 | | Re: Time available during 1 kHz system interrupt?
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Hi Greg, It all depends. Various features of the HB can be turned on and off to change the amount of work done in the main ISR. By default the code uses 300ms to execute. The file lib_hb.c provides the following: /***...***/ /*** System Interrupt (...) (26 years ago, 2-Nov-99, to lugnet.robotics.handyboard)
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| | Re: Cat by the tail!
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(URL) has several "kits" that are designed for classrooms. The RIS can be purchased in bulk (4 Mindstorms bricks) plus 1600 other pieces. (...) (26 years ago, 2-Nov-99, to lugnet.robotics.edu)
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| | Re: Help needed reviving my HB
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Hi Everybody, Ensio, I'm having a very similyar problem, but with an interesting twist! Check this out! I still don't have any idea what is going on here... None of these have expansion cards. I have 5 HB's from when this robotics class was taught 2 (...) (26 years ago, 2-Nov-99, to lugnet.robotics.handyboard)
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| | Re: walker that turns?
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(...) <De-lurk> What about making the legs on one side take shorter steps? Seems like the Imperial Walkers were pretty clumsy beasts, and a slow-plodding turn like this would be appropriate. My $0.02... - Christian <Lurk> (26 years ago, 1-Nov-99, to lugnet.robotics)
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| | Re: walker that turns?
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It's fairly simple with a tripod gait. First, get it working walking forward ... watch how it walks until you understand what is happening. Then reverse the action to get your 'bot to walk backwards. Watch it for awhile more. Now to turn left have (...) (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: Help needed reviving my HB
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Hello Edward and everyone, There are several causes that the Handyboard won't boot. 1) 62256 SRAM was dea 2) 74HC244 was dead 3) The Handyboard cannot put into bootstrap mode You can try to do the followings: Removes all the ICs on Handyboard except (...) (26 years ago, 2-Nov-99, to lugnet.robotics.handyboard)
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| | Re: idiot's guide to programming the rcx
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(...) The almost universal answer to the question "what is the best/easiest alternative programming language for the RCX" is three little letters: "NQC." If you are at all comfortable with programming in a "scripted" language like BASIC, then you (...) (26 years ago, 2-Nov-99, to lugnet.robotics.rcx)
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| | Re: Help needed reviving my HB
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Hello, Sorry, I made a mistake. "74HC244 was dead" should be read as "74HC373 was dead" This is the one soldered on the board directly without socket. It is located underneath the SRAM. Removing all ICs except 74HC132, 62256 SRAM, and MC68HC11 CPU (...) (26 years ago, 2-Nov-99, to lugnet.robotics.handyboard)
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| | Re: Need Balls!
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I just received the message below from Mary at FLL, apparently you can order directly from them. Hope that helps, - Ben. ---...--- Ben Williamson benw@pobox.com (URL) Forwarded message ---...--- Date: Mon, 01 Nov 1999 10:11:18 -0500 From: Mary T. (...) (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: Scout secrets revealed
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Hao-yang Wang wrote in message ... (...) a (...) So far, the Scout hasn't responded to the barcodes, it only emits it at certain points in its program. As I recall, in power mode it emits a barcode when you touch 'C'-motor on the remote, but this (...) (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: Scout secrets revealed
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Robert Munafo wrote in message ... (...) The URL I gave is just as real ;-) I prefer people to use the latter URL since it enables them to navigate the site. Eric (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: 1.0 to 1.5 upgrade
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(...) Thanks for the info! It 'll save me $25 and a big disappointment. Eric (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: ABC News coverage of "Astronaut Companion" Robot
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Not to be a nudge back at you, but I believe that they DO use fans. The information that I saw regarding these gave me the impression that they were for INSIDE the spacecraft. Where there would be plenty of air, in use for other relatively mundane (...) (26 years ago, 2-Nov-99, to lugnet.robotics.edu)
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| | Re: Time available during 1 kHz system interrupt?
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Interesting discussion but it raises a few more questions. Are there any (bad) side effects when user code that is inserted in the ISR takes longer to execute than the 1 msec interrupt cycle. From experience it appears that the ISR runs on the next (...) (26 years ago, 2-Nov-99, to lugnet.robotics.handyboard)
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| | Re: How to get Dacta #9633 Pneumatics Set
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The Construction Site (www.constructionzone.com), an all-construction-toys store in Waltham, Mass., USA, carries a pretty good selection of DACTA, and can probably special order any sets. Their one gripe is that it has been difficult for the store (...) (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: How to get Dacta #9633 Pneumatics Set
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Whoops! Wrong URL. It's www.constructiontoys.com . Sorry! -----Original Message----- From: The WordMeister <dwilcox@wordsmithdigital.com> To: C S Soh <cssoh@singnet.com.sg>; lego-robotics@crynwr.com <lego-robotics@crynwr.com> Date: Tuesday, November (...) (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: Categorizing uploaded robot images on legomindstorms.com
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Russell Stoll <admin@legomindstorms.com> wrote in message news:FKJB41.A1C@lugnet.com... (...) Russ; I would try to put the categories in a tree structure. The for example first branch might be Mobil or Stationary. Then for Mobil the branch might be (...) (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | RE: Categorizing uploaded robot images on legomindstorms.com
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(...) Here's another idea - shamelessly stolen from a great bit of software called SuperJPG. (URL) This is (in my opinion) the best JPG indexing tool available. Anyways, the package lets you add "keys" to your images. It works like this: Suppose you (...) (26 years ago, 2-Nov-99, to lugnet.robotics)
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| | Re: Cat by the tail!: Rcx / MindStorms Classroom
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Fred, I'm confused by the Pitsco site. Which package are you referring to as the "Mindstroms Bulk" set? Have you seen one of these?? I'm wondering if there is any advantage over 4 retail Mindstorms sets at $199 each or so.... Software: I was (...) (26 years ago, 2-Nov-99, to lugnet.robotics.edu)
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| | Re: Cat by the tail!
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Steve, I'm working on some material; will be developing more as I teach some Middle School kids starting soon. Let's try to collaborate here. I am researching other Education links and lists for current Mindstorms users in Education. I will try to (...) (26 years ago, 2-Nov-99, to lugnet.robotics.edu)
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