2
votes
2answers
142 views

Find back start position?

I have a LEGO NXT robot, and after some movements I would like it to return back where it started. After some research, it looks like my best option is to revert the motors. To decode their movements ...
1
vote
2answers
270 views

Creating a native EV3B block

I'm trying to create a native block for a hardware sensor. I've got it working pretty well, but can't get it to show up in the "port view" as anything but a sound sensor. I really need the live view ...
4
votes
1answer
161 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?
3
votes
1answer
146 views

Is there a microphone that works with Mindstorms EV3?

I'm planning to program my EV3 robot to do voice chat over VOIP using ev3dev and a Debian program. Is this possible? Are there microphones known to work with EV3, and has anyone had experience using ...
2
votes
1answer
71 views

Connecting a webcam to NXT and streaming a video

is it possible to connect any webcam or modify it in such a way that the NXT controller will be able to stream a video to another computer? Iv'e seen there are special sensors for it, but I can't ...
2
votes
1answer
148 views

EV3 Rapt3r's head cable interfering with slithering

My Rapt3r is working great, except that the cable that goes from the head to the "Intelligent Brick" physically interferes with the slithering on the side on which it is plugged (port 4). Physically ...
2
votes
1answer
191 views

What's the sight of the ultrasonic sensor according to the distance of the object?

Hey I'm programming a sumobot for a first-year university Civil Engineering project. We should need the sight of the ultrasonic sensor according tot the distance of an object. For example, the sensor ...
1
vote
1answer
133 views

What do factory markings on the inside of DUPLO pieces mean?

In addition to LEGO and DUPLO names embossed inside the pieces of early DUPLO figures, there are a variety of number formats (one to three digits, some hyphenated) and in the case of 1977, the year. ...
1
vote
1answer
142 views

NXT program not running

We have multiple NXT Bricks. We can read sensor data and motor degrees from View. Some are running FW 1.31, others FW 1.28. When we try a simple 5-step NXT program, the motors will not turn. We tries ...
0
votes
1answer
29 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?
0
votes
1answer
41 views

EV3 bluetooth controller for mac

Is there a suitable EV3 controller for mac? It should be a compatible alternative from the official EV3 controller in the iOS app store or google play.
12
votes
0answers
342 views

What's the exact opacity and translucency of transparent bricks?

As answered in this question, transparent bricks are made of PC (polycarbonate) and as listed in this answer and on Brickipedia there are fourteen transparent colors: 40 Transparent (clear) 41 ...
10
votes
0answers
140 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 ...
6
votes
0answers
109 views

How can I control nxt 2.0 robot with a Wiimote in labview?

I am building a robot with Labview for LEGO Mindstorms and I have wanted to hook up the robot to move based on a Wiimote or Wii remote. However, I have not found a file to download to enable me to do ...
6
votes
0answers
451 views

Connecting to NXT Brick via Processing over Bluetooth

I am attempting to control my NXT model via the Processing programming language rather than the provided language based on LabView. When I can establish a connection over Bluetooth, this works rather ...
6
votes
0answers
196 views

PosRegEnable - How to change motor parameters?

I want to set PID parameters for a faster 'attack' when using PosRegEnablePID() on a motor. I am compiling with nbc/nxc 1.2.1 r4 mac osx fatbinary using -Z2 and -EF flags. But the compiler says: # ...
4
votes
0answers
205 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
0answers
116 views

NXT shuts down in 5 minutes

I have an NXT brick that will always shut down after 5 minutes. No, it is not the sleep timer. Documentation from the NXT Hardware SDK, page 17, states that if the ARM7 processor does not send back ...
3
votes
0answers
47 views

Accessing ARM Processor Memory Registers through NXC

Specific to the NXC (Not eXactly C) programming language. Is it possible to access the memory registers on the ARM AT91SAM7S256 processor? I'm trying to investigate the use of Timer Interrupts to ...
2
votes
0answers
317 views

Known quality control issue with 10234 Sydney Opera House?

I have just completed 10234 Sydney Opera House, with one white half-shell (Bricklink: 41749 White Wedge 8x3x2 Open Right) missing. Both the Bricklink inventory and the Lego instructions show 34 of ...
2
votes
0answers
136 views

LEGO turing machine using Rascal

I followed the instructions on LEGO Turing Machine and succeeded to build it. Next I've tried and failed to program it using NXT Mindstorm GUI. The site mentions a Rascal framework, but it doesn't ...
2
votes
0answers
321 views

RCX 1.0 downloaded firmware successfully with RIS 2.0 but does not run any program

I have installed correctly the RIS 2.0 in an old laptop running Windows XP and I successfully downloaded the firmware through the RIS 2.0 to the RCX 1.0, following the standard setup instructions. ...
1
vote
0answers
15 views

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

I've read that I can program the NXT with the EV3 software but I can't get the EV3 software to recognize my brick either through Bluetooth or USB. My NXT brick firmware is updated to 1.31 and I've ...
1
vote
0answers
495 views

API for Android or iOS connecting to EV3 by bluetooth

There is official API for Windows, WindowsPhone8 and WinRT https://legoev3.codeplex.com/ it lets you connect to EV3 brick and control it remotely from your WindowsPhone. Are there any libraries ...
1
vote
0answers
72 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?
1
vote
0answers
132 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 ...
1
vote
0answers
145 views

Linear Actuator of the boom of 42006 jams

I just built a 42006 excavator, and the Linear Actuator jams, can not be rotated. I think the too sharp angle of the u-joint at the top of the boom is the reason. Is there a workaroud?
0
votes
0answers
76 views

Where will the World First Lego League be held in 2015?

Every year First Lego League (FLL) is held in 3 different countries. I know that the world festival will be held in San Luis, but where will the other two be? Last year it was held in Germany and ...
0
votes
0answers
52 views

Parallel Direct Commands to an NXT

Is it possible to send multiple Direct Commands to an NXT brick in a quick succession, and the NXT brick will execute them as soon as it receives them which will look like they are happening in ...
0
votes
0answers
54 views

Problem in connecting the NXT brick via bluetooth

I am trying to control my NXT brick via Bluetooth but I cannot establish a connection. Although I am able to establish a Bluetooth connection from the laptop to the LEGO using a Bluetooth dongle, the ...
0
votes
0answers
39 views

Are there any additional robo center downloads for the nxt-g software?

It would be nice if there were additional entries under the animals, vehicles, machines and humanoid tabs. Supposedly there was some official LEGO web component to the software which appears to be ...
0
votes
0answers
63 views

Can Mindstorms EV3 communicate using protocol 802.15.4?

My aim is to make the robot communicate using protocol 802.15.4 through a USB dongle 802.15.4 over 6LoWPAN. The robot has to be able to get information from TelosB. I wonder whether this possibility ...
0
votes
0answers
228 views

NXT software V2.1 runtime installation error in windows

My system configuration : Windows 7 Home Premium 64-bit Service Pack 1. When I try to install NXT software v2.1, at the beginning itself I am getting the error below: Microsoft Visual C++ runtime ...