2
votes
1answer
58 views

How to make NXT bricks communicate information?

Is it possible to connect, in some way, two NXT bricks that has program functions running on both. For example, Brick one would tell brick two that it is okay to start a program. Are there any sensors ...
2
votes
1answer
326 views

NXT or EV3 gyro sensor

Do NXTs or EV3s have gyro sensors or built-in gyro sensors? How can I know the direction of the robot?
2
votes
1answer
262 views

I have a 16x16 stud clear base plate. Where is it from?

I found another grab bag treasure. I ended up with a 16x16 stud clear(ish) base plate. A quick look at bricklink gave me a no items found message. I'd like to know which set(s) this piece can be found ...
2
votes
1answer
272 views

Will Lego Caboose (10014) work with Lego Cargo Train (7939)?

Will at the older Lego Caboose (10014) work with the Lego Cargo Train (7939)? I wonder if it will fit the newer track and if the magnet couplers will still work?
2
votes
2answers
171 views

identification of lego set by color and shape of inner box

I'm trying to identify a lego set only knowing the color, shape of in inner package. The inner box is blue, dimensions are 18 x 11 x 2 3/8" and 9T plastic compartments, There is a 1984 Lego Catalog ...
2
votes
1answer
239 views

Pushing lego city train [duplicate]

Are you able to push the lego city train around the tracks without damaging it or do you always have to use the batteries to make it go.
2
votes
3answers
1k views

What is a normal range of reading of the Light Sensor using EV3 Raw Sensor block?

EV3 software does not support the Light Sensor. It does support the Color Sensor. The solution is to use the Raw Sensor Block. What is "normal" for raw sensor block readings? I'm getting readings ...
2
votes
1answer
80 views

When and where was the first “official” fan organized Lego Convention held?

I just attended BrickCon 2013 here in Seattle (I wore my new StackExchange T-shirt). When and where was the first "official" fan organized Lego Convention held?
2
votes
2answers
517 views

What is the difference between nxtG and nxt 2.0?

I'm familiar with NXT 1.0 and 2.0 but I've also seen reference (program samples, etc.) to NXT G. What's the difference?
2
votes
1answer
44 views

Could I do datalogging in Mindstorms EV3 Home edition?

Apparently datalogging is an integrated part of the educational EV3 software. But I got the Home edition. Is there some module or thing I can use to get datalogging functionality in my Home edition? ...
2
votes
2answers
82 views

NXT Motors curving to the right

The NXT motors have been curving to the right by about 10-20 degrees. We have checked the program, no curves. We have checked the wiring, but it is also plugged in fine.
2
votes
1answer
46 views

Have Multiple Inputs to Programming Block

Originally, I had a simple program to move until the robot hit a wall, then it reversed and turned and moved again, repeated to infinity. It works by turning the motors on, waiting for input from the ...
2
votes
1answer
68 views

Variable stick lengths and angles at nodes of building bricks

Is it possible to build 3D toys connecting several LEGO Bricks sticks/rods to make polyhedrons? Lengths and angles between sticks should be variable.
2
votes
2answers
184 views

What kind of “Lego” figures are these?

Can anyone tell me about these lego-compatible figures? They clearly aren't lego brand, they don't look like mega blok figures or tyco figures that I have seen (not that they couldn't be one of those ...
2
votes
1answer
108 views

Opera house 10234 book 2 instruction 20 left hand side and then 22 has got me stumped. Can't figure out how these pieces fit. Please help

Opera house 10234 book 2 instruction 20 left hand side and then instruction 22 has got me stumped. I am not sure whether there is a space between the "high 2 and the blue 4. Please help
2
votes
1answer
148 views

Light on color sensor is blue

We had the sensor color on red and it was working with our remote. We changed the batteries in the 'brain' and now the light sensor is blue and won't work with the remote. Any suggestions? It's a ...
2
votes
2answers
126 views

Creating ski gondolas/tramway with Duplos

I've got a three year old who just came home from a ski vacation where he was enamored with the gondolas (like below). I want to make one with Duplos for him. I'm most of the way there, but have a ...
2
votes
1answer
221 views

Is the LEGO Mindstorms EV3 brick waterproof?

I am trying to build a ROV (Remotely operated underwater vehicle) with Lego Mindstorms Ev3. Is it waterproof?
2
votes
1answer
243 views

Any substitute / schematic for Mindstorms 2.0 IR tower?

I came across a used Robotics Invention System 2.0 set, but in addition to a few missing bricks, it is missing the IR tower. Is there any generic replacement that I can use to program the RCX or does ...
2
votes
2answers
411 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 ...
2
votes
1answer
316 views

can't send multiple commands to EV3 using Python

I want to use Python to send commands to an EV3 brick. In C++ things work as expected - for instance, this starts the motor on port A and then stops it after a while: #include <unistd.h> ...
2
votes
1answer
145 views

Pneumatic set pistons getting sticky

My sons "9641 Pneumatics Add on Set" now suffers from stiction. How can this be fixed? Can it be cleaned? Is there a recommended lubricant?
2
votes
1answer
374 views

Can EV3-G MyBlocks be recursive?

Imagine I create a MyBlock called "function1" from a line of blocks. Can I call that block from within itself? This is the program for the block "recursiveTest." Will this block function properly? ...
2
votes
1answer
172 views

Retrobrite cleaning on old cellulose acetate bricks?

Is Retrobrite (cleaning with hydrogen peroxide, oxyclean, sunlight) effective or ineffective or, worse, downright destructive on old cellulose acetate bricks? My understanding is that method of ...
2
votes
1answer
113 views

Trouble finding plastic storage bins for MOCs built on 48x48 stud (gray) baseplates - Ideas?

I have a number of models built on gray baseplates that are that are proving to be difficult to store/transport. Lidded plastic bins would be ideal, but I'm having a lot of trouble finding bins with ...
2
votes
1answer
173 views

On what plane is 7292 Propellor Adventures based?

The set 7292, Propeller Adventures, features a twin engine airplane. It looks a bit like the de Havilland Mosquito, but not quite. On what plane, if any, is it based?
2
votes
1answer
173 views

How does cleaning yellowed Lego bricks affect their clutch power?

Will cleaning yellowed bricks (via the retr0brite solution) decrease the clutch power of lego bricks? I've also heard that certain colors of embellishments on the minifigs or bricks do not hold up ...
2
votes
3answers
9k views

How do I unlock the sunday surprise on the 2013 Star Wars Advent Calendar?

I'm trying to enter the code on the back of door number 1 into the Lego Star Wars site but it doesn't work. Does anyone know how / where to input the code?
2
votes
1answer
163 views

Using motors to ring a bell?

I would like to create a motor set up so I can use it to ring a bell inside a small tower. Since I haven't used any of the current LEGO motors was wondering what the group would suggest. which ...
2
votes
1answer
216 views

LEGO stormtrooper variation

I found several LEGO stormtroopers on a toy box. They each have a plain yellow head and the words "LEGO 2002" in big letters in their backs. Did they come from a set?
2
votes
1answer
17k views

EV3 additional build instructions - PDF download or print possible?

The EV3 retail edition comes with printed instructions to build only one of the possible robots and it appears you have to use the software to view the build instructions of the other models. My ...
2
votes
1answer
392 views

How to efficiently identify bricks and their names? [duplicate]

I've found http://rebrickable.com/myparts linked in one of the answers here on this site and I'd like to list all of the parts I have at home (probably a thousand or two). The problem is, there is a ...
2
votes
1answer
194 views

Will learning about EV3 transfer to Lego RCX software/hardware?

If I attend a workshop on EV3 will that knowledge help me get up and running with RCX software and Lego Mindstorm kits we already have at our school? I know EV3 is backwards compatible with NXT but ...
2
votes
1answer
213 views

NXT Programming not working

I recently got back into NXT stuff (keep in mind I have a NXT 1.0). My screen was broken,but got that fixed. The software works,but I think the programming doesnt. I made it so If I push a button,the ...
2
votes
1answer
80 views

Replacement stickers [duplicate]

Can I purchase a sheet of stickers for 4643 Power Boat Transporter? My son got the item as a gift and a friend of his put the stickers on wrong and he is very upset about it.
2
votes
1answer
117 views

NXT brick erratic programming behavior

I think I have a defective NXT brick. It has been programmed to move in a direction for 1 second, wait 1 second and then move in the reverse direction for 1 second. The code downloads on another ...
2
votes
1answer
761 views

Which LEGO boxes are compatible?

TLG has produced a number of sets which come in reusable plastic boxes. I'm curious to know which of these are able to be easily stored together. Primarily, I'm wondering which boxes can be stacked, ...
2
votes
1answer
393 views

What disinfectant can I use on used LEGO parts? [duplicate]

Possible Duplicate: LEGO cleaning techniques and tools I usually purchase LEGO parts at yard sales and the like and would like to disinfect them before using them. Can I use any spray ...
2
votes
1answer
35 views

How to import an unofficial parts archive into LDraw?

I recently created a basic EV3 robot in Lego Digital Designer and exported it as a LDraw file. When I opened the LDView file, the EV3 elements were missing. I then proceeded to download an unofficial ...
2
votes
1answer
68 views

How can I use bluetooth on my phone to run a program on the EV3 brick?

I tried the Commander app but it seems to just let you control individual motors. I would like to run the various programs I have made using an input on the phone through Bluetooth Is this possible ...
2
votes
1answer
77 views

Best system for lifting things without pistons

So I am Building a Big walker thing with a mining laser on bottom that can be lifted on one half and the other attached to the vehicle but I cant seem to find a way because the hooks attached to the ...
2
votes
1answer
80 views

Lego RCX 1.0 problem with communication

I have a problem with communication between the tower (it's installed and it's working - green light when communicating by IR ) and a RCX 1.0. It's not downloading .lgo file. I've tried with few ...
2
votes
1answer
332 views

Programming Mindstorms on a chromebook

I know there is no official way to program NXT/EV3 on a Chromebook. But a Chromebook can have Ubuntu installed via Crouton in developer mode. So, is there a relatively painless way to program ...
2
votes
1answer
168 views

Are there LEGO compatible CAD Files For Injection Mold Manufacturing?

I've designed some fun building brick sets that are compatible with LEGO but I know the market for them is smaller than what LEGO would be interested in. I've contacted some manufacturers at ...
2
votes
2answers
101 views

Is there a LEGO clamping tool?

Sometimes we cannot easily attach 2 LEGO pieces. Is there a tool to help clamp together LEGO pieces that are very tight?
2
votes
1answer
117 views

Trying to get a modified traffic signal challenge worked out

The challenge is for a robot to go around the perimeter of a rectangular field and execute 90 degree turns when it gets within 4.5 inches of a wall. Simultaneously, if the bot encounters a red flag, ...
2
votes
2answers
341 views

Looking for a Basic Lego set with mostly large bricks

I am looking to buy my son his first set of LEGO bricks (because my mom will not give me my old ones!!!). Most of the 650ish piece sets I have looked at contain a large amount of 1x2, 2x2, etc. I am ...
2
votes
1answer
269 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??
2
votes
1answer
128 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 ...
2
votes
1answer
103 views

How make robot turning going straight?

I have been struggling with this function for a while. I want my robot to turn left until it detects black then turn right until it hits black again. Then, I will divide the angle in half and call ...

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