 | | Re: Power to RCX
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Hi Trevyn, From the photo you posted, it appears that you have the input and output pins of the 7805 reversed. According to the datasheet, this will probably fry the regulator. I'd recommend getting a new part before continuing, so as not to risk (...) (23 years ago, 2-Feb-02, to lugnet.robotics.rcx)
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| | Re: true tcp/ip on the RCX
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Cool stuff, congrats on the Slashdot recognition. Hope the "Slashdot Effect" didn't totally cripple your server. Wondering if you or Olaf could make the LegOS code available for all to see, just wondering how it was all done for educational purposes (...) (23 years ago, 1-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: true tcp/ip on the RCX
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(...) [...] (...) A few days ago, Olaf sent me his legOS TCP/IP code which I have been running a few days, so I probably have the world's second TCP/IP-enabled Lego brick in my office :-) ! I was also able to squeeze in a simple web server, a few (...) (23 years ago, 1-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: Power to RCX
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Most "wall wart" transformers give about 3-5 volts above what is marked on them. I would not use one of these directly. However, I am currently working on using a 7809 voltage regulator. If you don't know, a voltage regulator is a small electronic (...) (23 years ago, 1-Feb-02, to lugnet.robotics.rcx)
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| | Power to RCX
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Hi all, I just got my new RIS Ver.#2, and I am far from being an electronic expert. I am wondering if a proper wall tranformer with an adapter inside the RCX to connect to the battery terminals would work for stationary application. Of course, I do (...) (23 years ago, 1-Feb-02, to lugnet.robotics.rcx)
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| | "Local Positioning System" for lego-vehicles with mice
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Hello NG, i try to develop something like a local position system with a optical RF mouse (or other mouse-devices). If someone want to join or help for this little project please mail me. A very first result you can see at (URL) (23 years ago, 1-Feb-02, to lugnet.robotics.rcx.legos)
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| | Re: Downloading Firmware
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(...) I have an E-machine that uses Windows 98. Mark (23 years ago, 31-Jan-02, to lugnet.robotics.rcx)
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| | Re: Downloading Firmware
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(...) Maybe, but I'd rather incriminate motherboard/OS/USB drivers. What do you use ? Philo www.philohome.com (23 years ago, 31-Jan-02, to lugnet.robotics.rcx)
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| | Integer-based arctangent2 function for anyone interested
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After scouring the internet for several days and even utilizing Jack Crenshaw's wonderful book "Math Toolkit for Real-time Programming", I was unable to find a good, general iatan2(y,x) function. Note that this is the atan function that takes as (...) (23 years ago, 31-Jan-02, to lugnet.robotics.rcx.legos)
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| | Downloading Firmware
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I am trying to download the firmware to the ris 1.0 & 2.0 using the usb tower but it won't finish, the rcx only counts to 200-300 & is different all the time. then it says the tower is disconnected, when i didn't even touch it. BUT the serial tower (...) (23 years ago, 31-Jan-02, to lugnet.robotics.rcx)
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| | Errors compiling egcs
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Hi, I've just downloaded and attempted to install the binutils, egcs, and LegOs on my computer as per the instructions at (URL) only difference between these instructions and what I have done is the path to where the software is to be installed. (...) (23 years ago, 31-Jan-02, to lugnet.robotics.rcx.legos)
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| | Re: which Linux distro?
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(...) Good Idea ! I had no problem using legOS when using a RedHat 7.1, Mandrake8 or a Conectiva 6.0, As far as I remember, there is a Debian package available for legOS. So... no matter which distribution you'll use, it will be far better than (...) (23 years ago, 31-Jan-02, to lugnet.robotics.rcx.legos)
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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 (...) (23 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 (...) (23 years ago, 31-Jan-02, to lugnet.robotics.rcx.legos)
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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 (...) (23 years ago, 30-Jan-02, to lugnet.robotics.rcx.nqc)
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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 (...) (23 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 (...) (23 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 (...) (23 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 (...) (23 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 (...) (23 years ago, 30-Jan-02, to lugnet.robotics.rcx.legos)
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