 | | Re: Close out blank PC boards
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i would ask people to please not patronize this person, as his email is a spam. thank you, fred (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: stack pointer
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it's probably a comms problem. make sure to use full screen dos window. maybe other windows people can suggest tweaks they've used to get their machines talking to ethe board reliably? fred In your message you said: (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Sonar Issues
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did you put the capacitor c7 (0.1uf) in the sonar board, as indicated in the directions? if not, plesae do so and let me know if this solves your problem. fred In your message you said: (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Close out blank PC boards
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I obtained the close out inventory (about 450 boards) of a custom printed circuit board manufacturer and I am offering the following sizes to others wanting to make their own printed circuits using these blank boards. 1ea 3x5 $ .45 double and single (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | RE:stack pointer
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hi fred and all, i am facing a problem with the handyboard about the stack pointer. every time i use a check on the digital and analog port on the console window, it will give me a result of stack pointer off by 65... bytes. i would like to know (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: sensors for tennis ball
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Hi all, Does anyone know how advanced is the lego mindstorms robotics kits? And how much programming can you do with them? thanks -Mike (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | RE: Handyboard Expansion Sonar Issues
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To anyone who can help: I too have contructed the HB expansion board. All i/o ports appear to work. The servo controllers appear to work well also. However, like Ranjit, I'm having Polaroid Sonar problems. I got this as a kit from Wirtz Electronics. (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Unsubscribe
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Thank's for the help !! Bye (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: NVRAM
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Dallas Semiconductor makes some static RAMs with an internal battery. One of them is the DA1230AB/Y, a 256kbit (32Kbyte) battery backed static RAM. (URL) - - - Nick - - - (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Memory erase or reset?
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Either disconnect the batteries and all sources of power or remove the memory chip.... -phil (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: R4 Resistor
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thank you! yes, 3.83k is correct. fred In your message you said: (...) ile (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Re: R4 Resistor
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"Fred G. Martin" schrieb: (...) i have had the same problem, so i havent installed the ir-circuit yet. the mistake is in "The Handy Board Technical Reference" (July 12, 1998) PDF File ... On page 46 ( i am not sure) is a Part Listing: it says : .... (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Setting the Config Register
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Greetings all! I just finished building the handyboard from a kit, and it seems to be working just fine except for the fact that I can't seem to get the config register to set to 0x0c. It is now working on the 0x0d setting, but I know this is (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: R4 Resistor
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where is this list that says 2.94K? please tell me so i can eradicate the incorrect value. to answer, yes, just use it, it affects the IR xmit frequency and nothing else. fred In your message you said: (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | NVRAM
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Hi! Here is Cesar Mello, from Brazil. I'd like to know if there is any NVRAM version of the 62256 chip, or any other solution smaller than the external batteries, or if it's possible to keep Interactive C and the user program loaded in an EPROM. (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Memory erase or reset?
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Hello, I have been loading an alternative runtime environment (not IC) onto the handy board to test it out, and I want to ensure that all of the RAM is erased before doing so. I can use the unload command in IC to delete all of the .c files, but how (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: what variety of 6811 can be used?
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Nick, Sorry, I should have posted the link but I was out of the office yesterday and could not remember where it was. Motorola has an Engineering Bulletin call "Replacing 68HC11A Series MCUs with 68HC11E Series MCUs", it can be found at: (...) -- (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | R4 Resistor
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I am almost complete with construction of my first handyboard. I used an in accurate list to order my components and have a 2.94K resistor instead of 3.83K as per the other list I have and the assembly manual. My question is; Is the resistor only (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Motor outputs
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I was wondering if anyone out there knew where to get parts for the sonar board. I have fried the two IC chips on the board, the SN28784 and TL851. Any help would be appreciated, thanks. oooo$$$...$$$oooo oo$$$...$$$o oo$$$...$$$o o$ $$ o$ o $ oo (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | HB bootstrap problem when U6 installed
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i am guessing that some of the inputs to u6 are defective, causing it to assert its outputs when it shouldn't. this could turn on the '244 input latch, driving the bus when it should not. please check that pins 1 through 6 signals are oscillating (...) (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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