 | | Re: NXT-G using RCX items.
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(...) I have a conveter cable so I finally did some tests with NXT-G and here is what I find-- RCX motor runs in both directions, and responds to the speed settings. The touch sensor works. The light sensor measures ambient light. But the bad news (...) (18 years ago, 15-Oct-06, to lugnet.robotics.nxt)
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| | Managing Memory
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I've got 8 kids working on NXT who have been experiencing "not enough memory". So, I did a little experimenting. Every new program takes a minimum of 6K. Every Move Block takes 0.5K Imagine that! 500 bytes for a simple move block. I haven't measured (...) (18 years ago, 14-Oct-06, to lugnet.robotics.nxt)
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| | Re: NXT-G using RCX items.
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(...) Well, you need converter cables of some sort to even connect RCX sensors and motors to the NXT. Beyond that, I'm not sure; I've not tried yet, because I don't have the converter cables to try. I suspect you will need the special NXT-G (...) (18 years ago, 13-Oct-06, to lugnet.robotics.nxt)
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| | NXT-G using RCX items.
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Hello Everyone: I just read the press release regarding the LEGO Mindstorms Education NXT. There is no discount available for their software that allows me to use my RCX motors, sensors etc with the NXT-G. Do I even need their version to run RCX (...) (18 years ago, 13-Oct-06, to lugnet.robotics.nxt)
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| | Re: NXT to RCX Communications
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----- Original Message ----- From: "Brian Davis" <brdavis@iusb.edu> To: <lugnet.robotics.nxt...ugnet.com> Sent: Wednesday, October 04, 2006 10:23 PM Subject: Re: NXT to RCX Communications (...) Thanks Brian. I might as well use the time to try and (...) (18 years ago, 5-Oct-06, to lugnet.robotics.nxt)
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| | Re: NXT to RCX Communications
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(...) No. The light sensor can have the red LED either on or off - you can't set it to "20%" or something like that, and there's no way to toggle the LED fast enough to mimic or RCX-style IR message. But... You could cetainly have a program (...) (18 years ago, 5-Oct-06, to lugnet.robotics.nxt)
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| | NXT to RCX Communications
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Hello everyone: Is it possible for the NXT to send Run Program commands from the NXT to RCX via a light sensor? Here is an example: 1- The NXT Ultrasound sensor detects an object close by, triggers the NXT light sensor to light up at 20 percent (...) (18 years ago, 5-Oct-06, to lugnet.robotics.nxt)
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| | Studless building techniques
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I am working with a couple FLL teams, building with the NXT. I am having a little trouble coaching them on studless building techniques, as it is still a bit of a new concept to me as well. I'm sure I've seen presentations or how-to's on the subject (...) (18 years ago, 3-Oct-06, to lugnet.technic, lugnet.robotics.nxt, lugnet.robotics.edu)
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| | RE: Tacho Limit and Braking
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|
(...) You can do just about anything with one line of code if you count user subroutine and user macro calls as "one line". The "Rotate" macro in your example expands to four lines of code that sets up and calls a user program subroutine that is (...) (18 years ago, 2-Oct-06, to lugnet.robotics.nxt)
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| | Re: Tacho Limit and Braking
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(...) This made sense, until I read this... In lugnet.robotics.nxt, John Hansen wrote: (...) I had to go back and re-read this to understand one is talking about the NXT firmware, and the other is talking about NBC. If I read it correctly, it means: (...) (18 years ago, 2-Oct-06, to lugnet.robotics.nxt)
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| | Re: Help with NXT-G programming.
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(...) That's just... weird. I've never managed to get something like that. The sequence beam seems to be pinned to the lower edge of the Loop structure, so that even if I make the loop wider, I still can't get to the blind end of the sequence beam. (...) (18 years ago, 2-Oct-06, to lugnet.robotics.nxt)
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| | Re: Tacho Limit and Braking
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|
(...) This is incorrect. There is no "setout" opcode in RobotC. RobotC uses a proprietary commercial alternate firmware with a completely different set of opcodes and virtual machine functionality than the standard NXT firmware. Unfortunately, the (...) (18 years ago, 2-Oct-06, to lugnet.robotics.nxt)
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| |
| | Help with NXT-G programming.
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|
Hello, I got my Mindstorm NXT set a few weeks ago. Have built and programmed all the modells that was in the program that came with the set. And now started to make my own robots with the NXT. The NXT-G program looks great and is easy to understand (...) (18 years ago, 2-Oct-06, to lugnet.robotics.nxt)
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| | RE: Tacho Limit and Braking
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|
If you want to try something a little different, use RobotC to do this. There are several advantages to this: * It can be done with one "setout" opcode. * The RobotC PID algorithm for this type of movement is different than the NXT-G (...) (18 years ago, 2-Oct-06, to lugnet.robotics.nxt)
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| | Re: Tacho Limit and Braking
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|
(...) The NXT firmware does not support a single operation which has the motor run to a specific tachometer limit and then brake. The only way to do what you would like to do involves several operations. But you can wrap it all up into a reusable (...) (18 years ago, 2-Oct-06, to lugnet.robotics.nxt)
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| | Tacho Limit and Braking
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I started playing with NBC, and wanted to run the motor until it hits the tachometer limit, and then brake. I have been unable to make this happend with one setout opcode. Is it possible? Is it possible to make the opcode wait until the tacho limit (...) (18 years ago, 1-Oct-06, to lugnet.robotics.nxt)
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| | Program with Java using iCommand 0.4
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|
The latest version of iCommand is out. It's not quite leJOS but it's the closest thing out there until we get into leJOS development. New features: - I2CSensor and UltrasonicSensor support. - Changed API so it duplicates architecture of leJOS API (...) (18 years ago, 23-Sep-06, to lugnet.robotics.nxt)
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| | Danny's Mindstorms new domain
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Hi all! I wish to invite you to update your links: my new (and only) page is now at (URL) you for your attention. Danny (18 years ago, 23-Sep-06, to lugnet.robotics.nxt)
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| | NXT - TiltBot - test of Techno-Stuff Tilt / Accelleration Sensor
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All, I created a NXT bot to test the Techno-Stuff tilt / accelleration sensor. Pics and details here: (URL) (18 years ago, 23-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Johnny 5
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Instructions may come out in a book next year. I'll soon release some new software for JohnNXT. Cheers, Danny (18 years ago, 19-Sep-06, to lugnet.robotics.nxt)
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| | Re: NXT software's "My Portal" tab now actually does something
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|
(...) Nope, it's not that, I'm connected all the time. I'm guessing the Windows Firewall, but I've opened that up (I think). (18 years ago, 18-Sep-06, to lugnet.robotics.nxt)
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| | Re: Johnny 5
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(...) He has recently posted a parts list, which is a start: (URL) (18 years ago, 18-Sep-06, to lugnet.robotics, lugnet.robotics.nxt, FTX)
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| | Re: NXT software's "My Portal" tab now actually does something
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|
You have to be connected to the internet for it to work. The panel is basically a tiny web browser (it uses Mozilla's Gecko rendering engine). (18 years ago, 18-Sep-06, to lugnet.robotics.nxt)
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| | Re: NXT software's "My Portal" tab now actually does something
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|
I can't get it to connect at all, I get "Not Connected" "Jordan Bradford" <jordan_bradfordREMO...tmail.com> wrote in message news:J5nurA.7K8@lugnet.com... (...) (18 years ago, 17-Sep-06, to lugnet.robotics.nxt)
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| | NXT software's "My Portal" tab now actually does something
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I don't know if anyone else has noticed this, but the "My Portal" tab in the NXT software now actually has some content. The first is a link to the Classic Cuckoo Clock and SoundBot building instructions on the Mindstorms website, and there are some (...) (18 years ago, 16-Sep-06, to lugnet.robotics, lugnet.robotics.nxt, FTX)
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| |
| | Re: Gnah I'm afraid I've discovered a new bug :(
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(...) My faith in the company is undisturbed. Quick call to the sales dept and a new NXT is in the mail. They kindly asked me to return the broken one, using their free of charge mailing service. Note that they didn't say: "Return the unit, let us (...) (18 years ago, 14-Sep-06, to lugnet.robotics.nxt)
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| | Sony-Ericsson Z530i and other BT, Cam and Java phones
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As far as I've seen in the SDK's released by Sony-Ericsson Java programs do have full access to BT and camera. I don't think the phone has enough hardware to perform any image recognition more than very basic. But I chose that model since it has a (...) (18 years ago, 13-Sep-06, to lugnet.robotics.nxt)
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| | Re: Gnah I'm afraid I've discovered a new bug :(
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|
Replying to myself: I've been told by support to contact sales. Which is fair, not their fault that I contacted the wrong source. When it comes to Sony-Ericsson Z530i I'll create a new thread so we can discuss that. (...) (18 years ago, 13-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Flash Write Cycles
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(...) I am not 100% sure but I am pretty sure based on a number of discussions that I have been involved with during the MUP2/MDP. To the best of my knowledge a clicking brick (however it got into that state) is a brick running SAM-BA in flash with (...) (18 years ago, 13-Sep-06, to lugnet.robotics.nxt)
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| | Re: Gnah I'm afraid I've discovered a new bug :(
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|
(...) Yah well, that's GPS for you. Even high-budget GPS's don't work very well indoors, if at all. (18 years ago, 13-Sep-06, to lugnet.robotics.nxt)
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| |
| | Details of the Bluetooth messaging protocol?
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|
Can someone clarify the details of the Bluetooth messaging protocol? The documentation is quite confusing. (There is documentation for this in the Executable File Specificationn and in the Bluetooth develop kit document, as well as some in the NXT-G (...) (18 years ago, 13-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Flash Write Cycles
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(...) flash Are you sure of this John? It seems like the reset button would be for dire circumstances and would do something different than the firmware boot mode. The spec says this about SAMBA loading: "To enter SAM-BA Boot Recovery, the TST pin (...) (18 years ago, 13-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Video from a Camera Cellphone into the NXT
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|
In article <003701c6d6bc$fe18c6...kdesktop>, Dick Swan <dickswan@sbcglobal.net> writes (...) Okay. (...) I was lacking context, and I think you are looking for a simple answer that is not yet available. (...) Interesting, I have not met any of this (...) (18 years ago, 13-Sep-06, to lugnet.robotics.nxt)
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| | RE: Video from a Camera Cellphone into the NXT
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Topic was formerly named "Gnah I'm afraid I've discovered a new bug". I've put a more relevant subject on it. This is in response to a reply from Tony Naggs. This is a good answer but not to the question I wanted answered. The currently available (...) (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | Re: Gnah I'm afraid I've discovered a new bug :(
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|
In article <001501c6d613$4aece6...kdesktop>, Dick Swan <dickswan@sbcglobal.net> writes (...) There are quite a number of different software platforms, versions and variants for 'feature phones' and 'smart' phones. For Java a lot of APIs are (...) (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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(...) [...] (...) According to what I have read, putting the AT91SAM7S processor in system recovery mode (i.e., by resetting it via the hardware reset button or by programmatically putting it into firmware boot mode) loads SAM-BA into flash and when (...) (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | RE: Flash Write Cycles
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(...) I guess it depends on which way they fail? Do they fail in locked mode or in unlocked mode? If, as would be good design, they fail to permanently locked, I'd guess nobody is interested in trying. What nobody has mentioned yet is the (...) (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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|
(...) Whether you reset the brick or just run the download firmware routine in the LEGO Mindstorms NXT software or in RobotC or in NBC/BricxCC you've put the brick in SAMBA mode (clicking brick mode) and the lock bits have been cycled. But I have (...) (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | RE: Gnah I'm afraid I've discovered a new bug :(
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|
Anyone know if user applications (Java?) running on a camera phone have access to a recent frame buffer from the on-board camera? The objective of course is to perform image recognition on either the camera or the cellphone for the NXT to make (...) (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | Re: Gnah I'm afraid I've discovered a new bug :(
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(...) Upgraded, and changed to fresh batteries twice, I sure hope it isn't but is feels very much like a hardware failure to me :( On the other hand I can report that I managed to get a low budget GPS to talk to my NXT. The bad news is that it works (...) (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | Re: Gnah I'm afraid I've discovered a new bug :(
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|
(...) OK, that's just... weird. Are you using the straight-off-the-CD software, or have you upgraded with the "no clicking" patch? (18 years ago, 12-Sep-06, to lugnet.robotics.nxt)
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| | Gnah I'm afraid I've discovered a new bug :(
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|
My precious decided to die one night. When I tried to start it one morning it was totally dead, nothing could revive it. But since it was saturday and I had stuff to do I left it alone. Then several hours later it started to 'click' as described by (...) (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| | Re: NXT in London
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(...) Thanks, Tony, this information is great. I will check it out. Patrick (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| | Re: Bluetooth Commands via Perl
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|
Good luck. I did manage to get ruby-nxt working in windows, but I had to run it through cygwin to be able to compile the serial port module: (...) (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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|
(...) As I understand it, the lock bits are only touched if SAMBA mode is entered, which is done when the reset button is pressed for more than about three seconds. At that point, the ARM erases the bottom two sectors and installs the SAMBA firmware (...) (18 years ago, 11-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Flash Write Cycles
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|
"Sivan Toledo" <stoledo@tau.ac.il> wrote in message news:J5DMMp.Bs5@lugnet.com... (...) firmware (...) called (...) True, you can't level the firmware - only file systems can be wear leveled. I understand that there has been discussion concerning (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Bluetooth Commands via Perl
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|
"Tony Buser" <tbuser@gmail.com> wrote in message news:b74cdea06090916...ail.com... (...) That was written for Linux, but hopefully, it will work on Windows as well. Dave (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | RE: Flash Write Cycles
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|
(...) Don't forget that the education market is also a large portion of the Mindstorms market. Lifetime for education is more line ten years?? And depending on environment, these could be heavy use applications. LEGO has also been very generous in (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Flash Write Cycles
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|
(...) One probable reason that the NXT does not do any wear leveling is that it executes instructions directly from flash (the instructions in the firmware itself), which is memory mapped. This requires that these instructions are contiguous, which (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Flash Write Cycles
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|
In article <J5C97r.BBF@lugnet.com>, David <dww.robotics@gmail.com> writes (...) This is the guaranteed minimum number, with higher voltages and at higher temperatures than you are likely to use the NXT at. FLASH memory is a pretty mature technology (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: NXT in London
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|
In article <J5CrsD.53w@lugnet.com>, Patrick Levy <patrick@omiccron.com.br> writes (...) That is the Lego Company's recommended price. Hamleys sell to many foreign visitors so they can probably help with advice on how to reclaim the VAT (17.5% retail (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| |
| | RE: Flash Write Cycles
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|
(...) I researched this topic about eight months ago. I no longer worry about it. I must admit I didn't know about the "lock-bits" specification and was concerned only with the "flash rewrite specification". I have also had other conversations on (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Flash Write Cycles
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|
(...) When downloading a program to the NXT using NBC if there is a file with the same name on the NXT already it is first deleted. Then a new file is created and written using the same filename. I don't know whether that means the firmware will (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| |
| | NXT in London
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|
Somebody can point me the best (cheapest) shop to buy the NXT in London? I will be there by october, and I only found it for £179,99 GBP in hamleys. (ouch!). TIA Patrick Levy São Paulo, Brazil (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Flash Write Cycles
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|
(...) I don't; John Hansen might. While Flash memory does have a limited number of read/write cycles, it appears that the stated limit is conservative, by a large margin... although some of us have thought about a "test to failure" trial, I've not (...) (18 years ago, 10-Sep-06, to lugnet.robotics.nxt)
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| | Re: Bluetooth Commands via Perl
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|
(...) Although I haven't tried it, someone has created a perl module for sending commands here: (URL) haven't tried it because I'm working on a ruby module :) (URL) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| |
| | Flash Write Cycles
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|
Does anyone know how the NXT firmware handles writing program files into flash? If you re-flash a program with the same name, does it first erase the sectors that the old program was located in and then re-flash these sectors with the new program? (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Light sensor sampling freq?
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|
(...) Hmm, so speed isn't the issue, the issue is that the 'laser' must hit the detector head on. But luckily that was solved by inserting a thin slice of paper inside the 2x1 red transpararent brick and moving it tone stud in front of the sensor. (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| |
| | RE: Light sensor sampling freq?
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|
Standard Lego firmware samples every 3 msec. BricOS is much faster. I believe it is faster than once per second. RobotC on NXT is programmable to be 0.5 msec scan, 1 msec, 2 msec, ... up to 255 msec. But remember the readings are not persistent. If (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| | Light sensor sampling freq?
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|
I'm working on a little nav idea that my robot can find my 'base' which is sweping a bright red led 'laser' over the area. I have to admit that I ventured into the Xacto and crazy glue area by using a 'laser' pointer and glueing four tiny mirrors (...) (18 years ago, 9-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: CBS (Clicking Brick Syndrome) Patch availible
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|
(...) Problem solved! I was worried installing the new driver v1.02 (linked earlier in this thread, because my firmware version said 1.03. But John Hansen confirmed that they are 2 different things, so I installed the update and voila! It might be a (...) (18 years ago, 8-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: CBS (Clicking Brick Syndrome) Patch availible
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|
(...) Well I have a retail set, and decided to try downloading the firmware via USB from the LEGO software, and you guessed it, I got clicking. So I pressed the reset button as they suggest, and tried downloading it again, the progress bars all (...) (18 years ago, 8-Sep-06, to lugnet.robotics.nxt)
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| |
| | NQC Templates
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|
I am helping John by taking on the task of coming up with some micros for NQC template. If anyone wants to join the effort or already has some that you would like to share with other uses of NQC, e-mail me at lsrgroup@etcmail.com. Thanks Lamar (...) (18 years ago, 7-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Scorpion Plans
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|
(...) The graphic files (if you installed in the "standard" location) are located at: C:\Program Files\LEGO MINDSTORMS NXT\engine\EditorVIs\Academy Content\activities\a...1\bi\*.jpg (plus ..\02\bi\*.jpg, ..\03\bi\*.jpg, and ..\04\bi\*.jpg) You could (...) (18 years ago, 7-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: Bluetooth Commands via Perl
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|
(...) I guess no one is using Perl to communicate with the NXT over Bluetooth. Or everyone is busy building bots. I found something that seems to work reliably on my HP Laptop running Windows 2000. It has a built-in CSR Bluetooth module that is 1.1 (...) (18 years ago, 6-Sep-06, to lugnet.robotics.nxt)
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| |
| | Scorpion Plans
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|
Are the plans for the NXT Scorpion available online or anywhere in a printed or printable form? I'd much rather build it from paper plans than from my screen. Thanks, -Jon Gilchrist (18 years ago, 6-Sep-06, to lugnet.robotics.nxt)
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| |
| | Bluetooth COM Ports
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|
Hi, I noticed there are a lot of COM ports that the Lego Software set up with my computer. (Control Panel, System, Hardware Tab, Device Manager, Ports (COM and LPT). I tried uninstalling all of these and then ran the Lego Software again, and it (...) (18 years ago, 4-Sep-06, to lugnet.robotics.nxt)
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| | Bluetooth Commands via Perl
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|
Has anyone successfully been able to send BT commands to the NXT using Perl on Windows and get a response? I've been trying to send the Get Firmware command and have not gotten a successful response. Here is a short script: $data = (...) (18 years ago, 4-Sep-06, to lugnet.robotics.nxt)
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| |
| | Re: What to do in route to BF...
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|
(...) So you give interviews while driving through mountains? Talk about multi-tasking... (...) broken. Overall, it's a pretty nice article. I'd love to be a fly on the wall when folks like this open up a NXT. (18 years ago, 31-Aug-06, to lugnet.robotics, lugnet.events.brickfest, lugnet.robotics.nxt, lugnet.mediawatch)
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| | What to do in route to BF...
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Wanna know what I did on my way to BrickFest? (URL) (18 years ago, 31-Aug-06, to lugnet.robotics, lugnet.events.brickfest, lugnet.robotics.nxt, lugnet.mediawatch)
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| |
| | Re: NXT and Phone Compatibility
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|
In article <J4J9IK.H27@lugnet.com>, David J. Perdue <david@davidjperdue.com> wrote (...) I shall be writing some tools to run on phones and communicate over Bluetooth. I am in the middle of a writing project at the moment, so this may be a month or (...) (18 years ago, 27-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT and Phone Compatibility
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|
(...) Okay, thanks for the information Tony! - David (18 years ago, 25-Aug-06, to lugnet.robotics.nxt)
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| |
| | Re: NXT and Phone Compatibility
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In article <J4GvJt.oDA@lugnet.com>, David J. Perdue <david@davidjperdue.com> wrote (...) The phone must allow use of Bluetooth for devices beyond just hands free / headsets. The phone must support installable software of some form, (and the operator (...) (18 years ago, 23-Aug-06, to lugnet.robotics.nxt)
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| | NXT and Phone Compatibility
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|
Does anyone know the technical requirements for a cell phone that will be communicating with an NXT? That information is not up yet on the MindStorms Bluetooth webpage. Will most phones with Bluetooth capability work with the NXT? Thanks, David (18 years ago, 23-Aug-06, to lugnet.robotics.nxt)
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| |
| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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|
(...) I meant busy in the context of the other subthread in this thread, in which people proposed hacking a way around the master-slave restrictions. But still, that's good news, so we'll have to think of some stuff for the robots to do that will be (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt)
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| |
| | Re: Severe Case of Alkaline Battery Leakage
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|
(...) Too late for today, but I'll test with a multi-meter tomorrow. First, I'll have to ask the kids which NXT it was ... senior moments, y'know. I grew up with zinc-carbon batteries, which leaked as well but were/are relatively environmentally (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt)
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| |
| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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|
(...) Jordan, Sorry to tell you this, but getting NXTs to talk to each other isn't going to take very long. Of course, figuring out what to say may take a bit. People should be able to bring almost any NXT robot, and we'll be able to get them to (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt)
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| |
| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) I can loan out an iBook with BT - and it has the NXT retail software. Joe Meno Event Coordinator (18 years ago, 22-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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The NXT Robot Swarm has been scheduled for Saturday at 12:30 in Junior Ballroom 3. It seems the goal of this first event is to get some basic BT communication working, and if there's time, actually try a swarm-like experiment. If anything else, it (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: Severe Case of Alkaline Battery Leakage
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(...) This may also indicate a short. It may be prudent to take a multimeter across the battery terminals in the battery box on the NXT before putting any fresh batteries in. If that is the case, I would strongly recommend returning the brick. (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt)
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| | Severe Case of Alkaline Battery Leakage
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I've got Duracell Coppertops on 10 NXTs I use in class. I've just experienced a nasty case of battery leakage. Good thing it leaked on the cover rather than on the electronics. Good thing the student, an 11 year old, brought the leakage to my (...) (18 years ago, 22-Aug-06, to lugnet.robotics.nxt)
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| | NeXTTool fix & NBC update
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I have updated the zips for BrickTool and NeXTTool to fix a small problem with downloading .ric files to the NXT brick. I also uploaded a new beta for NBC which implements a pseudo wait opcode (which was dropped from the firmware at some point). If (...) (18 years ago, 21-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT avaliable in London
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(...) Went a bit mad, bought three - two as spares to sell when I get back. (18 years ago, 17-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT avaliable in London
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(...) Going to pick up a set tomorrow whilst I'm here in the US, I hadn't realised it wasn't out in the shops in the UK yet! (18 years ago, 17-Aug-06, to lugnet.robotics.nxt)
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| | New NXT Utilities
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I have posted a couple new utilities for the NXT on my BricxCC website. One (MidiBatch) is a batch conversion utility for converting MIDI files into NXT Melody (.rmd) files. NXT Melody files can be played via NXT-G simply by renaming them as NXT (...) (18 years ago, 16-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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In article <J3y0B4.FM0@lugnet.com>, Brian Davis <brdavis@iusb.edu> wrote (...) I shall have PC software to do this, and probably others will have similar tools before I finish. (...) I believe 7 is the number of connections specified in the (...) (18 years ago, 15-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Motor Encoder Accuracy and Dead Reckoning
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(...) ... (...) Yes. Very easily. I took my floor cleaner robot, Rosie: (URL) a two-block NXT-G program (in a loop): (URL) created a robot that I think has the accuracy of "Peeves", as seen here: (URL) appears to return within a couple cm each time. (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) My problems with this solution are two-fold. First, NXT-G currently can't send anything back to the PC, as it's not running anything to get the NXT-G message structure (yes, folks could write this... almost certainly will. But likely not me). (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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Here's an idea of how to get more than 3 NXTs connected via Bluetooth (BT). It involves using a PC as a "relay point". I think standards allow up to seven simultaneous connections per BT device. The limitation to three connections on the NXT may be (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Motor Encoder Accuracy and Dead Reckoning
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(...) I've played with it a good bit. It seems to be extremely accurate, in that one motor will slavishly follow the other - you can do demos like set a Move block to drive forward 10 rotations, and while it's trying to do that pick up the robot and (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Motor Encoder Accuracy and Dead Reckoning
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Dick, the article you referenced with the PID controller is excellent. I spent a lot of time trying to do a straight line with an RCX model a few years ago, but with a different approach: It was track-driven and the drive shaft extension on each (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | NXT Motor Encoder Accuracy and Dead Reckoning
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Has anyone done any experiments on the accuracy of the NXT motor "move to" block? If so, can they post their results or impressions? I know NXT supports PID calculations to synchronize two motors and run in a straight line. Can you use this to drive (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) I played around with this a little bit, trying to confirm what I've been told. It is possible to have an NXT connect as either a master or a slave, but not both at the same time. I'm sure this is true. Here's what I did: I took three NXTs with (...) (18 years ago, 13-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) As I was working on my ruby-nxt module, I managed to get the nxt to connect to my laptop as both a master and a slave. On my laptop (a MacBookPro) I created an incoming bluetooth serial port and an outgoing serial port on the DEV-B device (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) Jordan, I think swarming would be very fun to explore, but, for me, there isn't enough time before BF. Here's something you could play around with before BF: (URL) by getting your robot to follow the line on the test pad. To answer your (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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It's good that people are interested! With the RCX couldn't you just have a robot broadcast a message to anything that could see the IR signal and was waiting for specific messages to arrive? Can a similar thing be done with BT? Would we be better (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: Spike Building Guide Typo
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(...) The same three girls got confused by the programming instructions for Spike "Reactions". They missed the proper placement of the second switch block within the primary switch block within the loop block in frame 8. Confused? So was I. They saw (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt)
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| | New Sensors and NI Week
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You may be interested in reading my recent "trip report" from attendance at National Instruments annual sales conference ("NI Week"). It's posted on (URL) highlights of this blog entry include: 1. A first look at the newly announced "Build a Block" (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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(...) The problem (I think; somebody want to prove me wrong?) is that the "master" NXT can send messages to at most three "slave" NXTs, but the "slaves" can not then act as BT masters to still more units. In other words, it seems very very easy to (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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| | Re: NXT Robot Swarm at BrickFest -- featuring Bluetooth
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The spec says that at most three other Bluetooth units may be connected to each NXT unit for any given program, but with proper setup one unit could act as a message-passing server for all the others in a swarm, or a simple broadcast relay protocol (...) (18 years ago, 11-Aug-06, to lugnet.robotics.nxt, FTX)
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