 | | Re: handy board troubles...
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(...) Sorry about this, I meant 32K. John (...) completely (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | Re: handy board troubles...
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(...) Yes! I apologize, I meant "..._without_ the RJ11 cord connected..." Is it possible a surge could have fried the RAM and now it won't hold memory? That was my contention, but I'm not sure... John p.s. RAM replacement question: Will any 64K CMOS (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | Re: Acroname robotics...
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(...) Acroname certainly seems to be the best source for the GP2D12 and Polaroid sonar. (...) I'm a fool, too. That's why I went with the fully assembled & tested Handy Board from Patrick Hui. The only things I had to add were the NiCd battery and (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | Re: handy board troubles...
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(...) ^^^^ Do you mean without? That's my problem; the board only holds its data if the cord is plugged in. (...) I've also got a servo which I can't figure out how to drive from the exp. board, but the problem of the RAM discharging happens even (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | Acroname robotics...
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I am looking to buy a Handy Board, Expansion Board, motors, GP2D12 sensors, Polaroid 6500 instrument package, and maybe the Eltec sensor. I will likely use Acroname, as they appear to have pretty good prices and I can save a few $$ on shipping. Has (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | Re: resistor pull-up help!
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the exp bd inputs plug into the inputs on the main HB. so you still have to remove the pullup on the main HB. just cut the short trace on the underside of the board between the signal input pin and the pullup resistor. f. In your message you said: (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | Re: handy board troubles...
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Actually Jake, I'm having a similar problem right now, with regard to loss of RAM capabilities. I've been testing a new Polaroid 6500 sonar (which now works!) on the HB and I've got it hooked up through the exp. board. I tried to run a simple (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | resistor pull-up help!
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Hi all, I'm trying to connect a pair of GP2D12 to my handyboard. I know there is an issue with the handyboard pull-up resistors and these devices so I figured I'll try to use the unused LEGO sensor connectors on my expansion board (I don't have any (...) (25 years ago, 21-Mar-00, to lugnet.robotics.handyboard)
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| | RE: Required tools for assembly
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Bob: If you have major problems with the handyboard you would have better luck with a logic analyzer than with an oscilloscope, however, I have build two handy boards successfully without any of these tools straight out of the box. Just be careful (...) (25 years ago, 20-Mar-00, to lugnet.robotics.handyboard)
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| | Required tools for assembly
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Can somebody please tell if it is absolutely necessary to have an oscilliscope for the assembly of and H board? If so, what are my INEXPENSIVE options/suppliers? What is a logic probe? is it a 5vdc test lamp? Can I get this kind of stuff at radio (...) (25 years ago, 20-Mar-00, to lugnet.robotics.handyboard)
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