Questions tagged [robotic]

Anything related to robots; automated machines that can execute specific tasks with little or no human intervention and often with speed and precision.

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How To Ensure Only One Brick is Fed Into a Lego Sorting Machine at a Time?

In this video, they create a machine that can take a bunch of legos put on to a conveyor belt and, using a camera, sort them into a number of categories. I am building a (smaller) version of this, and ...
Brendan R.'s user avatar
7 votes
1 answer
565 views

How do I build this robot car?

I want to start using more LEGO Technic, but I'm not sure what the best way is to buy the parts without breaking the bank. I'd really like to make a robot like the ones shown in this video. Making ...
tomh's user avatar
  • 203
3 votes
1 answer
436 views

Robot Inventor Bluetooth not working

A while ago, I started up the Robot Inventor program and noticed the computer was not connecting. When I clicked the "Connect" button, the loading "circle" simply started spinning ...
technicguy1's user avatar
2 votes
1 answer
137 views

Is there a way to add a ultrasonic sensor on the ev3 COR3 robot?

When I built the COR3 robot I started to have some fun programming it. But then I wanted to add a ultrasonic sensor on my robot but I can't seem to find a way to place it on my robot. If you can ...
Gabriel's user avatar
  • 33
4 votes
1 answer
582 views

When using pi * distance between wheels/tracks, how do I measure distance between wheels?

I am trying to make a program that requires my 51515 to turn a specified number of degrees. I found a way to do that on the LEGO app's "Knowledge Base", but the given example was: import ...
technicguy1's user avatar
4 votes
1 answer
515 views

Is there any cross compatibility between 51515 and 31313?

I'm thinking of buying another Mindstorms set, and I already have a 31313. I don't want to spend $370 just to learn they are completely incapable of communicating with each other, so if you could tell ...
technicguy1's user avatar
2 votes
1 answer
424 views

How to make a Lego continuous conveyor belt

So I need to make a continuously working conveyor belt transporting blocks. I have seen this post, but additionally, as already said, I have to make it work continuously transporting blocks,so I have ...
Patrick's user avatar
  • 121
3 votes
1 answer
1k views

Is there a way to convert .ev3 files to .uf2 files?

I am using Lego Mindstorms EV3 Education Edition and I am wondering if there is a way to convert the default .ev3 files to .uf2 files
Meme Master's user avatar
2 votes
2 answers
629 views

Technic beam centering for beam with even length

I design stereo camera housing for robotics (3d printing). I want the housing to be able to connect to both LEGO Classic and LEGO Technic blocks. I designed 2 groups of 4x4 holes/pins on the bottom/...
Kozuch's user avatar
  • 239
3 votes
1 answer
167 views

Anyone have the control block for the hitechnic color sensors?

I'm just wondering if anyone has a copy of the control block for the hitechnic color sensor v2? I'll take a v1 if you have that because I'm desperate at this point. The downloads page for it is down ...
rpi-noob's user avatar
6 votes
3 answers
911 views

What are some good purist rotacaster / omni wheel designs?

In robotics, rotacasters or omni wheels are often very useful. It's possible to buy LEGO-compatible ones from some third parties, here's one random example: Unfortunately, LEGO has yet to make any ...
Alexander O'Mara's user avatar
4 votes
2 answers
765 views

How to make an exact 16 degree turn?

Does anyone know how to make an exact 16 degree turn with a LEGO robot?
Cyrus's user avatar
  • 41
1 vote
0 answers
80 views

Are there any bricks to make big size robots? [closed]

I found a robot called meccanoid 2XL but it's humanoid robot and I think it's hard to control it. I am looking for a robot like the pic, that stands on wheels instead of legs, and has about 150CM ...
WDR's user avatar
  • 195
5 votes
1 answer
125 views

Is there a way to buy just the robotic parts?

I apologize if this is a silly question. My kids recently went to a LEGO robotics workshop at our local science museum and LOVED it. Is there a way to buy just the robotic parts (motor, sensors, ...
Becky Brown's user avatar
3 votes
0 answers
86 views

Are there any Open-Source bricks projects for robotics?

I mean some bricks like Lego/Meccano with a community like Instructables site, those share their models and robots with others. Also the 3D models of bricks(in solidworks format for example) are free ...
WDR's user avatar
  • 195
2 votes
1 answer
560 views

Which LEGO set is best suited to build robots?

My goal is to build some educational robot kits for kids and so I'd like to know if there are any LEGO sets that let you build almost anything or can you only can build the specific model that the ...
WDR's user avatar
  • 195
2 votes
2 answers
163 views

Is LEGO mindstorms good for a robot warrior or a small size soccer robot?

I want to know if I can build a warrior or small size soccer robot with LEGO parts? If not, are there any better options?
WDR's user avatar
  • 195
1 vote
1 answer
196 views

EV3 T-Rex we build keeps toppling over on step

I'm building the standard T-Rex project from Benedettelli's book. We double checked construction and also step my block - all looks correct. Any pointers appreciated.
Suneri's user avatar
  • 11
1 vote
1 answer
989 views

A 90 degree turn with Wheel part number 56145

I'm making a program for my ev3rstorm and I want it to have a 90-degree spin turn. I use the standard part ev3rstorm wheelbase or rather, treadbase. Using the move tank block (I use that block all the ...
Hazard's user avatar
  • 123
0 votes
1 answer
105 views

NXT light sensor homework help

Read value from NXT kit using light sensor and show it in the middle of NXT screen. If measured lightness value is less than or equal to 50, right motor will stop and left motor will move with the ...
Hernan Crespo's user avatar
8 votes
1 answer
279 views

How can body segments be moved to precise angles in snake robot?

I want to create an EV3 robot similar to this: I've glanced at the mentioned papers. To me it seems that some simpler equations to govern the motors will work also. I have 9 segments, articulated by ...
Michael Verschaeve's user avatar
3 votes
2 answers
2k views

LEGO Mindstorms Motor Power

I am working on a project with a LEGO Mindstorms (RCX) motor. For this project, all I need is to spin a motor (43362, http://www.philohome.com/motors/motor.htm). I was wondering how the LEGO ...
dts's user avatar
  • 161
4 votes
2 answers
685 views

Mindstorms EV3: Patrolling a number of rooms - what are my options?

I want my Mindstorms EV3 bot to patrol a number of rooms autonomously on the same track. What are my options? line following, which requires a line and is relatively slow setting a default program ...
user8196's user avatar
4 votes
0 answers
858 views

EV3 SPIK3R Mission 2 doesn't move

So I was building Spik3r and I thought I got mission 2 completed. Wheels are turning, legs are moving but the robot just does not move. It looks like the small wheels should be moving the robot but ...
Heikki Taavettila's user avatar
6 votes
1 answer
342 views

What is this 11x6 white and dark grey motorized LEGO piece with blue buttons and a transparent blue panel?

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 ...
Shannon's user avatar
  • 61
2 votes
2 answers
384 views

RCX 2.0 Firmware downloaded successfully but "Run" does nothing

I recently was able to install RIS 2.0 for the first time since I just got a 32bit Windows 7 machine. I got the IR tower to download the firmware to the RCX 2.0 and it showed exactly the same screens ...
Ben O'Brien's user avatar
2 votes
3 answers
3k views

The Mindstorms EV3 Software crashes on OS X Yosemite 10.10.3. What do I do?

It's crashing on startup which is really irritating. When debugged with terminal it says this: Unhandled Exception: System.UnauthorizedAccessException: Access to the path is denied. [ERROR] FATAL ...
user avatar
6 votes
1 answer
773 views

Robot that builds a copy of itself

I'd like to try building a robot that can build a copy of itself. Basically, I guess that involves: having some means of navigating around (i.e. wheels, tracks, something to move on) having some ...
GreyCat's user avatar
  • 293
1 vote
1 answer
120 views

Advanced coloured lines following robot

I am trying to build a coloured lines following robot, and I would like to know what kind of sensors do I use for my robot to differentiate and detect several different coloured lines?
user3066036's user avatar
12 votes
4 answers
10k views

How to make a conveyor belt with LEGO parts?

I am making a small robot with an Arduino and Technic LEGO powered by stepper motors. I am planning on moving small rocks throughout my machine. Does anyone have an idea of what kind of Technic LEGO ...
bogen's user avatar
  • 825
0 votes
1 answer
440 views

How do I get started with Mindstorms NXT 2.0? [closed]

I need help programming a NXT 2.0 Lego Mindstorms. I want to make the robot turn, stop, go back, etc. when the color sensors see certain colors. For example when the robot sees red it stops then turns....
MHS Robotics's user avatar
6 votes
2 answers
2k views

What are the known software tools for the EV3?

The EV3 is coming in Fall/Summer of 2013 and we tons of unknowns that will come in EV3. I am curious what software EV3 will run and will older generation software run on EV3 (NXT 1.0). And my final ...
iProgrammed's user avatar
21 votes
5 answers
3k views

Useful machines built with LEGO

I am looking for examples of useful machines built with LEGO (probably Technics, NXT etc.). There are many fun project examples and proofs of concept, such as a Rubik cube solver and a Turing machine. ...
Jakob's user avatar
  • 1,278
9 votes
2 answers
3k views

How do I build a paper feeder with LEGO to transfer a single sheet of paper from a deck robustly?

I want to create an apparatus (which might be called a paper feeder) to take a still image for each paper taken from a deck of 500 sheets robustly. Robustly means that the apparatus must guarantee all ...
kiss my armpit's user avatar
4 votes
1 answer
217 views

Are there any theoretical works about possiblity of self-replication of LEGO systems?

Are there any theoretical works about possiblity of self-replication of LEGO systems? (constraints on the size etc., computer simulations) Here are some relevent links: Bartlab.org: PDF Document ...
Qbik's user avatar
  • 233
19 votes
3 answers
2k views

How would you make a good pivot-arm suspension?

I once tried to make a 4 wheeled Lego robot using a pivot arm suspension system. The robot was motorized using 2 Mindstorm (2.0) motors (one one each side). I can't find and original picture but it ...
pcantin's user avatar
  • 13.5k
10 votes
1 answer
554 views

What is the popular challenge of solving the Rubik cube as quickly as possible using LEGO bricks?

I saw videos of people participating in a race to resolve a Rubik cube as quickly as possible using Mindstorm LEGO robots. Can you provide information whether there is a competition and on who is ...
jfyelle's user avatar
  • 3,242