All Questions
4,579
questions
1
vote
1
answer
25
views
Which LEGO set is a gray vehicle frame from?
I bought a bag of LEGO in 2020, there is a frame which I think belongs to a vehicle. I have tried to search for the gray bricks with holes of 14x1 , but I could not identify the set. I might make a ...
- 5,235
0
votes
0
answers
13
views
How can I remove a Lego 4x4 plate from a non Lego baseplate?
I have tried brick separator, bending plate, fingers,stacking bricks on it. Help please!
0
votes
0
answers
16
views
What can I do to use my RCX brick?
I got this old mindstorms invention system 2.0 and I can't get the tower to connect. I have the right battery and adapter and a working brick. I have tried the Bricx program and it is not working. I ...
- 5,235
0
votes
0
answers
21
views
Cat D11 Bulldozer (42131) set's calibration always reset
Calibration of my Cat D11 Bulldozer went without any issues. Everything worked fine. The problem came after. When I disconnect, either by Bluetooth or manually, the calibration data went out the ...
- 22.4k
2
votes
1
answer
61
views
Trouble connecting NXT 2.0 block to Mindstorms Home EV3 software on Mac
My son has finally shown an interest in Mindstorms and we are trying to use an NXT block with my 2015 Macbook Pro (latest OS) running the EV3 Mindstorms home edition software.
I have read in many ...
- 22.4k
0
votes
1
answer
249
views
How do I get missing parts for a Cobi set?
I got the 1305 set from Cobi. I am missing 3 or more pieces. I can't complete the model without these pieces:
2 normal black 1 cm high, 6 studs long, rectangular (not round edge)
1 black rectangular ...
- 445
10
votes
2
answers
5k
views
How can I catalog my LEGO pieces?
I have a fairly large LEGO collection, but not large enough that I can build anything and everything, given instructions. It's already organized quite well, but how can I catalog the pieces I have so ...
1
vote
0
answers
35
views
Unable to open port error
Since today, no matter what program that uses sensors I try to run on my EV3 I get the following error:
lejos.hardware.DeviceException: unable to open port
at lejos.internal.ev3.EV3Port.open(...
- 5,235
0
votes
0
answers
30
views
Software for designing your Lego Technic builds [duplicate]
Is there a software for designing Lego Technic builds? That way I would know which parts I really need to buy.
- 15.6k
4
votes
1
answer
366
views
Recognize these white and gray ships?
I want to get missing pieces but don't know Lego set number.
- 7,794
1
vote
1
answer
216
views
Calibration Freeze on D11
I've read through similar posts, but haven't seen exactly the same issue. Built it once, and froze during several calibration attempts. Stripped it all down, rebuilt it very carefully and still have ...
- 39.8k
3
votes
1
answer
114
views
Which LEGO set is this from?
I recently bought a second hand LEGO set which contained 1 random sealed bag from another set.
Its bag #3, the QR code on it gives number 6171968. Can anyone identify the set from the attached photo?
...
- 5,235
0
votes
1
answer
64
views
Bag Identification: Bag 5 Possible Alien kit
We have an unidentified bag #5. It matches the color palette from Space Mission 11022 bag 5: Black, Magenta, Grey, Purple, Neon Yellow.
Distinct pieces include 4 silver grey ray guns, 4 silver grey ...
- 15.6k
5
votes
1
answer
1k
views
Help Identify this Lego Item/Set
The photo is from December 30,1991.
Colors are red, yellow,
black, green and white. It was a Christmas gift for our 10 year old.
- 12.6k
1
vote
1
answer
126
views
How to import a .ev3 project file into mindstorm software
My son just built this Rubik's cube solver and I wanted to help him with the software aspect of it. Despite being a pretty big computer geek, I'm stumped!
The software instructions say to download the ...
- 141
19
votes
2
answers
12k
views
Is it possible to change the battery in a 54604 light brick?
I got 4 of these in in a bulk lot of Lego, but the lamp is getting quite dim in a couple of them.
Is it possible to change the battery in a 54604 light brick?
It looks like the brick should open, ...
- 1
3
votes
1
answer
17k
views
How do I connect the LEGO Powered Up remote control?
I'm trying to use the Powered Up remote control to control my new train set, but it doesn't seem to work. Is there some process that I need to follow to connect or pair the remote with the Smarthub?
- 1
-1
votes
1
answer
56
views
Is it possible to connect a motor to a spike hub without connecting the cables?
I know it sounds foolish but can I?
I've tried Robot Inventor, but it just doesn't connect and doesn't work.
- 15.6k
1
vote
1
answer
102
views
What set do these four bags belong to?
Found these four sealed bags. Any idea what set they go to?
- 15.6k
6
votes
3
answers
4k
views
Is it possible to re-flash the LEGO Spike Prime Hub with Mindstorms Robot Inventor Hub Firmware while retaining all functionality? And if so, how?
Unfortunately, LEGO has recently announced that after 24 years, the Mindstorms line of Robotics Kits is officially being discontinued at the end of this year. For this reason, the 51515 Robot Inventor ...
1
vote
0
answers
148
views
Upload 2 old Lego books [closed]
I've scanned 2 old Lego books of images & some instructions and can now see them better on PC. Made all animals on page 9 (in photo) apart from 1 small dog, using Lego I've had for years. Bought ...
- 445
-1
votes
0
answers
95
views
LEGO Movie Think Tank MOC Instructions
Does anyone here know how to build the think tank from the LEGO Movie?
Sources:
Reddit
Flickr
- 796
0
votes
0
answers
41
views
Two misplaced bags unknown box [duplicate]
Son got into the Christmas stash.
I have random bags with 603R1. Which set did they come from?? Thanks.
- 1
4
votes
2
answers
438
views
Does remote control 8879 work for winter holiday train?
Can anyone tell me if the remote control 8879 will actually stop and start the 10254 Winter Holiday Train set?
- 1
3
votes
1
answer
367
views
Identify this set: assemblies of black plates and tiles
I have these parts but not what set they are to.
Can you help me with what set they are a part of?
What set is this?
- 7,794
0
votes
5
answers
4k
views
Every time Robot is launched (without changing the code) it is not following the exact path
I'm working on FLL mission and every time our team launches the robot (without changing the program, and we are making sure that it is starting from same location every time) it is not following the ...
- 15.6k
48
votes
17
answers
61k
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? Has anyone tried ...
- 19.5k
-1
votes
1
answer
740
views
Missing stickers for 71374: Nintendo Gaming Console LEGO set [duplicate]
How do I get a replacement sticker sheet for this product? The one I received came with no stickers.
- 15.6k
2
votes
1
answer
86
views
What is the difference between LOCAL memory for programs and LOCAL memory for Direct Commands?
I've learned a bit about Direct Commands in EV3 and understood the work of Local and Global memory. Using the Direct Commands I can access the memory using an offset of the accessing byte/bytes (like ...
- 9,503
4
votes
1
answer
139
views
Wobble problem with the PF L motor
So I got my hands on a used 42095 LEGO Technic set that I wanted for a long time. After disassembling it and testing PF for the first time, I have noticed that one of the motors is extremely wobbly, ...
- 15.6k
-2
votes
1
answer
124
views
Where can I find the assembly instructions of the chinese Ferrari Daytona gold/black variant?
I bought on Aliexpress a Ferrari Daytona, 1:1 compatible with the original LEGO set, but it's the black/gold variant.
I didn't receive the book, as expected, but I was unaware that the set has no PDF ...
- 796
0
votes
1
answer
152
views
Is the NASA Space-Shuttle the object with most reproductions in LEGO sets?
Even within the last twenty years, there have been a large number of LEGO reproductions of NASA's Space Shuttle, e.g.
31117 Space Shuttle Adventure
31091 Shuttle Transporter
10283 NASA Space Shuttle ...
- 188
0
votes
1
answer
132
views
Has anyone had problems fitting the stalactites and stalagmites in the 76252 Lego Batcave?
I have got to stage 403 and, whilst I have had problems fitting the pieces together previously, at this stage I simply cannot get the stalactites or stalagmites to fit into the studs - they seem to ...
- 15.6k
4
votes
1
answer
166
views
Identify pieces from parts list from a video
I have a screenshot of instructions from a Youtube video that include a parts list, but unfortunately no part numbers/names.
My own experience with LEGO is limited, but I was looking for a way to ...
- 2,712
18
votes
2
answers
15k
views
Export LEGO MINDSTORMS EV3 Lab 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 ...
- 1
0
votes
2
answers
151
views
Identify this set: loose bag with rounded gears
Got this at a Staples/LEGO event and does not have any instructions. When I scanned the QR code it says 6172061 but nothing found on the LEGO website. Anyone knows what this set might be?
- 188
3
votes
1
answer
103
views
In what set does this purplish star-stickered part belong?
Hello I need to identify this piece. In which set is it related too.
- 15.6k
8
votes
1
answer
3k
views
Should the LEGO Batcave step 264 use 1x1 Technic bricks?
I've been building the Batcave – Shadow Box (76252):
I have gotten to step 264 and it seems odd to me that the single back bricks have a hole in them as they seem to go in sideways in the picture ...
- 5,235
0
votes
0
answers
110
views
Cat D11 calibration starts then stalls
My Cat D11 lego worked perfectly a few months then it stopped having full range of movements (blade, rear ripper, stairs) but still drives ok. When I try to calibrate, it starts the process but then ...
- 15.6k
3
votes
2
answers
155
views
Identify set for trans-orange assembly
I am sorting through my son’s old Lego sets and don’t know which this belongs to. The orange polygon pieces are similar to some Nexo Knights sets.
- 7,794
4
votes
1
answer
229
views
Change Mario Yoshi pose
I'm returning to Lego as an adult and struggling with what I thought would be a small project.
Please tell me if this is off topic but as it has a hard answer of no or this is how I though it would be ...
- 39.8k
2
votes
1
answer
126
views
Need help identifying this set - craft with 2 propellers
old set.
thank you in advance Pls let me know if you need additional information.
- 7,794
10
votes
1
answer
429
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 ...
CommunityBot
- 1
2
votes
1
answer
117
views
Bags in color sets with no instructions
Can anyone identify what Lego set these bags are from?
- 22.4k
4
votes
2
answers
250
views
Interface A missing PCB
I have a Technic Interface A with the cables but lack the printed circuit board (PCB) for PC that I need to use it for automating my models. The card when it was for sale had markings of Lego 9771 and ...
5
votes
1
answer
482
views
Which LEGO set is this vehicle assembly from?
I found this in my LEGO box. I’ve looked up the brick numbers to try and identify, but I can’t for the life of me figure out what set it’s from or a part of. Looks fairly recent, though I have LEGO ...
- 5,235
5
votes
1
answer
421
views
Can you help me identify this set?
I have this lone bag, and I think it contains a full vehicle, but it's from a bigger set, I believe, because of the number 2. Anyone know what set? I need instructions.
(Dear Lego, please put set ...
- 1
2
votes
2
answers
531
views
EV3 screen stuck at starting after inserting MicroSD card
I followed the official guide to download microPython and flash it onto an empty MicroSD card (SanDisk Extreme Pro 32GB), but the EV3 screen is now stuck at "Starting" after I insert the MicroSD card. ...
- 21
7
votes
2
answers
556
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 ...
- 445
1
vote
1
answer
410
views
Powered Up/Pybricks custom electronics?
The Pybricks documentation has a page for "custom devices", with a picture that shows circuit boards with Lego compatible cables attached. Additionally, the class that goes along with the ...
- 71