 | | 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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