 | | 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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| | Please help!!!!!!!
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I have a serial/batt board that's version 1.1 and it is not the board specified in the assembly manual so I have no clu on how to construct the thing I searched the site but there are no assembly instructions for this version can somebody help me (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Matrices with Interactive C?
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Adam: You have made a 2 dimensional aray? How did you do it? Did you use int foobar[2][3]; ?? I cound not get it to work this way. Thanks for the insights, --philsky (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Sonar Issues
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There is a very high probability that you plugged the foil cable in backwards. Doing so, even for a moment, will destroy the IC chips. It will still click (I haven't figured that one out yet), but the IC chips and possibly even the electrolytic (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Matrices with Interactive C?
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I don't think it 'directly' supports matrices, but I have used a 2 dimenstional array to simulate a matrix. You may have to write some functions for multiplication etc, but it works ok. -----Original Message----- From: Peter Eacmen (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: stack pointer
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Windows tips: Tip 1: Lose Windows!!! Reboot your computer, hit "F8" when the little message "Starting Windows 95" comes up. Select the option "Command prompt only". Now, run IC and/or DL and you should have no problems. Basically, windows is nothing (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: A few questions...
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a few notes... in the faq there is a discussion about how to measure the resistance of a motor coil, as a way of determining if it's compatible with the hb. also in the faq, is a description of a mod that will allow using a separate power supply for (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: A few questions...
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I bought their Robot Platform (roomy and sturdy!) which came with two gearbox motors. I, too, am using the HB w/exp. If the motors you received are the same as the ones that are used on their Platform then you will have trouble using them via the HB (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Re: Motor outputs
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Texas Instruments is the original manufacturer for those IC's (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | A few questions...
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Hello all, I have gotten both a Handy Board and an expansion board and they both appear to work. My servo problem reported earlier is no longer an issue. I plan to use the HB with two High Power gear box/motor sets I got from HVW Technologies. They (...) (26 years ago, 5-Feb-99, to lugnet.robotics.handyboard)
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| | Matrices with Interactive C?
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Does interactive C support matrices? (26 years ago, 4-Feb-99, to lugnet.robotics.handyboard)
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| | 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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