 | | Re: super cheap tilt sensor?
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|
"Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3CEAAE66.783CD4...ail.net... (...) rotations (...) Ok... I didn't have any rotation sensors - but now I've bought two from bricklink - that is probably cheaper and easier than buying (...) (23 years ago, 22-May-02, to lugnet.robotics)
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| | Re: NQC "No reply from RCX" Help Please
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(...) Can you type "nqc" and check to see what version number it prints out? I've double-checked the source code, and it should say "Could not open serial port or USB device". Is it possible there are multiple versions of NQC and your command path (...) (23 years ago, 22-May-02, to lugnet.robotics)
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| | Re: super cheap tilt sensor?
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|
(...) It somewhat depends on how rapidly the tilt can change - and whether you intend to try to keep the robot level or just to know how much it's tilted by. For relatively slow rotation speeds, you can use a pendulum with a rotation sensor at the (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | RE: super cheap tilt sensor?
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Anybody remember scaleictric controllers? They had a copper coil to control the speed of the cars, as the trigger was pressed it would move the bar(in power) thru the coil and voltage would increase. This could be an easy and safe way! Rob (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: Designing a bipedal robot leg
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(...) links (...) up. I used that in my beginning research on what has been done with Lego legs. :D I actually was going to it Friday, but Geocities was down all weekend. Saw it yesterday though. (...) (URL) built that leg over the weekend too, but (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | multi-robot communication
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|
Hi Robolab 2.5 friends, I posted an update to the recent page (URL) There was still a small bug in one file. But I also would like to announce that the original Robolab 2.5 Fill_remote_container.vi has a bad bug. In fact the transmission does not (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | LUGNET robotic FAQ?
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Hi all. Suz just sent me a request for an addition to the LUGNET FAQ, which I added here: (URL) in general, the 'Robotics' section of the FAQ is pretty sparse. Since there are so many resources out there listed on the robotics home page: (URL) well (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: Designing a bipedal robot leg
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Hi Andy, 2 links for ya: (URL) - my collection of links to Lego Bipeds on the web. Although it seems many technicques have been tried succesfully, there are new ways coming out constantly. I try to keep up. For bipedal legs, try Leo's Lego: (URL) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: Pneumatic Control
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(...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Announcing a pbForth emulator
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I started this project because I like pbForth, but having no previous experience about coding in Forth I felt the need of a comfortable environment where to test and debug my programs. I know that a good factored Forth code needs little if any (...) (23 years ago, 21-May-02, to lugnet.robotics.rcx.pbforth, lugnet.robotics.rcx)
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| | RE: super cheap tilt sensor?
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|
How about using an free-moving arm in a plane parallel to the "floor"? (i.e. - like an analog wall clock placed face-up on a table) If the arm had a some weight and a wheel on one end and a shaft for a fulcrum on the other end, the position of the (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: super cheap tilt sensor?
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(...) Perhaps you want to take a look at this: (URL) Till (23 years ago, 21-May-02, to lugnet.robotics)
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| | super cheap tilt sensor?
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I was wondering if anyone knew of any extremely cheap and easy way of making a tilt sensor - that preferably doesn't involve transistors, etc. The best I can come up with are some mercury tilt switches with some resistors - so that a single input (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: remote control
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(...) If you know someone with a Palm device, you can play around with an emulation of the lego remote control like e.g. RMover or my PBrickLib ((URL) Till (23 years ago, 21-May-02, to lugnet.robotics)
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| | RE: remote control
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The 3 buttons marked [1], [2] and [3] send the respective Message() i.e. When pressing button [1] it sends a Message(1) and so forth up to button [3] that sends a Message(3). The [A], [B] and [C] mimic the function possible on the RCX itself, by (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Re: main() not defined?
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|
"Brian Smither" <bsmitherINVALID@INV...tlink.net> : (...) Sorry for that. I have typed all the code used in the book into BricxCC, and every program or code snippet has been compiled and checked before being pasted into the book. However, seems (...) (23 years ago, 21-May-02, to lugnet.robotics.rcx.nqc)
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| | Re: Powering motors from the mains
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|
The problem I see is that you don't have anything that is regulating the outtake from the motor so you may burn of the thin threads inside. (...) (23 years ago, 21-May-02, to lugnet.technic, lugnet.robotics)
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| | Microscout and IR
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I was reading stuff about the Microscout that said it's light sensor would not pick up IR light; however, I decided to try it out for myself. Using mode 3 (as the easiest one to check), I started it running, and then pointed the remote from my DVD (...) (23 years ago, 21-May-02, to lugnet.robotics.microscout)
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| | Re: main() not defined?
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Thank you, kind sir, for that small but important lesson in C programming. That was the problem. (And, for everyone's information - FEI - Ferrari's book also has Main() capitalized.) Trevyn Watson <4tee2@rogers.com> wrote in (...) (23 years ago, 21-May-02, to lugnet.robotics.rcx.nqc)
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| | Re: main() not defined?
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(...) The code on page 107 has "main()" capitalized (i.e., "Main()") and it shouldn't. The error I get is "task 'main' not defined". I'm relatively certain it is a capitalization problem. John Hansen (URL) (23 years ago, 21-May-02, to lugnet.robotics.rcx.nqc)
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| | Pneumatic Control
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Hello, As a new member to Lugnet and to the RCX I am looking for some information on how to control pneumatic circuits using the RCX. I do not want to try modifying any brick or buying non-Lego pieces. Are there any good web sites on controlling (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: remote control
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(...) Wow! So it does! I had no idea. It even sends different directions with the C-up and C-down buttons. You learn something new *every* day! ---...--- Steve Baker ---...--- Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com> URLs : (8 URLs) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: remote control
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(...) The C button causes the Scout to send a VLL 'motor on' command to the microscout. -Rob. (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: main() not defined?
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|
Did you capitalise "Main"? It doesnt seem to work if you do. NQC is case sensitive, just like C. Trevyn. (...) (23 years ago, 21-May-02, to lugnet.robotics.rcx.nqc)
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| | LegOS, lnpd, and networking
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It seems to me that a lot of the discussion lately has been on networking multiple IR (infrared) clients using legOS. Is the IR tower using an ID? This would identify messages from the IR vs an RCX. Also could the addressing be extended to allow IP (...) (23 years ago, 21-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Designing a bipedal robot leg
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|
My comments are interspersed, with no delimeters. I hate OE. :P ----- Original Message ----- From: "PeterBalch" <PeterBalch@compuserve.com> Cc: "[unknown]" <lego-robotics@crynwr.com> Sent: Monday, May 20, 2002 5:27 PM Subject: Designing a bipedal (...) (23 years ago, 21-May-02, to lugnet.robotics)
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| | Re: remote control
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|
(...) It also works with the Scout - except that A & B drive the motors and the C buttons turn on the red LED. I havn't quite figured out what the P1..P5 buttons do - they evidently activate some of the built-in functionality - but I can't be (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Re: Multi-robot communication
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|
(...) Thanks very much Jürgen. Error-free typewriting seems to be a more difficult art than I thought. Claude (23 years ago, 20-May-02, to lugnet.robotics)
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| | Designing a bipedal robot leg
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|
Andy (...) Would (...) Both. Many years ago, in the days before RCXs, I constructed a few walking bipeds with knees. I found the problem with swinging a large weight around to maintain balance was that the momentum of the weight often toppled the (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Setting LNP host address
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I've experimented with a couple of choices which were relatively easy to implement. Let me know if we should keep any these: 1. You can choose to set the host address at build time with a command-line option to make. Example: make LNP_HOSTADDR=2 (...) (23 years ago, 20-May-02, to lugnet.robotics.rcx.legos)
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| | main() not defined?
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I get this error - "main() not defined" - when compiling. The code is copied straight from the Ferrari book. While C is the language of my choice, the line of code isn't so obtuse as to hide errors from me. So probably there is some other requisite (...) (23 years ago, 20-May-02, to lugnet.robotics.rcx.nqc)
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| |
| | Re: remote control
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|
The buttons "1", "2" & "3" send a IR message to the RCX. The RCX must be running a program that will respond to one or more of those messages. The A, B, C buttons will activate the RCX outputs forward or reverse. This requires only the installed (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Re: Powering motors from the mains
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|
(...) One other thought here (and I'm not sure how "good" it is for the motors and I know that efficiency is not the best) is that you will note if you connect two motors together with the typical electrical connection wire (with no RCX in the (...) (23 years ago, 20-May-02, to lugnet.technic, lugnet.robotics)
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| | lnpd and mandrake 8.2
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|
Hi, I have install the last legOS and have install lnpd to. But i have a problem when i run an applcation lnptest for example : it don't work.... Here is the problem "lnp_init: Network is unreachable". I run lnpd with the command "lnpd --nolock (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Re: NQC "No reply from RCX" Help Please
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|
(...) I'm about to go ahead and wipe the laptop hard drive and just reinstall WinXP and see if I can get everything working from a clean install. I've done a LOT of things on this lap top and had quite a few USB devices installed... -Jeff McClain (23 years ago, 20-May-02, to lugnet.robotics)
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| |
| | Re: NQC "No reply from RCX" Help Please
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|
(...) It definately said "could not open serial port" (I typed it in quotes even and copied it directly from the program). The NQC version is the latest off your page (2.4_r2). And I was using the -SUSB (I'll have to go back and double check that I (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Re: Powering motors from the mains
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|
I've got (URL) with a AC/DC-plug. Works fine for me to power 9V motors. /Pehter (...) (23 years ago, 20-May-02, to lugnet.technic, lugnet.robotics)
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| |
| | Re: Serial cable for Dacta Interface 70909?
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|
(...) Thanks! I'll fix that when I go back to work tomorrow (today - monday - is holiday here in Sweden, so I have not had a chance to get the stuff for making my own cable yet). I got it working though, by loose wires connecting female <--> female. (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | remote control
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|
I have a couple of questions about the remote control that comes with the Ultimate Accessory Kit. I am assuming it is the same one that can be purchased on its own (#9738). At (URL) there is a jpeg image of the remote control that indicates there (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| |
| | lets drop exec
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I'd like to make a suggestion and see what everyone thinks. I'd like us to drop our current thread interface (exec/kill) in favor of a pthead interface. Since theading entered legOS I've wondered why the exec style was adopted, the functionality of (...) (23 years ago, 20-May-02, to lugnet.robotics.rcx.legos)
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| |
| | colibri - an alternative RCX RTOS
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Hi all, This might not be the right place to announce new lego-related software, but I thought some of you might be interested. colibri is a free RTOS which currently runs on the RCX. One cool hardware-related thing about colibri is that the LCD (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| |
| | Re: NQC "No reply from RCX" Help Please
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|
(...) <snip> (...) The most likely thing I can think of is some program is running that is holding open the USB Tower port. I think Jeff told me via e-mail that he is using the latest release of BricxCC/NQC. A less likely alternative would be a (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | lnpd and mandrake 8.2
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|
Hi, I have install the last legOS and have install lnpd to. But i have a problem when i run an applcation lnptest for example : it don't work.... Here is the problem "lnp_init: Network is unreachable". I run lnpd with the command "lnpd --nolock (...) (23 years ago, 20-May-02, to lugnet.robotics, lugnet.robotics.rcx.legos)
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| |
| | Re: Multi-robot communication
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|
(...) (URL) protocol is at (URL) Jürgen Stuber <stuber@loria.fr> (URL) (23 years ago, 20-May-02, to lugnet.robotics)
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| |
| | Re: Serial cable for Dacta Interface 70909?
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|
(...) a (...) cable (...) Hi Anders The standard RIS Tower cable works. You just need a gender changer to make it male at one side. I made a dedicated cable from a standard modem cable, changing a few connections. You find the cable wiring of the (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Multi-robot communication
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|
Hi Robolab 2.5 advanced users, Have a look at (URL) where I posted a simple multi-robot communication-system developped on the base of LEGO standard firmware 2.0. Imagine you have several RCXs (RCX-1 .. RCX-n) active in a project. It is now possible (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| |
| | Re: NQC "No reply from RCX" Help Please
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|
(...) My first guess on this problem is that the firmware is no longer loaded on the RCX. Check the LCD display - if it doesn't show 5 digits (e.g. "00.00 1") then the firmware isn't installed. If you can locate the firmware file (typically called (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | new patch to modify LNP ID with util/dll
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|
I've posted a patch at sourceforge which allows you to modify the RCX's LNP id using the util/dll program. This should make life easier for those of us using multiple RCXs and LNP. This patch applies to the current CVS head, post 0.2.6, though it (...) (23 years ago, 20-May-02, to lugnet.robotics.rcx.legos)
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| |
| | Re: NQC "No reply from RCX" Help Please
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|
(...) Well, I'm having a similar problem, but in my case, NQC and bricxcc just don't even ever see the brick. I have firmware installed, and the Lego RIS 2.0 software works and communicates perfectly with the brick (little green light on the USB (...) (23 years ago, 20-May-02, to lugnet.robotics)
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| | Re: Infra-Red
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|
(...) Does it work with Windows XP (the USB->Serial adapter and the 1.5 Tower)? I've had 2 USB->Serial port adapters not work under XP now...sigh. Thanks, -JM (23 years ago, 20-May-02, to lugnet.robotics)
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| |
| | Re: BrickFest 2002 Presenters Wanted
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|
(...) Hey John, are you thinking of recording any of these sessions to maybe put a transcript up on the BrickFest site (or wherever)? That'd be *really* cool for those of us who can't get there... ROSCO (23 years ago, 20-May-02, to lugnet.robotics, lugnet.technic)
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| |
| | Re: What happened to Spirit.ocx?
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|
(...) Hum...so then how do I get Visual NQC to work? I installed RIS 2.0 on my computer, and try to use Visual NQC and it errors out with a "Component 'SPIRIT.OCX' or one of its dependencies not correctly registered: a file is missing or invalid" Is (...) (23 years ago, 19-May-02, to lugnet.robotics.rcx)
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| |
| | Re: Microscout assembly?
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|
Thanks very much for the information, but I don't have the Microscout in front of me and won't be able to get my hands on it for a while. I'll probably have RIS 2.0 before I get to my Microscout. When I do get it, I'll give it a shot. Again, thanks (...) (23 years ago, 18-May-02, to lugnet.robotics)
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| | Re: Powering motors from the mains
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|
(...) The main problem comes from the heat generated. This isn't a problem, unless you're driving motors fairly constantly with your RCX, but can eventually cause the diodes to break down. Of course, when one half of the rectifier goes, you can (...) (23 years ago, 19-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: Powering motors from the mains
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|
(...) Ooops! Silly me! Yes, the Australian (240v) train reg adapter is also 10v AC, so fine to use with RCX. ROSCO (23 years ago, 19-May-02, to lugnet.technic, lugnet.robotics)
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| | Designing a bipedal robot leg
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|
Around a year ago I suppose I asked about curved feet - building a robot with human-like walking characteristics. I never succeeded in the feet (although it turns out some carved foam works very well.), as the robot took one complete step but could (...) (23 years ago, 19-May-02, to lugnet.robotics)
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| |
| | Re: What is exception "StackOverflowError" in method "<clinit>"
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|
(...) I have tried TextLCD.print() and it really does work. Roger (23 years ago, 17-May-02, to lugnet.robotics.rcx.java)
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| |
| | Serial cable for Dacta Interface 70909?
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|
I have just bought (second hand) a bunch of Lego Dacta things (9701, 9702) with the computer interface 70909. Of course the serial cable supplied was of the wrong type - Cybermaster Female-Female, this interface needs Male-Female. Does anyone know (...) (23 years ago, 18-May-02, to lugnet.robotics)
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| | Re: Powering motors from the mains
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|
The current is going through two silicon diodes though, with attendant .5 volt drop through each so consider if that will be a problem in this application. Likely its not. (...) Tom Napolitano tomnap@bersama.net (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| |
| | Re: cygwin error
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|
(...) what do i change and what PATH? (23 years ago, 18-May-02, to lugnet.robotics.rcx.legos)
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| | RE: latest legOS strangeness
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|
(...) Interesting question. I'll try this at home with my remote and RCX loaded with standard firmware. Anyway, that could only say that the remote control knows that it has to send a OFF (brake) cmd to the RCX when fwd and rev are pressed together, (...) (23 years ago, 17-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Powering motors from the mains
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|
(...) I'd be a little surprised at a bridge rectifier which couldn't accept DC. Many electronic appliances have them these days so that it doesn't really matter what kind of wall wart you use, so long as the voltage is in the right range. The wall (...) (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: Powering motors from the mains
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|
(...) Yes. That is what I meant. I even believe sincerely that it's what I said. :-) I am not sure who exactly within LEGO first recommended it but if you dig hard enough in lugnet.robotics I believe you will find just such a recommendation.... that (...) (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: Powering motors from the mains
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|
I think you misuderstood what Larry said (or I misunderstood what you said). I think Larry was saying that you should use the wall wart from the train speed regulator, which is what Lego recommends. Also, I dont see how you could burn out the diodes (...) (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: Powering motors from the mains
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|
Those who can use a soldering iron, and know their anode from their cathode, could build something like what I did: (URL) black box is a 7809 9v positive voltage regulator. See the data sheet here: (URL) used a 12v wall wart to power the whole (...) (23 years ago, 18-May-02, to lugnet.robotics)
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| |
| | of interest - Fw: BNA's Internet Law News (ILN) - 5/17/02
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|
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 From: "BNA Highlights" <bhighlig@BNA.COM> (...) : : : "The only person sure of himself is the man who wishes to : leave things as they are, and he dreams of an impossibility" : -- George M. Wrong. : : (...) (23 years ago, 18-May-02, to lugnet.robotics)
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| | #9701 Control Lab building set with RCX's
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|
How many RCX's and what software do you need to control the Vending Machine requiring 4 sensor input ports and 5 output ports at Brickshelf's (URL) it require RCX to RCX or Scout communication, e.g., Robolab mail? Brickshelf recently added building (...) (23 years ago, 18-May-02, to lugnet.robotics.rcx.robolab, lugnet.dacta, lugnet.edu)
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| | Re: Powering motors from the mains
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|
I have the RCX 2.0 and it doesn't hace any power connector. Lego should have thought about that and at least sell a special adapter. Anyway, they didn't. ----- Original Message ----- From: "Larry Pieniazek" <lpieniazek@mercator.com> To: (...) (23 years ago, 17-May-02, to lugnet.robotics)
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| | Re: Powering motors from the mains
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|
(...) You can do this but it's not recommended. As the RCX 1.0 has a bridge rectifier on the power input, it's recommended you use a 10v AC supply, to avoid buring out the diodes. ROSCO (23 years ago, 18-May-02, to lugnet.technic, lugnet.robotics)
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| |
| | Re: Kris's VCS ActiveX Component
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|
(...) It means "hard to find". The fact that you answered 6 months later is proof of that! (23 years ago, 17-May-02, to lugnet.robotics.vc)
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| |
| | Re: Kris's VCS ActiveX Component
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|
(...) Duncan, check out my website www.snoozysplace.be.tf You will find the latest version over there, and also my emailadres where you can ask me for the password. btw, English isn't my native language, so what does "elusive bloke" mean ? Greetz, (...) (23 years ago, 17-May-02, to lugnet.robotics.vc)
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| |
| | Re: What is exception "StackOverflowError" in method "<clinit>"
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|
(...) StackOverflowError could either be a stack overflow (maximum depth is 10) or a thread that dies from whatever exception (that seems to be a bug, but I couldn't yet figure out what causes it). I suppose TextLCD.print should work, though I never (...) (23 years ago, 17-May-02, to lugnet.robotics.rcx.java)
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| | Re: Powering motors from the mains
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|
(...) No, they didn't, that was just a rumour. You can power an 1.5 or 2.0 RCX by connecting a _regulated_ 9V DC supply to the battery connectors (with the correct polarity of course). To power 3 stalled motors I think you need around 1A (not quite (...) (23 years ago, 17-May-02, to lugnet.robotics)
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| |
| | Re: cygwin error
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|
(...) / (...) 1) gcc for the H8/300 can be called h8300-hms-gcc or h8300-hitachi-hms-gcc. You may need to edit legOS's Makefile.common 2) Is the h8300 gcc in the PATH? Max. (23 years ago, 17-May-02, to lugnet.robotics.rcx.legos)
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| |
| | Re: somewhat off topic, but...
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|
Repost to proper newsgroup... ===...=== I'm NOT biased because I DIDN'T write the thing... Forth is a wonderful language that has a proven track record. I don't use it in my job simply because management has never heard about it. I don't mean to (...) (23 years ago, 17-May-02, to lugnet.robotics.rcx.pbforth)
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| | Re: Powering motors from the mains
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|
In lugnet.technic, Mark Morgan writes:> (...) wanted to power, it is exactly what you need and no extra. Those 4548s turn up in the strangest places, though, so haunting old and poorly managed stores (TRU comes to mind, as Mark said!) that carried (...) (23 years ago, 17-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: latest legOS strangeness
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|
(...) I may be wrong - 'my' RCX is actually my brother's, and is 3 hours drive away - but doesn't the remote control with the official firmware do float when buttons released, but brake if forward and reverse are pressed together? Max (23 years ago, 17-May-02, to lugnet.robotics.rcx.legos)
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| | Re: Powering motors from the mains
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(...) Thanks Larry and JB (via e-mail) I'll be following your advice. I'd always assumed the track power connection was hard-wired but this pic shows where a standard connecter attaches. (URL) the speed regulator facility might come in handy too. (...) (23 years ago, 17-May-02, to lugnet.technic, lugnet.robotics)
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| |
| | Re: Powering motors from the mains
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(...) 4548s were 5ukp in Toysrus a while back Someone in the UK has a UK 3 pin adaptor for $5 (URL) sure you can find a UK person to trade a controller. Mark (23 years ago, 17-May-02, to lugnet.technic, lugnet.robotics)
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| | RE: Microscout assembly?
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Last night I took apart my Microscout just to see what was going on... Unfortunately, my pictures look like crap, so it'll be a few days before I post those (at least, the closeups of the guts). In the meantime, you'll have to suffer with my equally (...) (23 years ago, 17-May-02, to lugnet.robotics)
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| | Re: Part modifications
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Don't cut anything. In this exact same situation, I use a pair of medium pulley-wheels, mated together with half-pins through the six outer holes (3 in one direction, 3 in the other). There is very little grip area, but because you are right at the (...) (23 years ago, 17-May-02, to lugnet.robotics)
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| | Re: Powering motors from the mains
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(...) Purist approach is to use a 9V train speed reg and LEGO(r) wires from the speed reg to your motor(s), possibly through the polarity reverser switch to give control. The speed reg is powered from a wall wart trafo so if you buy a UK train set (...) (23 years ago, 17-May-02, to lugnet.technic, lugnet.robotics)
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| | Powering motors from the mains
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I find batteries a pain, especially as there output isn't constant over their lifetime, therefore I'd love to be able to power my motors from the mains. I'd like to know what methods their are are doing this. I'd prefer a purist option but I do know (...) (23 years ago, 17-May-02, to lugnet.technic, lugnet.robotics)
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| | Re: BrickFest 2002 Presenters Wanted
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(...) Sounds like a great line-up, I wish I could make it! Oh, well, there's always next year... ROSCO (23 years ago, 17-May-02, to lugnet.robotics, lugnet.technic)
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| | Part modifications
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Well, this is probably off-topic for this forum, but I couldn't really find a suitable one and it *does* involve Mindstorms parts, sort of. ;) The one piece that seems not to be available but always in need for me is a part with a short axle on one (...) (23 years ago, 17-May-02, to lugnet.robotics)
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| | Re: somewhat off topic, but...
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I'm NOT biased because I DIDN'T write the thing... Forth is a wonderful language that has a proven track record. I don't use it in my job simply because management has never heard about it. I don't mean to imply that languages are chosen by (...) (23 years ago, 17-May-02, to lugnet.robotics.rcx.legos)
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| | Re: latest legOS strangeness
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(...) is (...) Not really.. braking using the current generated by the motor (acting as a generator) once the power is removed from it. H-Bridge has what is called a break bit. The break bit simply shorts the two terminals on the motor together, (...) (23 years ago, 17-May-02, to lugnet.robotics.rcx.legos)
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| | Re: latest legOS strangeness
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(...) Maybe make this selectable with a build option? The bad thing about brake is that it actually draws current (=reduces battery life) ROSCO (23 years ago, 17-May-02, to lugnet.robotics.rcx.legos)
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| | Re: where buy Rot Sensor and Micro Mot in EU
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You can buy the micro motor from your local Lego Dacta distibutor. See a list here: (URL) can get the rotation sensor in the Ultimate Acessory Set (#3801), which has lots of other useful bits, including the remote control and a touch sensor. (...) (23 years ago, 16-May-02, to lugnet.robotics)
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| | Re: Microscout assembly?
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Hmm... Well, you could try www.mindstorms.com (or whatever it is) and look fo the configuration. I remember looking around that side and seeing some diagrams and shematics. I have that set too, and I have no intentions of taking it apart (lucily) (...) (23 years ago, 16-May-02, to lugnet.robotics, lugnet.robotics.microscout)
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| | Re: where buy Rot Sensor and Micro Mot in EU
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(...) If you check eBay you will find them sometimes. Do a search on 'Lego Mindstorms'. In fact, one Micro Motor just went up for auction to-day. Look here: (URL) (23 years ago, 16-May-02, to lugnet.robotics)
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| | Re: where buy Rot Sensor and Micro Mot in EU
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(...) Well, you can try www.bricklink.com . They are worldwide and are sort of like Ebay for LEGOs. Or maybe check E-Bay. They`ve got lots of LEGO's cheap. Car (23 years ago, 16-May-02, to lugnet.robotics)
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| | where buy Rot Sensor and Micro Mot in EU
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Does anybody know where I can order the Rotation Sensor (#9756) and MicroMotor (#5119) from Europe (I live in Belgium) ? I asked "Lego Direct Europe", but they claim these are not for sale separately. Many thanks ... (23 years ago, 16-May-02, to lugnet.robotics)
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| | cygwin error
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i got this error while trying to setup legOS 0.2.6 i'm running windows XP scott@FAMILYCOMPUTER /legos-0.2.6 $ make depend for i in util lib boot demo ; do make - --unix NODEPS=yes -C $i depend || exit 2 ; done make[1]: Entering directory (...) (23 years ago, 16-May-02, to lugnet.robotics.rcx.legos)
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| | Re: nqc question
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(...) I don't see how that could possibly work - where does this code turn the motor off? You need something like: task sensor_to_motor () { while ( 1 ) /* Do this forever... */ { Off ( motor ) ; /* Turn the motor off */ while ( sensor == 0 ) /* (...) (23 years ago, 16-May-02, to lugnet.robotics)
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| | RE: nqc question
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Roel, If it's not critical to monitor/control the motor with the RCX, you could use Lego's 9V battery box (part #5391 on S@H). It has a pushbutton-type switch. This saves you a motor port, sensor port, and programming. However, it is larger and not (...) (23 years ago, 16-May-02, to lugnet.robotics)
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| | Re: latest legOS strangeness
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I was torn between 'float' and 'brake' when implementing the remote control handler. I eventually opted for 'brake' since that is how the Lego RCX firmware does it. With regard to the strange motor behavior. I too noticed this while debugging the (...) (23 years ago, 16-May-02, to lugnet.robotics.rcx.legos)
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| | Re: nqc question
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(...) What combinations of if while and until did you use? I'm not sure if you tried this already, but I would think that you could simply use the following code: while(1) { if(SENSOR_X == 1) On(OUT_Y); until(SENSOR_X == 0) } that should check it (...) (23 years ago, 16-May-02, to lugnet.robotics)
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| | output to input connection
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I was sitting at my desk trying to figure out what it would take to send a variable value to the computer using NQC, and I couldn't figure anything out. I thought I might be able to use datalogging with a rotation sensor and a motor, but then I (...) (23 years ago, 16-May-02, to lugnet.robotics)
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| | nqc question
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I want to have a motor turn as long as i press a touch sensor and stop when i release it. This is probly a very simple problem but I cant seem to solve it. I tried if while and until but for some reason it didn't work *** email: (...) (23 years ago, 16-May-02, to lugnet.robotics)
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