2answers
220 views

Personal part collection on the web (Bricklink or alternative)

I started using Brinklink a few months ago and although I really like it the interface is terrible. I am looking for a specific feature but don't know if it's unsupported or just I cannot find it. ...
5
votes
2answers
2k views

Is there any way to buy specific duplo blocks from Lego (pick-a-brick style and/or in bulk)?

I'm brand new to this site, so please bear with me... I've used the search function with no luck, trying to find similar questions that have already been asked, and I've skimmed all the ...
5
votes
1answer
255 views

Will using a bright LED to light my MOC harm my LEGO?

I'm building a LEGO model and planning on lighting it with a bank of 5 battery operated LEDs. I know sunlight negatively affects several LEGO colors. Will a bright LED harm the elements in my MOC the ...
5
votes
1answer
181 views

Why 2M Cross Axle has Groove?

I was sorting axles noticed only 2M has grooves. Why 2M Cross Axle has grooves? Is it for alignment?
5
votes
1answer
293 views

NXT motors not moving?

I've been looking around the net for a solution to this problem, to no avail. After taking my NXT v1 out of storage, I tried using a motor, but it sortof just, moves back and forth once, then ...
5
votes
1answer
166 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 ...
5
votes
1answer
246 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?
5
votes
1answer
422 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 ...
5
votes
2answers
401 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 ...
5
votes
1answer
327 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 ...
5
votes
1answer
166 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 ...
5
votes
1answer
737 views

What different bricks exist with studs on the sides? [closed]

(Partially inspired by this question.) I have been wondering recently just how many different LEGO bricks there are with studs on the side. Which LEGO bricks have studs specifically on the sides? ...
5
votes
1answer
108 views

lego pieces stuck together! a stick 6m w/flange and a nose cone small 1x1 triangle

My lego pieces, a stick 6m w/flange and a nose cone small 1x1 triangle, are stuck together. I've been trying to seperate them but they just won't. Any advice?
5
votes
2answers
796 views

Can I change the firmware on a Retail EV3 Intelligent brick to the Educational version?

The LEGO Mindstorms EV3 comes in both educational and retail versions. The educational version differs in bricks, sensors, a rechargable battery and datalogging capability. I would like to know can I ...
5
votes
2answers
309 views

Where I can find the pieces needed in a set?

I own this set, LEGO® Kingdoms King's Castle 7946. One day I let my wife's best friend's kids play with it. (Not the best idea in the world but they had a blast!) Needless to say, the castle ...
5
votes
2answers
246 views

Does anyone make a self-driving car?

Mapping and localization are the hottest trends in robotics today. And what's more exciting is they can be both implemented with a low-cost robotics kit like LEGO Mindstorms! I tried to make a ...
5
votes
1answer
286 views

Is it safe to try different firmwares on EV3?

I have prepared a SD card to run Lejos on EV3, as said on Lejos Sourceforge page and I'm about to test it. What worries me - will I still be able to go back to original Firmware if something goes ...
5
votes
1answer
186 views

How to use NXT device as a keyboard key for computer

Is there any way for me to set up my Mindstorms robot so that when I push one of the touch sensors it sends a signal to the computer to press a key?
5
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 ...
5
votes
1answer
415 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 ...
5
votes
1answer
477 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
5
votes
1answer
660 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 ...
5
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 ...
5
votes
1answer
56 views

Is it safe to remove PC (polycarbonate) arms from minfigures?

I would like to replace the clear PC arms on the Chima ice figures with opaque ABS. Would I still be able to use the clear PC arms with other figures after I have removed them? I know that removing ...
5
votes
1answer
230 views

Does LEGO generally restrict the sale of Lego sets in a country?

I live in Israel where Lego are available but for insane prices. Generally 5X the price of a Lego set online. I have called Lego asking to have a Lego set shipped to me, and they have told me that ...
5
votes
1answer
239 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 ...
5
votes
1answer
483 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 ...
5
votes
1answer
683 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 ...
5
votes
2answers
3k views

Lego Mindstorm NXT cannot connect via bluetooth

I have an NXT mindstorm brick, running RobotC firmware. I am trying to connect to it, via bluetooth. At first, the problem was that I had the motorola drivers instead of ones from microsoft. Even ...
5
votes
1answer
1k views

Which BIONICLE combiner sets do official instructions exist for creating?

There is a diversity of BIONICLE combiner sets (sets made by combining multiple individual sets together) for various groups including Toa, Matoran, Bohrok, Rahkshi, Dark Hunters, and a number of Rahi ...
5
votes
1answer
280 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 ...
5
votes
1answer
239 views

Are these ATC bricks from the 1970's LEGO?

I have some Lego compatible basic bricks from early 1970s or late 1960s. Bought in Finland or maybe Germany or Sweden. Can anyone tell me more about them? As you can see, the interlocking mechanism ...
5
votes
2answers
720 views

How to program two NXT motors to run at the same time?

I'm working on a project with multiple axis of movement… trying to get two motors to run at the same time in order to achieve a mix of two!
5
votes
1answer
337 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 ...
5
votes
1answer
345 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 ...
5
votes
1answer
124 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.
5
votes
1answer
463 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 ...
5
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 ...
5
votes
1answer
617 views

How to make custom LEGO signs, newspapers, etc. [closed]

I have several ideas, but I am finding it hard to get started. What I am interested in is making my own decals for signs, newspapers, artwork for the walls and others. So far I haven't had any luck. ...

15 30 50 per page