Questions tagged [robotic]

related to robots - machines capable of carrying out complex operations without human intervention

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1answer
60 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
6
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1answer
406 views

PC To NXT Brick via Bluetooth

We have a fully-working java programme which can connect to another computer and can send messages from this(both sides run java and we used SPP Server and Client), however when trying to connect to ...
2
votes
2answers
183 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/...
8
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1answer
250 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 ...
3
votes
1answer
80 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 ...
5
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1answer
95 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, ...
3
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0answers
61 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 ...
4
votes
2answers
311 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 ...
2
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2answers
200 views

How to make an exact 16 degree turn?

Does anyone know how to make an exact 16 degree turn with a LEGO robot?
3
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0answers
675 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 ...
2
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2answers
227 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 ...
1
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0answers
66 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 ...
2
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2answers
120 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?
2
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1answer
282 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 ...
1
vote
1answer
103 views

Trex 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.
1
vote
1answer
823 views

A 90 degree turn with 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 ...
0
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1answer
54 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 ...
3
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2answers
1k 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 ...
4
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2answers
435 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 ...
11
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4answers
8k 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 ...
2
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3answers
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 ...
1
vote
1answer
116 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?
20
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5answers
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. ...
6
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1answer
622 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 ...
6
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2answers
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 ...
0
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1answer
367 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....
9
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2answers
2k 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 ...
4
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1answer
179 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 ...
18
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3answers
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 ...
10
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1answer
510 views

What is this challenge to solve the Rubik cube as quickly as possible using LEGO bricks?

I saw videos of people participating in race to resolve a Rubik cube as quickly as possible using Mindstorm LEGO robots. Can you provide information if there is a competition, who is involved? What ...