3
votes
1answer
710 views

What are these bricks with filled interior and holes/tubes going through?

I recently bought at haul and found a bunch of these regular sized bricks. Can anyone identify the for me? They are 2x4 bricks, but with holes in the side of the bricks: From: ...
2
votes
1answer
137 views

What are the bricks in this picture/video?

Can someone please identify the pieces in this picture? I'd like to acquire these, but I'm not a LEGO enthusiast, so I don't really have an idea where to start. For reference, the picture was ...
3
votes
1answer
217 views

What is this upside down roof peak or boat hull?

Here's another mystery piece from my collection. I'm not 100% sure it's genuine LEGO, but I would love to know whether it is, and if so, what part. It attaches to the bottom of a 2x8 brick securely. ...
2
votes
2answers
157 views

Part Identification - bricks with posts

I have two unusual lego pieces that came from a collection of used legos that mostly seem to date from the 1970's that I am unable to identify using LDraw's ldfind app. What are these parts, and if ...
2
votes
3answers
971 views

NXT Brick will not update firmware

I'm running 6 NXT robots in an introductory class. Occasionally we've had bricks that would not accept a program and I've reset the brick by pushing the reset button under the battery pack as well as ...
3
votes
3answers
1k views

Is the LEGO Midstorms EV3 software compatible with OS X yosemite?

OS X Yosemite (10.10) was just released yesterday. I want to upgrade, but I am worried that the EV3 software will be incompatible. What should I do? A. Upgrade B. Stay on OS X Mavericks (10.9)
4
votes
3answers
177 views

9v and Power Functions Hybrid?

I am building a train layout and I am running some of my track through a tunnel. I would like to know if I could hook up a 9v train motor at the opposite end of my train. The front will use Power ...
2
votes
1answer
292 views

Help identify this 70s or 80s lego space set

I bought some bags of LEGO bricks which appear to contain a 1970's space set in it. I want to find instructions to put it all back together.
15
votes
2answers
2k views

How to tell the different ages of pieces

I know that LEGO bricks have changed over the years, with regards to moulding pip locations, element i.d. numbers printed inside etc, but I was wondering if anyone knows when these changes happened? ...
5
votes
3answers
190 views

Was it once possible to put a 1x1 round into a minifig cup?

I remember being able to put a 1x1 round brick into the top of a minifig cup before my dark age (the period of time that a person stops building with Lego, up to the time they pick up the bricks ...
5
votes
1answer
222 views

What lego set is this? Possibly a pirate ship?

my wife picked up this lego set at a garage sale. The owner claimed it was a ship, perhaps a pirate ship, and that the set was complete. It does have something resembling a bow, and several tall ...
5
votes
1answer
144 views

Help with identifying lego sets

Our family (with very big hearts) gave us some lego they found. But... I do not know what sets they are from. I already identified 11 sets, but cannot find the last 4 (I think) Could you please help? ...
0
votes
1answer
123 views

Identify bulldozer truck -probably from early 90"s

Have a bulldozer looking truck with green rocket boosters on it and silver arrows, silver knives on each side of the dome like top Colours: black green, clear green dome figure has clear green ...
3
votes
1answer
152 views

Can anyone identify this spinner with 1..5 and a skull?

My son has just inherited a large box of Lego, we're hoping someone can help identify what set this might be from.
3
votes
2answers
824 views

Is it possible to edit a my block input parameter value?

I have created my blocks but want to change the input parameter to a negative. Is this possible or must all the myblocks be re-written?
10
votes
2answers
649 views

How can I connect the RCX 2.0 to an external power source?

I want to build an auto-feeder with the RCX 2.0 for my cat. The problem is, that I often had to exchange the batteries. Is there an adapter for the RCX to connect it to a power point?
2
votes
2answers
881 views

Mindstorms crashes when connecting to EV3 with Bluetooth

I am using OS X 10.10 (Yosemite) on a 2011 MacBook Air, LEGO Mindstorms EV3 Home Edition v1.0 and the latest firmware on the EV3 (v1.06H) When I attempt to pair the EV3 with my Mac over Bluetooth, ...
5
votes
4answers
433 views

Can I build a faster LEGO train motor?

I was going over LEGO Power Functions train motors, and I was not satisfied with the speed. Speed seven is fast enough to derail the train on the curve, but not fast enough realistically. I am ...
2
votes
1answer
64 views

Unlimited engine option does not work

I work in a school and all my Lego NXT bricks have the same problem. Unlimited choice in the activation time engine does not work. The other functions (rotation, and second degree) are going well. So ...
3
votes
2answers
200 views

How do I make my logo/mascot into a custom LEGO model?

I operate an Indoor Playground & Cafe and would love to find out how to make my mascot/logo into a 4' custom LEGO sculpture. Any assistance appreciated! A bit of looking indicates that LDD will ...
2
votes
1answer
261 views

What set does this minifigure head come from?

I came across this picture: I think the body is from The LEGO Movie Pajamas Emmet polybag, but have no idea where the head is from.
12
votes
1answer
286 views

How to Decipher Lego Building Instructions Filenames?

On the official site for downloading lego instructions, the filenames are often quite cryptic, and many sets have as many as six different files you can download and sometimes it's hard to tell which ...
5
votes
1answer
157 views

Is it possible to create your own wheel?

After my other question, i pretty much have a bicycle design all planned. My problem now is with wheels. None of my LEGO wheels are big enough to work on a bike. And, the biggest ones are all pretty ...
26
votes
11answers
12k views

What tool can get two 1x2 plates apart without damaging them?

Teeth and pliers tend to leave unsightly marks on the bricks. Fingernails don't work too well. What tool do you recommend to separate them?
2
votes
1answer
317 views

LEGO TECHNIC CyberMaster Software

I come again to ask a favor. Can someone share the installation CD in English of LT 8482 CyberMaster or where can I download the software in English??
5
votes
2answers
292 views

Chinese Knockoffs?

I'm looking at the Lego Super Star Destroyer on eBay and I see that a number of people are selling it for ~$600 USD. From time to time there are bids that sell at ~$300 USD that claim to be sealed and ...
6
votes
7answers
431 views

How can I remove permanent marker from a LEGO brick?

I need to remove permanent marker from hard plastic. How can I do it?
1
vote
1answer
195 views

Lego EV3 - sending direct commands over RFCOMM Channel (Objective-C, Xcode)

I successfully open RFCOMM Channel to Lego EV3 brick with code: IOBluetoothDevice *device = [IOBluetoothDevice deviceWithAddressString:@"xxxxxxxxxxxx"]; IOBluetoothRFCOMMChannel *rfCommChannel; ...
5
votes
1answer
218 views

Flash update breaks the Mindstoms NXT viewer

After udating to the lastest version of Flash on my Macbook Pro (OS X 10.7.4) The Mindstorms NXT software that comes in the box no longer displays the build instructions. It does load up, but the ...
3
votes
1answer
940 views

How do I get the Mindstorm EV3 software to recognize an NXT brick via Bluetooth?

I'm trying to program my NXT brick via the EV3 software over a Bluetooth connection. I can connect it via USB (although that too failed initially but has since resolved; not sure why) but I'd really ...
0
votes
1answer
231 views

software for lego nxt 8527 [duplicate]

where can I get an updated software version for my lego nxt 8527? I bought my lego nxt some years ago and now that I want to use I can install the software on my current computer.
5
votes
4answers
272 views

Removable glue for LEGO models

I want to glue my 4-year-old's LEGO bricks, but I want to be able to remove the glue when he is older. What is the best glue to use that is removable and okay to use on LEGO bricks?
5
votes
2answers
415 views

Communication between two Ev-3 bricks

How the communication between two Ev-3 bricks is done over Bluetooth? What is the nature of data that can be communicated?
2
votes
2answers
542 views

Can't get EV3 to work with touch sensors

My FLL team just got a couple of EV3 sets and the kids were trying to program a simple switch that has the robot drive into a wall, back up, and turn right once the touch sensor in the front is ...
0
votes
2answers
69 views

What kind of design is comparable to these programming concepts?

I understand this may sound like a weird question, but bear with me here, OK? I'm getting ready to teach some kids introductory computer programming. We're going to use Scratch, a drag-and-drop ...
11
votes
1answer
940 views

Can I pitch an idea to LEGO?

How would I contact LEGO about an idea for some kits to be built and sold? I have designs for simple kits that I have built for my son that I think would be very popular.
3
votes
1answer
47 views

NXT brick not executing programs correctly

I have an issue that I am hoping someone might be able to resolve: We're using Mindstorms in the classroom as part of a STEM program and have one NXT brick that wont execute programs correctly. The ...
3
votes
2answers
104 views

Gearing down a PF XL

I'm looking for the best way to gear down a Power Function XL. I need to achieve a very slow output RPM (less than 1-2 RPM). I've tried a 625:1 gear (trough 40:8 gear). Can someone link to a well ...
2
votes
1answer
156 views

Lego EV3 doesn't respond to direct command

I tried to execute command (via bt) play tone: play_tone = '\x0F\x00\x00\x00\x80\x00\x00\x94\x01\x81\x02\x82\xE8\x03\x82\xE8\x03' # send commands to EV3 via bluetooth with ...
8
votes
4answers
12k views

Are there any lego base plates that are compatible with duplo?

I'm thinking of making a lego table but my 2 children both use different lego. My oldest uses normal lego and my youngest uses duplo. Just wondering if there is a base plate that both types of lego ...
3
votes
1answer
82 views

How can I tell if my NXT motor is faulty?

I pulled my old Mindstorms NXT out of storage (it's been there for a few years). After patching together a test robot, I noticed that my motors behave strangely. At first, one of the motors did not ...
5
votes
2answers
346 views

Any way to create a gear+chain, like for a bike?

I would like to create a LEGO bike. I can imagine how most of it would work, but i'm stuck at the chain. I need a way for the turning pedals (at one spot) to cause the wheel (in the back) to spin ...
6
votes
1answer
115 views

Preparations for outside display

I am thinking of using LEGO to make some outside yard art, (large minifig scale castle) and wondered what I should do to prepare them for being outside in variable weather conditions (in the Seattle ...
6
votes
2answers
174 views

Fixing poorly applied stickers

Does anyone have any tricks to removing a sticker and reapplying, after a significant period of time? I recently purchased a lot of sets from 2000-2010 range, and the stickers look like they were ...
16
votes
4answers
5k views

Are all the Magnet minifigs now glued on and how should I remove them?

A couple of years ago (around 2010 I think), I bought a number of the Star Wars magnet sets, as they looked like a (slightly) economical way of buying a number of specialist characters (including the ...
4
votes
1answer
81 views

What are the curve radii for the curved slope pieces?

Does anyone have a table with the curve radii for the curved slope pieces? If not, does anyone have a good idea for measuring a third point on the curve? Since I know the front and the back ...
8
votes
4answers
12k views

What are some examples of advanced train layouts possible with the PF train sets?

I recently got my first train set, the Constitution Chase, and it has sparked my imagination for building train layouts. My 3-year-old son has a small collection of wooden trains and we enjoy building ...
2
votes
1answer
351 views

How to locate objects, and move towards them, without pre-programming the path

So I need to find objects in an enclosed area, I have access to the standard set of NXT sensors, i.e. ultrasonic/light. However, the ultrasonic sensors seem to be very unreliable and erratic, in ...
3
votes
2answers
258 views

What are the largest LEGO® Power train sets available commercially?

What set(s) are the largest by number of pieces? These sets could be retired or existing. I am also curious what set(s) have the most rails pieces included.
7
votes
3answers
1k views

How to Make a Lego Claw Arm?

I am trying to build a lego claw arm to pick up stuff that is out of my reach and I need some ideas on how to design it. I would like a mechanism to be able to open and close the claw from the ...

15 30 50 per page