 | | Re: more help, please!
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It all depends on how much you want to spend and how you want to drive them. 1) The piggy back method works, but is difficult to manage mechanically and the chips weren't designed for it. (Generally it works ok however) 2) Using a separate H-bridge (...) (27 years ago, 24-Aug-97, to lugnet.robotics.handyboard)
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| | Re: DIP switches
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you can use dip switches in the standard digital in ports if you either (a) solder them to male header first, or (b) insert them in a wire-wrap socket and then insert the wire-wrap socket pins into the HB sensor ports. both of these methods get (...) (27 years ago, 24-Aug-97, to lugnet.robotics.handyboard)
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| | Re: connecting (LEGO) motors
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all 9v LEGO motors are fine with the Handy Board. -Fred In your message you said: (...) (27 years ago, 24-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Books on bots
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A really good reference on the Motorola MC68HC11 family and microcontrollers in general is "Design with Microcontrollers" by John Peatman (ISBN 0-07-049238-7). It provides an excellent overview of the HC11 and covers the hardware and software (...) (27 years ago, 23-Aug-97, to lugnet.robotics.handyboard)
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| | more help, please!
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hello Ok, i have a question. First of all, thanks to all who helped me with my h-bridge problems. You know who you are:thanx! ok, here is my question: i have 2 motors that draw 2amps apiece. I also have a 6v 7amp lead battery. Which of these options (...) (27 years ago, 23-Aug-97, to lugnet.robotics.handyboard)
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| | DIP switch in headers
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(...) Actually, this sensor connector layout was my idea back for the Rev 2 6.270 board, and, yes, I did have both keying, and, secondarily, dip switches in mind when I designed it. However, plugging in dip switches turned out to be a bad idea, (...) (27 years ago, 23-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Board
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(...) Well if you are not using it, you could use the trim pot to drive a menu. cya! .---...---.. | Remi Desrosiers | "My Youth in Arcadia" | harlock@videotron.ca . . (27 years ago, 22-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard Expansion Board
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Actually, unless Fred has changed the way the sensor connectors work he was quite clever in that the spacing of the I/O connectors is exactly dip switch width. Basically you can plug in a DIP switch into the I/O header and get as many switches as (...) (27 years ago, 22-Aug-97, to lugnet.robotics.handyboard)
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| | Handyboard Expansion Board
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Hi folks, I know it's probably a bit too late, but couldn't you somehow add some DIP-switches to the expansion board, like the ones on the 6.270 ? This would be very nice for quickly changing the way a program works, without hanving to recompile it. (...) (27 years ago, 22-Aug-97, to lugnet.robotics.handyboard)
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| | connecting (LEGO) motors
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Hoi, I am still puzzled about connecting motors to the handyboard. I have seen plenty of motors wich draw less current then 600 mA. But still they have a couple of Amps stall current. Are the moter drivers chips protected for this ? Are all LEGO (...) (27 years ago, 22-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Books on bots
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Go to amazon.com...they have all the good robot books. (27 years ago, 22-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Books on bots
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(...) Some titles of interest would be the "Robot Builder's Bonanza"(99 Inexpensive Robotics Projects) and Mobile Robots- Inspiration to Implementation- I don't Know if they still cary it but I purchased "Sensors for Mobile Robtics" from them not (...) (27 years ago, 22-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Handyboard with EPROM
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Yes, there is a pin compatible EPROMs and EEPROMs for the Handyboard's RAM chip. However, without the RAM chip the board is limited to the 256 bytes (or 512 bytes in some versions) of on-chip RAM which can be pretty limiting. Another option is to (...) (27 years ago, 21-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Books on bots
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(...) Hello Justin, Check out the reference section of my web page at (URL) are lots of books, magazines, and other sources of information listed there along with ISBN, contact information, etc. John Whitten brat@naxs.com (27 years ago, 21-Aug-97, to lugnet.robotics.handyboard)
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| | connecting (LEGO) motors
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Hoi, I am still puzzled about connecting motors to the handyboard. I have seen plenty of motors wich draw less current then 600 mA. But still they have a couple of Amps stall current. Are the moter drivers chips protected for this ? Are all LEGO (...) (27 years ago, 21-Aug-97, to lugnet.robotics.handyboard)
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| | Re: Books on bots
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Could you post the names of any useful books you find? For that matter, can anyone else suggest some good (and affordable...) books? Particularly on elctronics in general, the 68hc11(a1), and infrared? thank you, -- Justin Kao <jkao@compuserve.com> (27 years ago, 21-Aug-97, to lugnet.robotics.handyboard)
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| | external memory
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Hi, has anyone been able to successfully added another 32k ram chip onto the handyboard? In MObile Robots, it mention that this was possible for the HC11-based boards. If so, how involve is it? (27 years ago, 21-Aug-97, to lugnet.robotics.handyboard)
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| | compile ICB files under Windows
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Hi all, it turns out that the answer for doing this has been available for two years (!) Kent Farnsworth put together a set of GNU compiler tools, Randy's modified AS11 assembler, and a DOS version of the "as11_ic" Unix shell script, all working for (...) (27 years ago, 21-Aug-97, to lugnet.robotics.handyboard)
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| | Books on bots
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Hello All, Just doing some late night web searching and found some pretty good info. I clicked on the Barnes and Noble banner add and did a search for "robotics" and needless to say I'm still going though their list on this subject! I had no idea (...) (27 years ago, 20-Aug-97, to lugnet.robotics.handyboard)
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| | Re: interfacing motors
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You can "piggyback" two 1 Amp chips. ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical Engineering The Cooper Union for the Advancement of Science and Art ---...--- (...) (27 years ago, 20-Aug-97, to lugnet.robotics.handyboard)
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