All Questions

Exactly, how many LEGO blocks would somebody need to support a model that weighs 30 pounds?

While staying in Venice, Italy, I came across a shopping window with what looked like a LEGO set of a gondola - except that the familiar white letters in the red top left square said "IDEA" rather ...

I have a v1 PF receiver but don't want to pay $35 for a v2 receiver and I was wondering if a v1 receiver can power a single XL/L motor and a servo.

I'm thinking about building an early 20th century ('30s / '40s) European city, using both complete sets and parts of sets as resources I'm looking for pieces that add detail to this city, both ...

I've got a program with a code lock, and I would like the program to restart when you enter the incorrect code. Does anyone know of a way to do that?

I was lately in Miami International Airport (MIA), and there are many signs displaying their array of stores within the airport. One wall I saw was showing logos of the stores in a design way, not in ...

I've been looking around for this piece, google images etc, cannot find it. Any ideas on a part number?

This is aimed at building a GBC module, not to reproduce an actual engine. I need a piston type construction with stroke length of 3 units, which means a crankshaft radius of 1 1/2 units. Are there ...

I'm aware that one can do that in LDCad but with scripting. Should I invest my time in learning SR 3D Builder or is there any other option? It's just not a very intuitive software for me but I might ...

I'm trying to make a internal coordinate system for an EV3 Python project I'm doing, but at a complete loss on how to do it. It needs to keep track of how it moves (with wheels) in an X, Y coordinate ...

I have a part built boat,but need help in identifying the set so we can complete the build. Thanks

please help identify the set that this car is part of.

Can anyone help me identify which Lego set this bag belongs to (It has two smaller bags inside)?

Recently, I got the S-12012 Light Stax kit with 50 (!) light bricks. They are different from those described in this question, but they are much cheaper, colorful and with blinking/pulsating effects. ...

I have loads of complete Lego sets, distributed into bags and without instructions.

https://www.ev3dev.org/projects/2014/05/09/Python-Rubiks-Cube-Solver/ The other one gives a solution in around 20 steps, but takes around 500 MB of memory, so I need to run it on a computer How do I ...

I have noticed that there are a few LEGO pieces that also function in the "real-world." For example, the 10830c01 Magnifying Glass can actually magnify. Another example is the 70001pb01 Compass, ...

I just received a huge box of LEGO's. There are some unique pieces such as this one. On the back of this piece is the number AM02232. What are my options of figuring out its set and finding ...

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 ...

This part appears to be one side of a Wookie ship of some sort and these parts appear to be from one set but I am not sure this appears to be an Imperial ship of some sort and this is from a walker ...

I recently bought a big box of LEGO that have some broken LEGO Star Wars sets and I need help identifying them. Some are fairly complete and some are just pieces. The first 2 are almost complete so it ...

I can’t figure out how to get my R3PTAR to open and close it’s mouth to bite. I keep getting this symbol. What does it mean?

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.

The EV3 brick started by flashing red. Then started where it is stuck on two red buttons. Have changed batteries, and manual reset with no change.

I have a relatively large LEGO collection and I would like to know roughly how many pieces I have; however, it would not be worth my time to count each piece individually. Is there a faster way to ...

I ask myself often when buying Lego why the boxes are so much bigger than the space that is needed for the contained content. It seems a waste in terms of material and logistics. I do store the boxes ...

I found about a dozen of these in a mixed bunch of LEGO. Are they actual LEGO pieces or another brand? They are actually white, the pink color is a lighting error.

To access my NXT brick connected via USB with the MindSqualls library, I do the following: var brick = new McNxtBrick(NxtCommLinkType.USB, 0); The 0 is serialPortNr. If I were to buy a second NXT ...

Just two weeks ago, my kid got a 60198 cargo train and we added a set of 60238 switching tracks. With two (out of three) switches we have the problem that the switch doesn't close properly anymore to ...

Can anyone identify this fire truck set? I’d like to find the instructions before it gets taken apart.

The EV3 brick has 2 LED sets, one on the left side of the button panel and one on the right. Software such as python for ev3dev let's you control them both individually, the normal EV3-G LED block ...

Recently, I have noticed that there appears to be no rhyme or reason to the sizing of any given LEGO set box. For example, in the picture below, you can see three sets that have a similar amount of ...

How can I download the ultrasonic sensor and open it? I want to open it on a laptop running Windows 7. Which program must I download?

Can I compare the Hitechnic block --> measure --> color output in a switch block? For example, if the Hitechnic color sensor is seeing black, then do something, else do another thing. If not, then how ...

I have an NXT but I don’t know how to make it detect colors, all it does is say “wait”. My set includes a light sensor but I heard some YouTube videos say there was a lego “color” sensor. Does LEGO ...

One of my favorite building techniques is to place a Technic pin into the anti-studs of a brick. This allows two bricks to attach bottom-to-bottom. It's a pretty secure connection, but I'm not sure ...

I have two pieces I cannot seem to separate. The parts in question are: 3062b: Brick, Round 1 x 1 Open Stud 6067: Black Boat Mast Section Base 4 x 4 x 1 2/3 The 1 x 1 is transparent in this case, in ...

I have set #60198 and it comes with one powered up motor. I'm hauling many many cars and one motor isn't enough any more. I see there is a slot for "B" on the hub. Is it possible to plug in another ...

I have a bunch of LEGO bricks from the years 1975 - 2016. There are a lot of obscure pieces in my collection, but this piece is so obscure that I have no idea what it goes to. If anyone can help it ...

I've started to build a robot, but when it drives it veers off to the left even though I'm just telling it to go straight. I think I need to do something to the motors but I don't know what or how. I'...

I have two parts which are stuck together: 4081b: Plate, modified 1×1 with clip light – thick ring 2569/25699/47094: Antenna whip 8H The parts have been assembled like this for about 20 years and ...

A while back, I heard someone use the acronym SPUA while referring to a LEGO piece. What does that stand for and what does it mean?

Just wondering if you have ever seen this figure before? https://imgur.com/a/KtGGSBa I've had it since I was a kid in the early 80's, and it's always lived with my lego (which was mostly hand-me-...

Can anyone tell me any app on the App Store so I can program my NXT? Please let it not be one of those ones that you have to pay or one of those that are just controllers. Thanks for your help.

For the current MOC I am working on, I am going to need a LEGO Minifigure-scale shopping cart. I thought I had seen one in an official set, but after searching Bricklink extensively, I am now not sure ...

My DUPLO railroad engine stops after 20cm moving. I suppose the sensor in the front axle is damaged. So is it possible to repair it?

I'm looking for the EV3-G control block for the HiTechnic Color Sensor V2, previously distributed by HiTechnic (https://www.hitechnic.com/cgi-bin/commerce.cgi?key=NCO1038&preadd=action), ...

There are about 20 of these bricks in the set. Nothing else that stands out as unique. This may be a long shot.

Newbie here. If you are sick of these posts, sorry. A friend gave us a bunch of sets with only a few sets of instructions. We were able to figure out a few of them. Not sure what these are.

My 10yo son and I have ventured into the realm of taking our LEGO hobby up a notch with robotics. We have built the makeblock mbot and adapted LEGO bricks and want to incorporate the Power Functions ...