All Questions

Filter by
Sorted by
Tagged with
8
votes
4answers
471 views

City scale connection for five-bladed helicopter rotors

I want to build a Super-Puma helicopter in city minifigure scale and form, I have the basic design planned, but I am not familiar with any five-sided technic connectors, which I will need for the ...
3
votes
1answer
238 views

What is the biggest LEGO-compatible one piece wheel?

I am wondering what the biggest LEGO one piece wheel is? (the inside part and the rubber part counts as one piece in my world)
2
votes
1answer
41 views

Use D output in 42099 (4X4 X-treme Off-Roader) set

How I can use the D output for an additional motor in the 42099 set? Or how can I use a custom control skin?
2
votes
1answer
46 views

How to prevent PF M-motor from springing back

I'm currently building a car with a simple 2-speed remote controlled sychronized transmission, shifted by a PF M-motor. Everything is fine except for one thing, the transmission driving ring is ...
1
vote
1answer
102 views

What does this error symbol on the EV3 mean?

I get this error image pop up when I power on my EV3. What does it mean? Also, is there a list of different error codes anywhere, I looked in the User Manual and I could not see anything. Cheers!
2
votes
1answer
82 views

Servo steering with 88004 motor and 8878 battery box?

I would like to build a servo steering (not remote controlled). Besides the direct physical connection between the steering wheel and the wheels, the rotation of the steering wheel would be used to ...
10
votes
2answers
300 views

What's the time on the LEGO clock tile?

I am reasonably confident that this tile is meant to be 2:57:38, but I am wondering if anyone knows why this time might have been chosen? I also recognize the Disney clocks all have a different ...
3
votes
2answers
403 views

Can you use a beveled gear as a pinion?

I would like to use the PF servo motor for steering, however it is very large - I was playing with the idea of having it mounted vertically, and then using bevel gears to change the direction of the ...
6
votes
1answer
398 views

PC To NXT Brick via Bluetooth

We have a fully-working java programme 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 ...
2
votes
2answers
195 views

How can I prevent my finger from getting injured between gears?

Recently I was building a prototype for a LEGO tank chassis and I tested it, but my finger got caught between the gears, resulting in my finger getting cut. Are there any ways to prevent that from ...
0
votes
2answers
115 views

Scarcity of electric parts: motors etc

Having bought parts in bulk several times I came to realization that electric parts are scarce resource in Lego world. The cost of plastic parts comes at around 10% of original price but there are so ...
-1
votes
1answer
87 views

Ideas to help develop a child's engineering skills?

My son is 7 yrs. old and has really creative ideas with his bricks. I see it challenging him and wonder, "How can I help develop his product engineering/design skills?" What kind of tasks can I give ...
6
votes
2answers
2k 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 ...
6
votes
2answers
562 views

Separate LEGO Technic wheel from 3 pin hub

How to separate a 3 pin wheel hub (part# 92909), from this wheel (part# 44772), in order to replace it with another wheel, such as part# 22969?
5
votes
1answer
338 views

Where does this green plane fuselage piece come from?

It has the year 2005 on it and the number 22988 I think. Anyone know what it is?
7
votes
1answer
288 views

Information on this large beige motor w/battery box?

I have a LEGO Technic motor with a built in battery box for x3 "AA" batteries (thus 4.5 volts). Could you help me identify it? What set does it belong to and how old is it? Colours are beige and green/...
5
votes
1answer
217 views

What is this motorized LEGO piece?

My brother bought a big tub of LEGO recently and found this piece inside. He doesn't know what it is and we can't find anything about it online so we were wondering what it is. He says it isn't in any ...
14
votes
2answers
1k views

Are these bricks old Lego/Duplo clones?

Can anyone identify these bricks, which I suspect are Lego/Duplo 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 ...
1
vote
2answers
157 views

Separating old 2 x 4 brick with wheel holder

I am wondering if anyone knows of a way to separate the clear bottom piece from the brick on part# 7049b "Brick, Modified 2 x 4 with Wheels Holder Old and Trans-Clear Bottom" without breaking anything....
8
votes
2answers
405 views

What about these old houses?

I recently inherited two old Lego buildings. Unfortunately I have virtually no information about the history of them other that they been part of the inventory of an old hardware store closed a decade ...
15
votes
1answer
2k views

Which old Technic set included large yellow motor?

I am trying to find the number or some other identity of a Technic set I remember owning as a child (so it was probably bought in the 1985-1995 year range, more likely in the 80's half of it). Among ...
3
votes
1answer
100 views

Which part is this grey pillar?

I am wondering which set this part is from. I'm trying to make a set complete and this part clearly doesn't belong to it when I check the sets parts list.
-1
votes
2answers
116 views

Advice on selling a lot of Lego? [duplicate]

I have a bin of Lego with a bunch of $100+ sets. The bin contains 29lbs. of Lego. I want to sell them, how should I price them? There are sets like 7743 and such. They are in pristine condition. There ...
6
votes
3answers
868 views

How does the DUPLO Action Bricks work?

Does anybody knows what is the technology the DUPLO Action Bricks are based on?It is not any RFID or NFC because I printed out the white one on normal white paper which turns lights on/off. The symbol ...
8
votes
1answer
1k views

LEGO plate with square holes?

I have some white plates with square holes on the underside. I'd almost think they were some imitation brand if they didn't have LEGO stamped on the studs. Can anyone tell me the history of when ...
2
votes
1answer
70 views

How to distinguish between objects using a sonic sensor?

I am trying to find a ball in the field, grab it, and drop in the specified area. I'm using an ultrasonic sensor on the front of the robot. My current solution for locating the ball is: Turn ...
-3
votes
1answer
117 views

Hi. I’d Like To Identify The Bricks In The Picture

I’d like to buy these bricks but I’m having trouble identifying some of them.
4
votes
1answer
171 views

Can you identify the set? Maybe a crane?

We obtained this as part of a bulk lot. Please help me figure out which set it is from. A Web search found many cranes, but not like this one. Could be a MOC ;-)
8
votes
1answer
428 views

What brick is this? 1x2 with holes in the short sides

This is my first time doing something like this, so here goes. This is a 1x2 blue brick with holes on each end. Through a hole, you get this view of the center peg and the light coming in through ...
4
votes
1answer
407 views

Brick or set ID for part?

Going through 130 lbs. of 5 decades worth of parts and can't ID this one part. Anyone know what it is or where it's from? It appears to be old light gray but may just be really dirty light bley. It ...
7
votes
3answers
27k views

Lego Mindstorms RCX RIS 2.0 IR tower Windows 7 / 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 ...
0
votes
2answers
98 views

Publishing instructions for MOC based on Lego Technic set

Are there any copyright issues in the case of creating a MOC based on a Lego Technic set, and then publishing my own instruction and/or video for it? Regards, Pavel
5
votes
2answers
864 views

Help separating a 6L stick with stop ring & 1x1 cone

I have a 6L stick with stop ring & 1x1 cone stuck together. I've been trying to separate them without success. Any advice?
1
vote
0answers
141 views

How do you make a custom Lego piece/figure?

I have googled this countless times and there just isn't anything close to what I want. I want to be able to print and design pieces: minifigure accessories, minifigure designs, pretty much make my ...
0
votes
0answers
132 views

Please help identify this Ausini piece

The one that looks like a rocket head or a projectile tip. Edit: "I hoped there was a corresponding Lego piece. No there is no inventory on the instructions."
3
votes
0answers
200 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,...
1
vote
0answers
294 views

Is this from a Lego set?

Can anyone tell me which set this is from? That would be great.
5
votes
2answers
269 views

How to disassemble LEGO train engine base part# 28743?

I have one of the new Bluetooth engines (part 28743, but in the bottom it says Hub No 5 model) that has started to under-perform and make some noises, I think that it need some maintenance (maybe due ...
1
vote
2answers
251 views

I need help finding what set these pieces are from

I recently found a bag of pieces from an older set that I lost the instructions to, and I don't remember the set name. The set was a blue plane, and the cockpit pieces say AM 02066 and AM 02067. I ...
0
votes
3answers
130 views

Please help identify this set & figures

Please help identify this set, and which sets these figures are from. Thanks!!
0
votes
1answer
89 views

How to make an object glow in Studio (Bricklink)

Is there a way to add glow color to objects in the Studio Bricklink? The thing I am trying to do is to make a glowing bulb so I can have it as a light source in enclosed areas (Like a room) and have ...
2
votes
2answers
126 views

Which set is this LEGO car?

Please help me to identify the LEGO set. Thanks!
33
votes
5answers
15k views

What is the largest single LEGO piece?

What is the largest single LEGO piece ever produced? This does not include LEGO affiliates like Duplo. Clarifications It must be a purchasable block. By largest, I mean largest by Volume/Weight of ...
7
votes
2answers
630 views

Ultrasonic problems with the red and blue balls?

I'm still new to NXT, I try to make the robot locate a ball using the ultrasonic sensor, while there I should be in a square area marked by white color. How can I make the robot locate the object (by ...
4
votes
2answers
123 views

Selling: Assembled or Disassembled?

I have several complete Lego sets that are assembled. I would like to sell them and want to know if I should ask a higher price if I disassemble them and organize the pieces? I also have the ...
2
votes
2answers
1k views

Where is this knock-off LEGO brick from?

These are some of the non-LEGO pieces I had in my LEGO collection when I was a child, and I was told they were old LEGO, but any site on the history of LEGO completely failed to show anything like ...
0
votes
2answers
134 views

What is the rarest LEGO set ever produced?

Is there a general consensus on what the "rarest" LEGO set of all time is? And if so, then what is it?
2
votes
1answer
158 views

Why is the EV3 Ultrasonic Sensor (45504) out of stock?

The EV3 Ultrasonic Sensor (45504) has been out of stock for a long time. Is the sensor discontinued due to an accuracy problem? Is there an alternate version of "Gyro Boy" that works without the ...
10
votes
3answers
1k views

Are these LEGO Star Wars bricks genuine or fake?

I bought some LEGO pieces from eBay, and I'm not sure if they are genuine LEGO. I compared them with my LEGO, and every piece of my LEGO has the logo ©LEGO on it. However, only some of the ones I ...
6
votes
1answer
439 views

Which subtheme did the “Space Monorail” sets come under?

Many years ago I remeber attending a model railway exhibition and one of the railways was a Lego monorial that looked very "space" based. I've found 6990 (Monorail Transport System) and 6991 (Monorail ...

15 30 50 per page