 | | Re: Interactive C Primitives
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[Fred G. Martin] spake unto the ether: (...) Security through obscurity is always a bad idea :-) I can agree that software data structures are not public, but all the hardware stuff should be documented, since it's not likely to move around. *Rich* (26 years ago, 7-Feb-99, to lugnet.robotics.handyboard)
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| | Re: BEEPER
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it *might* be comms problems between the HB and your PC. if you can find an old 386/486, try the downloader on that. also, try booting your PC into DOS mode and see if things work better. f. In your message you said: (...) (26 years ago, 7-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Interactive C Primitives
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these are documented in sec 5.10 of the hb tech ref. the larger issue is knowing the places you are supposed to peek and poke. some of these are hardware specific (e.g, motor port); others are software based/defined in the pcode implementation (...) (26 years ago, 7-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Interactive C Primitives
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My apologies for having posted this question. After re-reading the HB Tech Manual for the umpteenth time, para. 5.10 suddenly appeared out of nowhere! *Nick hangs his head in shame* - - - Nick - - - (...) (26 years ago, 7-Feb-99, to lugnet.robotics.handyboard)
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| | Interactive C Primitives
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There are several IC primitives for which I cannot find documentation nor source, such as: poke, peek, pokeword, peekword, bit_set, bit_clear These six are relatively simple to figure out by context and familiarity with other languages, but I find (...) (26 years ago, 7-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Sonar Issues
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The quickest check is to go from V+ of the diode string and see if continuity to pin 1 of TL851 and pin 5 of SN28784 are less than 5 ohms. Similarly check from ground of your power connector to pin 3 of TL851 and pin 16 of SN28784 are less than 5 (...) (26 years ago, 7-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Dinsmore Compass 1490
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The Dinsmore 1490 (basically a Hall effect unit) reports the 8 cardinal compass points, a 45 degree precsion (N-NE-E-SE-S-SW-W-NW). If you wanted more precision then you have to upgrade to the Dinsmore 1525 or 1655 which produce analog signals. They (...) (26 years ago, 6-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Dinsmore Compass 1490
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(...) Why would you want to? They would be as expensive to build than to buy. The Dinsmore device is only $12, and PNI Vector2X is $49. (retail, probably cheaper somewhere). The Dinsmore device has a compass mechanism (real basic, like you take (...) (26 years ago, 6-Feb-99, to lugnet.robotics.handyboard)
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| | [moderately off topic post] LCD shutter material?
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Hi all, This really doesn't have anything to with the HB, but I'm at my wits end: I'm building a large high speed shutter-type device that will be controlled by a microcontroller (likely a BS2SX). Years ago I heard of a type of LCD shutter material (...) (26 years ago, 6-Feb-99, to lugnet.robotics.handyboard)
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| | IR Proximity Detector using a pic
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Hi, I found this very easy and cheap to build IR Proximity Detector. It uses one PIC12C508 or 509. I post this on the mailing list, because i searched some days until i found it, and maybe there are people, who are searching the same :) For those (...) (26 years ago, 6-Feb-99, to lugnet.robotics.handyboard)
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| | RE: Dinsmore Compass 1490
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You say these devices just use hall effect devices to detect the direction, do you have any technical information that would assist in producing a digital compass from scratch ?. Thanks John Hatton mailto:johnhatton@email.com (...) (26 years ago, 6-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Dinsmore Compass 1490
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(...) The dinsmore devices are really easy to work with. This one has 4 hall effect devices in it, and the output is digital. If you align it with cardinal coordinates you can tell North, East, South, and West very easily only one device is (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Please help!!!!!!!
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yes, the only change is that R11 moved (and should be 5 watts now). sorry i haven't updated things, but that's really all that's different. fred In your message you said: (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Dinsmore Compass 1490
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Hi, I found this on the internet, and I wanted to know if anyone is using it: (URL) produce a digital Compass which is very cheap ($12 only). Anyone already used such a compass ? Is there a way to get such a compass working with the HandyBoard ? (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Sonar Issues
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Bill - - Thanks! - - - Nick - - - (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Sonar Issues
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(...) It's possible that the flat flex cable could make electrical contact either way, since the socket has "teeth" in it that could penetrate the insulation on the one side of the cable. And *don't* trust that the dotted edge is the correct one; I (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Parts list up-date
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I will be going down to my local electronics store to buy the part to put two of these boards together. I have been going through the list to get a true description of all the parts and have found that Digi-key no longer stocks some parts by the (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Sonar Issues
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Thanks. That seems to have done it. I don't know how I missed that line. Way cool device. Thanks again for your help. Stephen Michael sa_michael@hotmail.com (...) MHotMailB8836FEE69C5...0D6B0DFE0; Thu Feb 04 14:53:35 1999 (...) didn't use HELO (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Please help!!!!!!!
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We ought to get Fred's input on this; however, the only change I see is that Resistor R11 has been moved between versions 1.0 and 1.1. Everything else looks to me to be the same between the two versions. (...) ___...___ Chad Pennebaker, President (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Sonar Issues
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(...) Please explain. Now I'm worried about damaging my sonar board. Since the foil cable has conductors on only one side, I didn't think that it was possible to plug it in "backwards" and still make an electrical connection. My understanding of the (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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