 | | Quick Mindstorms article in DNJ Jan/Feb 2002
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Just received my copy of DNJ (Developer Network Journal) and on page 53 (the Backend section) there is a sidebar talking about Mindstorms. Half talks about the competition they ran in Mar/Apr 2000 and what the Mindstorms set can do, and the other (...) (24 years ago, 31-Jan-02, to lugnet.robotics)
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| | Re: Control the RCX from AppleScript
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(...) Ahah! Check out the following SourceForge projects - still sadly in the VERY early stages! - for some potentially good news: (URL) too have USB devices that have been rendered useless by OS X and companies not wanting to bother upgrading (...) (24 years ago, 31-Jan-02, to lugnet.robotics.rcx.nqc)
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| | which Linux distro?
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Hi, I am thinking of moving over to Linux, partly for legOS reasons (Lnp easier to set up for a start), but partly for other reasons (free software, morality etc, ie the usual waffle.) I am considering Redhat 7.2, Suse 7.3 personal or Suse 7.3 (...) (24 years ago, 31-Jan-02, to lugnet.robotics.rcx.legos)
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| | Bulk parts
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FYI PITSCO has expanded their parts offerings in their new catalog - the web site does not seem to have been upgraded to match the catalog yet. Some backordered, but hey, I really need some 40 nd 24 tooth gears, not to mention a ton more pulleys. (...) (24 years ago, 31-Jan-02, to lugnet.robotics)
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| | Re: Interactive C Version 4 is available for free download
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Hi everyone, Randy sent me the enclosed msg which answers some of Scott's questions. Or at least, indicates they will be answered. I'd suggest we wait for Randy to update things as he indicates he will, and then later fire away with questions to (...) (24 years ago, 31-Jan-02, to lugnet.robotics.handyboard)
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| | Re: Interactive C Version 4 is available for free download
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(...) To answer my own question, look in ./Interactive C 4.0/RCX/lib_rcx.doc for a list of RCX specific functions. To summarize the important ones: IC NQC ---...--- fd(A/B/C) OnFwd() bk(A/B/C) OnRev() brake(A/B/C) Off() off(A/B/C) Float() (...) (24 years ago, 31-Jan-02, to lugnet.robotics.handyboard)
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| | Re: External motor power and expansion board combo problem?
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Duncan, You've done a good analysis of the potential impact of changing the motor supply to an external source....when you are using the Expansion Board. Undoubtedly there are several ways to accomplish what you want, but the way I did it DOES (...) (24 years ago, 31-Jan-02, to lugnet.robotics.handyboard)
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| | Re: Interactive C Version 4 is available for free download
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Hi Fred Is there a summary of the new features developed in IC 4 ? From the Newton Labs IC 3.x page they list the improvements over the freeware (2.x) version as: (...) Does the 4.x pcode support structs/multidimensional arrays ? What extras does (...) (24 years ago, 31-Jan-02, to lugnet.robotics.handyboard)
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| | Re: "Servo" Driver for NQC
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This is a long post. It covers the following: 1. How the "WAIT x 10 msec" opcode is implemented and its inherent inaccuracy for low delays. And suggests an alternative code implementation 2. How RCX motor PWM is implemented. And the implication that (...) (24 years ago, 31-Jan-02, to lugnet.robotics)
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| | Re: Interactive C Version 4 is available for free download
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(...) I started playing with this on the RCX last night. Is there a README somewhere on the RCX-specific aspects of the firmware? eg I noticed analog() isn't supported to read raw sensor readings, although digital() works to read passive touch (...) (24 years ago, 31-Jan-02, to lugnet.robotics.handyboard)
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| | Re: "Servo" Driver for NQC
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"Matthias Jetleb" <Jetleb@Netcom.ca> wrote in message news:3c5763f6.195969...net.com... (...) Ooooooooo, someone else is actually NOT doing a gantry? ;) (...) The mass is at a minumum, but due to the size fo the robot to get the required work (...) (24 years ago, 30-Jan-02, to lugnet.robotics, lugnet.org.ca.rtltoronto)
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| | Re: "Servo" Driver for NQC
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"Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3C56F4B7.FC698E...ail.net... (...) Then why doesn't it work? :-/ At lower power settings, all it seems to do is sit there and humm, not wanting to go. It really dosen't work that well in (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: IP on Mindstorms
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(...) It's still on /. It's worth mentioning that this isn't the first stack. The Inferno Styx-in-a-Brick has been around a year or so. (URL) -- ___...___ Day by day the Penguins are making me lose my mind. Bumper Sticker The Armadillo Group (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: Control the RCX from AppleScript
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Sorry for the quick updates, but Robot Controller 1.4b2 is now available! This adds the ability to control several motors simultaneously in AppleScript. I have also posted an example AppleScript Studio project which uses Robot Controller to drive a (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.nqc)
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| | Re: Running Vision Command on XP
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Great work, Ted. Do you think a similar hack could make Lego Studios run under XP? Anyway, this workaround just underlines the poor, poor support from Lego. The VC/Studios support sites does not even mention XP! Wake up, Lego! A company thats says (...) (24 years ago, 30-Jan-02, to lugnet.robotics.vc)
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| | Re: "Servo" Driver for NQC
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The ON/OFF bang-bang control you are trying has some problems that proportional control does not. While it is true that if the update rate is high enough, or the controlled plant damped enough, that switching a drive ON and OFF can simulate (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: Incorrect result
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(...) Yes, this is what happens when one is used to just making everything long and not considering overflows. Even worse was that I was doing the math on the computer's calculator, but not looking at the intermediate result, just typing in the (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: BricxCC release 3.3.3.4
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hi Guido, I just a very little time also the comming week, but my first impression is very good !! Thanks very much. And you said you weren't a fast programmer ;-) (...) It sound great indeed. (...) I couldn't get it to work, but maybe I did (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.nqc)
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| | Re: Incorrect result
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(...) 256 * 128 = 32768, one higher as the biggest positive integer value. The cast to long would help, but your cast is too late. I have not tested, but I think rc += ( (long)b->magnitude * (long)TA_costable[...] ) >> 7; will help. Try output in (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | RE: Incorrect result
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<snipped code> (...) Robert, this is a classic problem with ranges of singed numbers in C rx = (long)(a->magnitude * TA_costable[a->direction]) >> 7; I don't have an RCX in frot of me, but I think you need to cast a->magnitude to long before the (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | Incorrect result
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This problem, unlike the other, is definitely not a result of my eyes/brain being tired or something. I thoroughly displayed every value before and after evaluation and the result is ***WRONG***. Here is the code and the values: typedef struct { int (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: "Servo" Driver for NQC
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(...) <snip> (...) Right, but in the firmware PWM, it is 'on-float-on-float' not 'on-brake-on-brake' I think (but I'm not sure). In fact, the 'on-brake-on-brake' is a neat way to get fine control to (say) just crack a pneumatic valve to move a (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | RE: true tcp/ip on the RCX
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Hi :) Just out of curiosity, check this thread from Jan/2000: (URL) mc. (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | RE: IP on Mindstorms
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FOUND IT ! -> (URL) was 2 years ago, 3-Jan-00 ! :) phew... mc. (...) (URL) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | RE: IP on Mindstorms
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Check (URL) was posted on the legOS list. mc. PS: I was under the impression that a few years ago (one,two?) someone here did a HTTP server with a RCX. I just can't find info about it anymore :/ (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: IP on Mindstorms
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(...) See this thread: (URL) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: true tcp/ip on the RCX
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(...) <snip> (...) <snip> Yeah, I've got a server farm of 3 million RCXs. Each hosts errrrr... 1 page. ;-) Great job Olaf! Steve Martin IndyLUG (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | IP on Mindstorms
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SlashDot yesterday had a story on someone putting an IP stack into the RCX. I expected to read about it here, but don't see anything. Does anyone have the story? --Jack Gregory (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: "Servo" Driver for NQC
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"Steve Baker" <lego-robotics@crynwr.com> wrote in message news:3C56E677.33FD99...ail.net... (...) Floating (...) if (...) I cannot gear it differently - the geartrain is optimized for the correct speed I must achieve. Float doesn't work because of (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: true tcp/ip on the RCX
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"Olaf" <christ_o@gmx.de> schrieb im Newsbeitrag news:Gqo0BH.E9t@lugnet.com... (...) calls (...) <---snip----> Hi Olaf, i think it´s the wrong way to blow up the legOS kernel with a ip-stack, because you lost valuable RCX memory to legOS (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: Control the RCX from AppleScript
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The lego camera will not work with imovie, I'm afraid. Imovie only works with DVcameras, not with webcams. I think the lego camera is actually one of the logitech cameras inside, so there may be a MacOS 9 driver, but not a MacOS X driver. I don't (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.nqc)
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| | External motor power and expansion board combo problem?
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I wish to make the small mod to allow for external power to the motor outputs of the main board. However, this seems to cause several potential problems with the expansion board. First, the motor power connector is occupied by the motor power (...) (24 years ago, 30-Jan-02, to lugnet.robotics.handyboard)
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| | Re: Lego Studios Cam and Macintosh
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(...) I tried the Philips driver back when I hunted down drivers to make it work. Multiple drivers were tried, but nothing worked. I'll put a list together before BW and someone else can benefit from the info in the future. I'd try iMovie if I had (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: Lego Studios Cam and Macintosh
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(...) Did you try that Philips driver referenced in Barney's post? What about the iMovie thing? Matt (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: Lego Studios Cam and Macintosh
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(...) You got it, Matt! The camera will go to BricksWest. We'll test it out on site. If you or anyone else has any more ideas on how to get this to work, I'm still open to suggestions, but so far I haven't located drivers that would allow it to work (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: "Servo" Driver for NQC
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(...) But it doesn't need to. The 'power' settings built into the RCX firmware are already using pulse-width modulation to adjust the amount of power the motor delivers. ---...--- Steve Baker ---...--- Mail : <sjbaker1@airmail.net> WorkMail: (...) (24 years ago, 29-Jan-02, to lugnet.robotics)
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| | Re: Using un`Lego sensors
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(...) The trouble with this (I suppose) is that the precision of the A-to-D convertor in the RCX is going sharply limit the angular precision when that number range is 'stretched' over ten revolutions. I've seen the devices you talk about though - (...) (24 years ago, 29-Jan-02, to lugnet.robotics)
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| | Re: "Servo" Driver for NQC
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(...) I have to disagree with your approach. Even at low speeds, alternating between pushing on the gas and stamping on the brake isn't the way to drive smoothly. Perhaps you need to gear the machine differently and use less power during the ON (...) (24 years ago, 29-Jan-02, to lugnet.robotics)
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| | Re: Lego Studios Cam and Macintosh
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(...) Here's a follow-up to this issue, from a thread in .robotics: (URL) anyone, post if you get this thing to work, as I am still interested in the camera myself if we can get it to work... And has anyone tried my iMovie idea? If no one is capable (...) (24 years ago, 30-Jan-02, to lugnet.robotics)
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| | Re: Control the RCX from AppleScript
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(...) Well, that helps some anyway...I'll cross post your info into the thread where we were last talking about this...I'm still waiting to see if anyone has tried opening iMovie with the LEGO camera plugged in, to see if will auto-recognize it...no (...) (24 years ago, 30-Jan-02, to lugnet.robotics.rcx.nqc)
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