All Questions
164
questions with no upvoted or accepted answers
16
votes
1
answer
1k
views
How much tension can I expect to get out of a LEGO chains 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 16-tooth gear to directly drive a 24-...
- 1,146
10
votes
0
answers
254
views
How To Ensure Only One Brick is Fed Into a Lego Sorting Machine at a Time?
In this video, they create a machine that can take a bunch of legos put on to a conveyor belt and, using a camera, sort them into a number of categories. I am building a (smaller) version of this, and ...
- 101
9
votes
1
answer
287
views
Plate perpendicular to bottom of 2x2 round: is this connection legal?
I've played enough with 2x2 round plates and 1-stud-wide plates to know that it's possible to attach a plate underneath a 2x2 plate and perpendicular to it, like so:
The same connection is possible ...
- 6,727
9
votes
0
answers
274
views
I got a vintage roof brick that is very nice but can’t find what it is?
I got these parts in a lot, but can’t find any history or brand or set on them?
9
votes
0
answers
254
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, ...
- 91
8
votes
0
answers
102
views
How to effectively attach mirrored stickers to an interior curved surface?
I'm working on 10283, Space Shuttle Discovery and I've reached pack 13 step 282 where I'm assembling the cargo bay doors. These doors have reflective stickers that attach to the insides of the curved ...
- 83
8
votes
1
answer
263
views
Motor problems in 60051
The motor in my High Speed Passenger Train set (60051) has stopped working properly. I just put brand new batteries in and it acts just like if they were worn. Moreover, the little brown capacitor ...
- 181
7
votes
0
answers
189
views
Can anyone identify this trans-neon green piece?
I've got two of these little fellas in my mixed box circa 2000. No markings and no ideas!
Dish 2 x 2 Inverted for reference.
*edit, added Antenna Whip 8H for another reference
- 71
7
votes
0
answers
140
views
Help identifying bricks - non lego
Please help me identify this non-lego brick set. I got this bricks set in the 1980's and had a lot of fun with them. But I cannot find what they are. I lost the box, but i remember there was a castle ...
- 71
7
votes
0
answers
214
views
Looking for a PC controlled motor that allows for very small and precise movements
The image below is a LEGO specimen stage designed for a stereo microscope. I am looking for a recommendation for a PC controlled motors that allows for very small and precise movements.
I want use ...
- 279
7
votes
0
answers
295
views
Digital tool for roller coaster physics
I'm currently working on a roller coaster MOC with a looping. I started physically building the MOC but quickly recognised that it is quite a mess to build something, tear it down rebuild it, etc. ...
- 589
7
votes
0
answers
180
views
Oil for old 4.5V motor? (UK)
I've just got my old LEGO Technic motor from my loft. It works but squeals in a way I don't remember it doing (35 years ago). I assume some lubrication would help and I've seen references to 3-IN-ONE ...
- 171
6
votes
1
answer
189
views
Looking for a LEGO promotional, Christmas-themed video game from the 90s-00s about spaceships
This is one of my childhood white whales and I cannot find the answer anywhere.
When I grew up in France, I remember a very short computer game which was actually an ad for LEGO spaceships. Given the ...
- 161
6
votes
0
answers
220
views
What brand is this brick with a logo that looks like an elongated C and a square?
Can anyone tell me about this brick? There is no Lego logo on it. It looks well made and fits perfectly with real Lego bricks.
- 61
6
votes
0
answers
207
views
Was the color variation on 1970's transparent pieces really that bad or are mine unusual?
Having gone through a bunch of old 1970's Lego (I rebuild all my original sets during the Covid lockdown) I noticed that color-less transparent bricks and slopes have a lot of color variation to them.
...
- 1,212
6
votes
0
answers
245
views
Fix Lego M Motor - The hooks aren't budging
I have a Lego M motor that is broken. I'm following the instructions here to try to fix it but the little tabs that hold the plastic frame together just won't budge no matter how hard I'm pushing them ...
- 1,109
6
votes
0
answers
374
views
What is the number printed under the barcode of a Lego set?
I’ve got two sets of Lego Ideas #025 (steamboat Willie). They have the same barcode. Underneath the barcode there are some small numbers: one box has 118789 970, but the other box has 118789 017.
A ...
6
votes
0
answers
669
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 ...
- 61
6
votes
1
answer
260
views
Toa Terrain Crawler alternate build instructions
I was building the LEGO Bionicle Toa Terrain Crawler, (8927), when I saw at the back of the instructions a photo of an alternate helicopter-type build. Where can I find the instructions on how to ...
5
votes
0
answers
156
views
Converting Nanobocks builds to LEGO
Had anyone attempted and had any success in converting a nanoblocks build to use LEGO bricks?
On the horizontal plane, the nanoblocks bricks seem to be half the size of LEGO bricks (4mm x 4mm versus ...
- 706
5
votes
0
answers
135
views
IR remote 8879 - cannot control speed of the motor
I got the 7938 train set for my kid.
I hook up the battery to the receiver and try the IR remote 8879 with it.
The motor starts running/spinning, but I can not control the speed with the orange "...
- 51
5
votes
0
answers
191
views
How can I prevent rubber bands disintegrating?
These two answers partially answer this question., but I think it's worth its own question to find more options in a more comprehensive answer.
Old Lego rubber bands are known to become brittle over ...
- 2,320
5
votes
0
answers
259
views
Help identifying non Lego blocks
I'm in the UK. I've been given a box of old Lego bricks from when I was a child (80s). These were mixed in. I seem to recall they made a house perhaps? They are larger than Lego, smaller than Duplo (...
- 51
5
votes
0
answers
186
views
what plastic is used in the floatable hull of 60266 Ocean Exploration ship?
I need to know what plastic is used for the hull (dark blue) of the 60266: Ocean Exploration Ship, in order to glue a reinforcement on.
I bought this for my boys (younger than the advertised 7+). It ...
5
votes
0
answers
203
views
5
votes
0
answers
229
views
Identify brand of these non-LEGO parts
I bought a bulk of bricks, some of them are not LEGO, but the quality is perfect - gloss, fit, plates have groove, transparent parts are clear.
I would like to know which brand also produces such nice ...
- 233
5
votes
0
answers
102
views
How do I fix a loose joint between the top and bottom of the digger base?
How do I repair a loose-fitting joint between the top and bottom of the Duplo digger base? It has been used for only about a year. Is the wear more likely on the top or the bottom piece?
- 51
5
votes
0
answers
73
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 ...
- 151
5
votes
0
answers
655
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 ...
- 1,095
5
votes
0
answers
188
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 ...
- 393
5
votes
1
answer
248
views
Does anyone know what this piece is? 3224730, with a bar at right angles to two more-rectancular bits
I found this piece and don't have any idea where it came from or what it would be used for. The number "3224730 2" is stamped on the side. For scale reference, the long round bar portion ...
- 151
4
votes
0
answers
156
views
Half the size of Lego but only 1/3 the height
I bought a batch of like Lego but small off eBay. I'd like to know what brand. The ×2's have tubes, but ×1's have no pillars. Colours like Lego, red, blue, light & dark bluish grey, B&W. ...
- 189
4
votes
1
answer
239
views
Lego China Cabinet
I'm building a Lego china cabinet and I'm looking for some nice pieces to put in it. (Fancy dishes, table settings etc). Here's a picture of what I have so far:
Here's some pieces I've identified in ...
- 4,761
4
votes
0
answers
136
views
Issues with Move Hub and Controller: first connected device works, but not both
I'm having issues with the move hub 88006, the controller 88010 and the Powered Up app.
The issue is the same on multiple devices.
Basically, whatever I connect via Bluetooth first is what works, but ...
- 141
4
votes
0
answers
236
views
Weird "reflection" when rendering on BrickLink Studio
When I was rendering my train MOC build, I noticed a weird "reflection" on every black piece. What is this? Are the resolution or quality too low?
- 121
4
votes
0
answers
136
views
How to pose figs in LeoCAD?
I’m new to LeoCAD. I find it’s easy to add regular minifigs or Technic figures to a model, but I can’t find a way to pose them. For instance I could build a car and add a driver, but the figure is ...
- 141
4
votes
0
answers
47
views
How do I sync audio and movement on my NXT 2.0?
How do I sync audio and movement with my NXT 2.0? I'm building an animatronic head and I can't find a good way to sync it with external audio because the internal speaker is too quiet.
4
votes
0
answers
194
views
Migrate Lego Boost Android app data to another device
I have a Lego Boost Android application installed on device #1 and the app is logged into my LEGO cloud account (the same used for Lego Life etc. too) and is fully synced with cloud. On this device I ...
- 231
4
votes
0
answers
189
views
Repairing a 12V switch motor
My son caused me to dig up my old 12V lego trains. Surprisingly they mostly work, except for one part:
https://www.bricklink.com/v2/catalog/catalogitem.page?P=70026&idColor=9#T=C&C=9
This is ...
- 141
4
votes
0
answers
276
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?
- 81
4
votes
0
answers
580
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 ...
- 81
4
votes
0
answers
275
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 ...
- 1,095
4
votes
0
answers
526
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 ...
- 307
4
votes
0
answers
845
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 ...
4
votes
0
answers
489
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 ...
- 71
4
votes
0
answers
689
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 ...
- 295
4
votes
0
answers
507
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 ...
- 141
4
votes
1
answer
429
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:
...
- 503
3
votes
0
answers
82
views
Identify bricks, similar to LEGO without bottom tubes
I have a box of bricks with some age, that I'm unable to identify.
They have some numbers on the inside which don't help and no identifying markings. I thought they could be by Halsam, however that is ...
3
votes
0
answers
45
views
EV3 Port 1 connection issue
Port 1 on one of our EV3s is acting up. The port recognizes a sensor if the sensor is connected when powering up the unit, but if you unplug the sensor and plug it back in, the EV3 no longer ...
