 | | Re: 15' max measurement
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(...) I beleive "hard" rigid materials have high reflectivity of sound, such as metal and granite, etc. Pourous materials absorb sound, like brick and wood. You may have notised that sound absorbtions usually involve foam pads on the walls and (...) (28 years ago, 14-May-96, to lugnet.robotics.handyboard)
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| | Re: 15' max measurement
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(...) I believe it would matter what type of material you reflect the pulse off of, I would guess. Different surfaces have differenc acoustical properties. Just like they have those silent rooms and echo chambers, etc. (28 years ago, 14-May-96, to lugnet.robotics.handyboard)
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| | 15' max measurement
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Yup, it looks like 15' is about as far as I can measure. In fact, if the distance is _too_ great, I start getting weird measurements, on the order of 8 or 9 feet. Strange. I turned the gain up a bit, which keeps those erratic measurements from (...) (28 years ago, 14-May-96, to lugnet.robotics.handyboard)
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| | sonar module
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Well, I finally got my Polaroid sonar module in the mail, and I got it working with my Handy Board tonight. My feelings thus far: This thing is pretty neat. However (of course), there are a few quirks that I'm trying to figure out. Distance (...) (28 years ago, 14-May-96, to lugnet.robotics.handyboard)
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| | Continuation of the quest to understand the SPI port
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Hi, Under Interactive C, something is resetting bits 6 and 4 of the SPCR register (0x1028). Whenever we try poke(0x1028,0x5C); and then do a peek(0x1028), we always get back 0x0C!!! Trying to figure out whether this was an instantaneous thing or (...) (28 years ago, 12-May-96, to lugnet.robotics.handyboard)
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| | Menu.c converted for HB
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Just to make my tiny contribution to the Handy Board community, I decided to convert the menu.c file for the 6.270 board for use on the Handy Board. It is available in the ic_contrib/jkeyzer directory on cher, for anyone who wants to check it out. (...) (28 years ago, 11-May-96, to lugnet.robotics.handyboard)
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| | Re: Summary Re: Ordering from 6270 Technologies
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by the way What is 6270 Technologies email address? I've lost my reference to it. cheers ray (28 years ago, 10-May-96, to lugnet.robotics.handyboard)
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| | Summary Re: Ordering from 6270 Technologies
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The 6.270 2.21 board set was gratuitously received on May 8th; although the original email query was sent out 11/28/95 and the check sent out on 12/5/95. The general responses that I received from people responding back is similar to the (...) (28 years ago, 10-May-96, to lugnet.robotics.handyboard)
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| | infos
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I'm a newbe in this list, not having already built my first HB (but my PCBs are on the way...) and I've some questions: - I think to try to use also ASM on the Handy ... will it be possible? and if so, as i think, where can I get infos on, by (...) (28 years ago, 10-May-96, to lugnet.robotics.handyboard)
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| | A Project In Planning
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Hi Ya, I am a team member of a team that is planning to build a robotic platform for a research project. What we want to do is build a platform with a Handy Board and a PC on it. The HB will deal with the drive motors (through and interface card to (...) (28 years ago, 10-May-96, to lugnet.robotics.handyboard)
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| | Re: handy board kit research & robot
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Handy Board main web page is: (URL) there are many links to all important information on hardware and software. Handy board is well worth the cost. I love it. An excellent company to buy from here is 'Digital Micro Systems'. I don't beleve there is (...) (28 years ago, 9-May-96, to lugnet.robotics.handyboard)
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| | handy board kit research & robot
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i search a handy board kit ??? Where i can find it and how cost it??? Can i found it in Europe or France ??? where can i found information about small robot with handy board herbron@aar.alcatel-alsthom.fr (28 years ago, 9-May-96, to lugnet.robotics.handyboard)
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| | Expansion board code
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Can anyone tell me where I can find the code to activate the beta expansion board? Larry ***...*** Larry Randall ***...*** If it works Don't fix it! ***...*** lrand@cts.com ***...*** (28 years ago, 9-May-96, to lugnet.robotics.handyboard)
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| | ni-cads in parallel
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(...) We've had a debate on this issue a couple of times on the rec.models.rc.air newsgroup a couple times recently (check out www.dejanews.com) and the consensus seemed to be that parallel packs should not be a problem. (...) You should definitely (...) (28 years ago, 7-May-96, to lugnet.robotics.handyboard)
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| | Re: ni-cads in parallel
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(...) Yes. My problem is that my motors draw somewhere around 2 amps average, and the AA pack I have is rated at 600mAh. This isn't much fun, I'm tempted to leave the thing plugged in instead of charging it every few minutes! It's really not tooo (...) (28 years ago, 7-May-96, to lugnet.robotics.handyboard)
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| | new project announcement
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"the book of ruins and desire " an Interactive Kinetic Sculpture by Pamela Jennings Thesis Presentation public slide/talk: Thursday May 9, 1996 6:30 SVA MFA Computer Arts Thesis Show: May 31 - June 15 1996 Visual Arts Gallery 137 Wooster Street, New (...) (28 years ago, 7-May-96, to lugnet.robotics.handyboard)
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| | Re: ni-cads in parallel
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Don't do this. First off, you won't get more current, nicads already can deliver gobs of current, enough to be dangerous. You want more amp-hours, not more instantaneous amperage. Secondly you will have problems with cells charging each other. I (...) (28 years ago, 6-May-96, to lugnet.robotics.handyboard)
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| | Re: ni-cads in parallel
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(...) This is generally not a problem. If you get a 7.2v strip of C-cells from a hobby store (this is a 5 cell battery) they can deliver about 150 amps for a short while. You are correct that charging NiCds in parallel has issues. I guess the (...) (28 years ago, 6-May-96, to lugnet.robotics.handyboard)
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| | using ni-cads in parallel
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Ni-cads have really low internal resistance. If the two packs start off at different levels of charge, you may have a problem with lots of current flowing between the packs when you first connect them. I'd recommend moving to a larger pack rather (...) (28 years ago, 6-May-96, to lugnet.robotics.handyboard)
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| | ni-cads in parallel
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Does anyone know anything about connecting Ni-Cad packs in parallel to get more current? I'm trying to connect two 6V packs in parallel for driving my motors and sonar, and I also need to make a 4.8 tap to drive a servo. I'm not sure how Ni-Cads in (...) (28 years ago, 6-May-96, to lugnet.robotics.handyboard)
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