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126 questions with no upvoted or accepted answers
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15
votes
3answers
2k views

Are these bricks old Lego/Duplo clones?

Can anyone identify these bricks, which I suspect are Lego clones. They may be more than 30 years old. I bought them on ebay as Betta Bilda from Lego/Duplo dealer. Some BB was included, but these ...
12
votes
1answer
500 views

How much tension can I expect to get out of a lego chain before it starts to give away?

Assuming I am using the technic chain links to make a chain, how much force can I expect to be able to get out of the chain before it breaks? Suppose I am using a 16t gear to directly drive a 24t ...
9
votes
0answers
92 views

Is it possible to use EV3 MicroPython with Windows 7?

I have been trying to get python on my EV3 brick using an EV3 MicroPython SD card image as described on the Lego website. The EV3 brick seem fine with its new OS. Instead my problems are at the ...
9
votes
0answers
376 views

Can anyone identify the brand of this non-LEGO brick with grooved sides and a lion logo?

Hi folks I was hoping someone out there may recognise the brand of this block I found in the garden. I have been searching but the closest I can find are Locblocks - however this appears to have a ...
9
votes
0answers
324 views

Step 160 on Carousel 10257, white hinges not connecting?

I'm struggling with step 160 where I use white "hinge" connectors to connect the carousel platform sections. It seems to create too much pressure and the platform breaks apart. Grateful for any tips.
8
votes
1answer
305 views

Is it possible to remove a parted out set from BrickLink inventory?

I have an inventory in BrickLink, in which I accidentally parted out (with the consolidation option) two sets instead of one. Is there a way to remove the pieces of the second set somehow without ...
7
votes
0answers
139 views

Ordering of Pages in Printed LEGO Catalogues

While looking at some of the scanned LEGO catalogues on BrickSet, I have noticed that the UK catalogues (at least the ones I looked into) seem to be ordered "backwards" compared to what I'm used to ...
7
votes
1answer
443 views

PC To NXT Brick via Bluetooth

We have a fully-working java program which can connect to another computer and can send messages from this(both sides run java and we used SPP Server and Client), however when trying to connect to the ...
6
votes
0answers
261 views

Why does LEGO avoid 2x4 plates on these occasions?

As this year's LEGO city advent calendar gradually gets opened, I have repeatedly been astonished by the choice of parts: At least twice so far (in the oven and in the catapult target), two 2x2 plates ...
6
votes
1answer
264 views

DUPLO Train Action Bricks

I have the weirdest thing with my son's set. Currently one of the yellow action tiles honks the horn but the other yellow brick does not. No matter the lighting conditions, the position, orientation,...
6
votes
0answers
338 views

What material is the LEGO laptop made of?

What material is the LEGO laptop piece made of? It does not feel like their normal rubber and it certainty doesn't feel like ABS.
6
votes
0answers
614 views

Building instructions: Robot Spider Pen by Ricardo Oliveira

Some time ago I found the following youtube video by Ricardo Oliveira of a small NXT plotter that crawls over a whiteboard. It has two strings that can be shortened through coils and with this, it ...
6
votes
0answers
209 views

Where does the EV3 software store its crash reports?

I cannot find where the crash reports generated by my EV3 software are stored. I have looked where it tells me to, but I can't find any.
5
votes
0answers
65 views

Recent change in Pearl Gold colour?

I just received a Bricklink delivery with pearl gold pieces (see right-hand side in the image). This colour is less shiny and has less of the pearl effect that I used to expect so far (left-hand side, ...
5
votes
0answers
123 views

Lego Boost distance sensor, what range does it have?

While programming our Lego Boost set (using the Lego Boost App on iPad) I noticed that the distance sensor seemed to give inaccurate triggers. To try to confirm this, I connected the move hub to my ...
5
votes
0answers
343 views

MouldKing set 13132 - Original design, alternate build or cloned MOC?

It seems that Chinese clone brand Mould King will be producing a new set that looks a bit like LEGO's Disney Castle set (71040). It has two times as many parts, however, and unlike LEGO's Disney ...
5
votes
2answers
199 views

How to mirror an EV3 motor?

I want to get one EV3 large motor to copy the other. So if I move one half a rotation the other copies.
5
votes
0answers
102 views

String thickness comparison

I am currently working on a project which uses a massive array of strings linking little levers. I am currently using the "thin" type string as it is the only type I have, but I am running into ...
4
votes
0answers
82 views

Lego Mindstorms NXT 2.0 Not turning on

I have a Lego Mindstorms NXT 2.0, which worked well for a couple of years. However, after the last few weeks, it seems to not boot up. I took it apart, and noticed it seems to have a different ...
4
votes
0answers
101 views

Europe based printing services for low quantity high quality custom printed tiles

I've found many websites providing a service for custom printing of LEGO tiles : United Bricks Brick Engraver BrickSanity Fab-Bricks Citizen Brick EclipseGrafX Minifig Madness BrickTactical ... I ...
4
votes
0answers
98 views

Looking for instructions for Air Canada Mega Bloks polybag 99911/99912

When I was a child I received a Mega Bloks airplane set on an Air Canada flight. I still have most of the pieces but cannot find the instructions. The closest I can find is this eBay image of 99913 ...
4
votes
0answers
243 views

Building techniques for designing a LEGO City Street scene?

As the question suggests... I'm trying to build a city street in "midiscale" similar to that of Hong Kong, but I have no idea on where to even begin with something like this. This project is being ...
4
votes
0answers
232 views

How to build an arch that is angled out of Lego?

I am currently working on a MOC for the USS Orville and I am trying to figure out the engines. I have gone through a couple of iterations on my current version, but it always buckles under its own ...
4
votes
0answers
441 views

Which Lego set has had the most Easter Eggs?

With the release of the new Harry Potter Hogwarts Castle (set: 71043) has 6,020 pieces. I believe this a subtle reference (Easter egg) to the Lego set 6020, one of the first sets to ever have a ...
4
votes
0answers
465 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 ...
4
votes
0answers
639 views

Daisy chaining EV3 with RobotC

I'm trying to run EV3 programs with RobotC and trying run on EV3 Daisy Chaining. I have three independent EV3 bricks labelled A,B,C. I want, according to the color reading by the color sensor on ...
4
votes
0answers
494 views

LEGO turing machine using Rascal

I followed the instructions on LEGO Turing Machine and succeeded to build it. Next I've tried and failed to program it using NXT Mindstorm GUI. The site mentions a Rascal framework, but it doesn't ...
4
votes
1answer
346 views

How to power up MOC-0308, based on Technic 8297 Off-Roader?

I have built the following MOC, with details here and here. It is pretty complete, although I would have tried some servo motor for steering. But after I've finished it, I've got into trouble: ...
3
votes
0answers
29 views

Are LEGO Quatro compatible with larger bricks? Soft Bricks or other?

There is a nice discussion here on LEGO+Duplo+Quatro compatibility. I posted what I found here where a LEGO storage block is the right dimension to be double a Quatro (4x Duplo, 8x normal). However, ...
3
votes
0answers
75 views

What was the first Lego tie-in film or television production?

Nowadays, it's pretty common for TV shows and films to be released by film studios in agreement with The LEGO Group and tying in to current LEGO set themes - famous examples include the recent films (...
3
votes
1answer
80 views

Angry birds arms

Is it possible to attach the Angry Birds arms to a regular minifigure, or is the attachment pin different?
3
votes
0answers
41 views

Connectivity graph for a digital model

I'm looking for a way to take a digital representation of a model (e.g. an LDD or LDraw file) and extract from it a representation of the model that describes which pieces are actually connected to ...
3
votes
0answers
39 views

BricxCC not seeing USB Tower in Windows 10

I have a similar problem to BricxCC not seeing Serial Tower in Windows 10 except I have a USB tower (not a serial one). I have spent hours on this and didn't manage to solve it. Tried installing it ...
3
votes
0answers
148 views

Unknown Minifig Accessory (chrome silver/pearl gold)

I got a bunch of these in a bulk bin and cannot figure out what they are. It is possible they are not lego itself as I cannot find a lego logo on it anywhere. Anyone know what they are?
3
votes
0answers
42 views

Adding custom / recorded sounds for power-up

The Powered Up application offers many more sounds than the BOOST app, but the later allows for recording of extra sounds... How could someone add / record custom sounds for powered-up App?
3
votes
1answer
84 views

Chromebook Lego Mindstorms EV3 trouble

I want to make a crane in LEGO Mindstorms EV3 and I've already downloaded the software but as you can see below some coding pieces here are not in the Chromebook version. Should I download the ...
3
votes
0answers
144 views

Can you tell me where this Mega Bloks part is from?

I found this part and was wondering what set it's from, thanks!
3
votes
0answers
277 views

How can you get the pipes on Steamboat Willie to work reliably?

We recently began building 21317 Steamboat Willie. We've got it mostly built, but the pipes keep getting stuck. The rear one works, but the front one keeps getting stuck up and won't go down. We've ...
3
votes
0answers
229 views

EV3 Brick and Commander app Bluetooth disconnecting

On iOS on an iPad, we're having an issue with the EV3 Brick and Commander app Bluetooth connection constantly disconnecting. The brick just stops responding, so we turn the brick off to disconnect and ...
3
votes
0answers
68 views

Are there any Open-Source bricks projects for robotics?

I mean some bricks like Lego/Meccano with a community like Instructables site, those share their models and robots with others. Also the 3D models of bricks(in solidworks format for example) are free ...
3
votes
0answers
216 views

Any cheap Technic sets with a good variety of parts?

I want to start building a module like GBC mini loop 001, but when I check the part list some are very hard to get. How should I get started? BTW, I got a very big set, Bucket Wheel Excavator 420555,...
3
votes
0answers
356 views

Creating custom blocks using EV3 block developer kit

I am trying to develop a custom block using ev3 block development kit but I get nowhere. I created the XML files according to the documentation and the VIX file but it does not compile, I cannot ...
3
votes
0answers
754 views

Ev3 spik3r mission 2 doesn't move

So I was building Spik3r and I thought I got mission 2 completed. Wheels are turning, legs are moving but the robot just does not move. It looks like the small wheels should be moving the robot but ...
3
votes
0answers
697 views

Can I use EV3 with a TETRIX motor?

What program can I use to control a TETRIX motor through the LEGO EV3? I've heard that RobotC currently cannot be used for this. Has NI released a Labview version which I can use to control TETRIX ...
3
votes
0answers
529 views

RCX 1.0 downloaded firmware successfully with RIS 2.0 but does not run any program

I have installed correctly the RIS 2.0 in an old laptop running Windows XP and I successfully downloaded the firmware through the RIS 2.0 to the RCX 1.0, following the standard setup instructions. ...
3
votes
1answer
196 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 ...
2
votes
1answer
86 views

Simple way to build large circles?

I was wondering if there is a simple way to create a large circle or circle-like plates. I want to build a MOC of the Hero Factory assembly tower (In LDD first) but most of the pieces that form ...
2
votes
0answers
51 views

Why won't my Lego Mindstorms NXT stop beeping/clicking and work properly?

I was trying to update the firmware on my NXT but suddenly the screen went blank and it started beeping. I unplugged and re-plugged my USB and a notification came up saying that the device ...
2
votes
0answers
51 views

How to get Lego Mindstorms EV3 expansion set (45560) programmes in Scratch

I bought recently Mindstorms EV3 expansion set (45560) and found out that the available programs are written in old LabView-style programming language: https://le-www-live-s.legocdn.com/sc/media/files/...
2
votes
0answers
69 views

Lego Mindstorms Software: “Error code: 4”

After updating my EV3 Brick's firmware from V1.09E to V1.10E and reinstalling the Teacher Edition of the Lego Mindstorms EV3 software (even though I'm not a teacher), I decided to recover my Brick's ...

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