All Questions

We're having an issue with the EV3 Brick and Commander app bluetooth connection constantly disconnecting. The brick just stops responding, so we turn the brick off to disconnect and then reconnect ...

The only detail I've found so far is that the pull-up resistor should be 82k ohm. I'm wondering If I could just get something like this Adafruit Gyro/Accelerometer and just hook it up to the SDA and ...

I saw this piece used as a foot in someone's MOC and I can't figure out what it is. It kind of looks like a bionicle foot but it doesn't match any that I know of. Pretty sure that the axle going ...

I got another police set cant find directions.

I need your help to identify this set. Thank you .

Can you please help me identify this set.

I designed a model in LDraw/LeoCAD and exported it as .3ds file. I thought that I can import .3ds file to edit it later. Now I want to edit the model but I don't see any option to import the .3ds file ...

I'm interested in experimenting with custom LEGO Powered Up peripherals. Are there connectors available that I can use to interface with the hub?

I recently got me the Rough Terrain Crane 42082 and had lots of fun while assembling it. I find it a decent Technic build and worth the price. Still I find it under-motorized. I would like to drive ...

Set 1 Set 2 Thanks in advance for the help

While watching clip of the LEGO Movie, I found a strange part: Slightly earlier in the video, its part number is shown as 3649. But it doesn't match the 40t gear I know nor the pictures on bricklink....

I found this LEGO brick and have no idea what it does, it’s name, or which set it is from. It is a 2x4 brick with a 2x3 base plate with a rounded end and a hole in it. Can anyone tell me about this ...

We got this big box of Lego bricks, and we don't have the manuals, please help!

I am working on a similar model of Sariel's Tiger XL in prep for my own designs of a few other German WW2 tanks, and need some help identifying a part or two. Does anyone know what the two parts are ...

Background I was forced to completely disassemble a duplo locomotive. My son played with it in a sand box and, guess what, it was not working anymore. I used a small brush to clean everything single ...

I have a fresh install of Mojave and of Mindstorms Ev3 home edition. It seems to work fine but then randomly all the information disappears from the blocks at the bottom of the screen, and sometimes ...

I created a custom image for a test, and everytime I download the program to my brick, the image shows up in the folder despite me not using a display program. How do I fix this?

I have an ultrasonic sensor attached to a motor so that the sensor can rotate. Right now it stops once it scans a value less than 65 cm. What I want it to do is to scan its surroundings and then face ...

I would like to simulate an oscillation movement of 120/100 degrees around a fixed point. Something like this one: Basically, I want to rotate a gear around its axis, but only have a partial ...

I heard speculation that set 40358 "Bean There, Donut That" is the only set that LEGO ever produced where the name of the set is also a joke. Is that true? Or are there other sets names that contain ...

Can you help identify this ship section from a box of LEGO parts we have now? It looks like it was in an epic battle.

I like to control a drawing robot that I am building with EV3 Commander App. The problem is that EV3 Commander App stops the motor as soon as I release the slider. Is there are option with EV3 ...

If anybody could tell me what BIONICLE this is I’d greatly appreciate it, it’s driving me mad! 😡

Turning Ev3 precisely has been a problem. Do you use a mat for running EV3 on. Can you tell me on what material to get the mat printed?

Can anybody help me identify this LEGO model from this old picture. My son built this around late 80's / early 90's. The closest I can find is the 6956 Stella Recon Voyager set. Same colours and ...

I have 2 bags of unopened Lego bricks but I cannot determine what set they belong to...bag 2 344R6 and bag 4 344R6. They are probably from Lego Junior. I can tell there is a zebra character minifig ...

What kind of cleaning products are good and safe to remove smudges and finger prints off clear LEGO parts? Normally I would just use the Clorox wipes. The parts in question are 1x2x2 panels in clear ...

Based on the answer here it seems that resistors are used to detect what is plugged in with LEGO Power Functions 2.0. So which resistor values (or ranges) apply to which motors or other devices? Are ...

My kids have inherited a massive LEGO collection. 90%+ is in mint condition, still sealed. There are thousands of sealed boxes - currently kept in storage. There are plenty of open sets that the boys ...

I saw that Laurens Valk in THE LEGO® MINDSTORMS® EV3 DISCOVERY BOOK thanks John Hansen for the EV3 screen capture tool, and, upon further investigation, I found and installed Bricx Command ...

Does anyone have the pin out spec for Power Functions 2.0? Have tried Google and Lego Ed for answers Is there a source for the connector and receptacle? I could not find any data on the connector

What is inside the M motor in the new Powered Up system? How is it different from the older Power Functions motor?

Does anyone have the new Power Function 2.0 specification or pin out?

Can anyone tell me what set this bag belongs to? It could be 2011 but not sure.

Bag indicates that it was made in 2011.

Help me identify what set this small bag goes to?

The way the Boost/Powered Up connectors are designed, it's not possible to have multiple motors on the same output of a hub like it was possible with 9V or Power functions. However, since I only want ...

I'd like some help identifying the black parts circled in the photo.

I'd like to hack the receiver / motor so I can control it from my Mac (or a PC if there is no other way). Recently LEGO released an app-controlled Batmobil - product detailed are here: https://shop....

I've just started using LeoCAD to generate instructions for a model I want to share. I've been able to get it working despite the sparse tutorials. But in looking at my results so far I see that I'...

I realize a similar question has been asked (you can view it here) however mine is slightly different. I have a Lego Mindstorms EV3 Home Set 31313 and due to recommendation, I installed Lego ...

I've successfully built model A of the Air Race Jet but with model B I've got stuck on page 7, instruction 8. How do you do that?

I have a minifigure and I am trying to determine it's value - I'd like to know whether it's worth holding on to it for longer, or if I would get a reasonable price for it now.

They all link together. I added a normal lego to compare size.

Recently, I bought a large LEGO collection in which, during the sorting, I found some pieces I'm completely unable to identify. Moreover, seeing some of them I doubt if they are LEGO at all (could be ...

While building 60150 Pizza Van, I noticed that the first few steps of building the eponymous vehicle have you place lime green 1x2 tiles in specific positions and black 1x2 plates in others: These ...

I recently got a bulk lot of official Lego pieces from a charity shop. Amongst my treasures I discovered a load of these bricks (about 40 or so). At first I thought they were some of the first Lego ...

The EV3 brick has only four output ports (A B C & D) to run motors. Is there any way to use port 1 (sensor port) to control a motor?

I have EV3 Retail edition and I like to buy required sensors and build the robots come with the education edition of EV3. I have lots of LEGO Technic spare parts so I expect I can find alternate parts ...

I leanred that EV3 Ultrasonic Sensor (45504) is out of stock for a long time. I wonder if the sensor is being discontinued due to accuracy problem? Is there any alternate version of "Gyro Boy" that ...