Subject:
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Re: Yup, it works.
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 3 Jun 1996 20:25:32 GMT
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Original-From:
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Fred G. Martin <fredm@SPAMCAKEmedia.mit.edu>
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Viewed:
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1535 times
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> I had a horrible time with the LEDs. The instructions weren't clear
> until I read them about three times. About 3 of my LEDs were in
> backwards. [Note to potential kit builders, the Radio Shack $8.99
> desoldering iron is worth its weight in gold! Especially when you
> want to do this type of rework]
I really tried hard to make this clear -- can you explain the
difficulty you had?
> Editorial alert: There is a typo in the instructions for building
> the interface board that claims you want to use the tantalum caps
> for it, you want to use the electrolyic 4.7uf caps. This isn't a
> big deal since the silkscreen makes this obvious.
Yup, you are right. You are either the first person to notice this,
or the first to report it!
> Also the serial
> test didn't work, (testing voltages on the serial port) since the
> voltage at pin 2 was -10v, but the voltage at pin 6 (10v) worked
> fine to illuminate the LED. This could be due to the serial LED
> being reversed.
Quiescent RS-232 levels are -10v, so the minus voltage *should*
illuminate the LED.
> I really, really, want more I/O on this thing. In particular digital
> outputs.
Noted.
> Nice build manual with pictures. It would be really nice if all of
> the pages were packaged into a single tar file I could download and
> read "offline". That way I wouldn't have to stay dialed up to work.
How about a PDF file? See
http://el.www.media.mit.edu/groups/el/projects/handy-board/techdocs/
Also, the entire HB website is periodically tarred up and available as
ftp://cherupakha.media.mit.edu/pub/projects/handy-board/hbwww.tar.gz
> Finally, I couldn't find the source to hbdl.exe and dlm.exe didn't
> work so I assume there are differences. Is the boot protocol (sans
> hardware echo) the same? If so is there a copy of bootladr.asm
> that I can use or should I re-use the one I have for the miniboard?
> I really need to have this up on my pentium since the lap top is
> not available at all times.
DLM source is at
ftp://cherupakha.media.mit.edu/pub/projects/miniboard/dlm
I didn't write HBDL, so I can't speak for the author regarding the
source.
Keep in touch...
-Fred
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Message has 1 Reply:
 | | Re: Yup, it works.
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| I didn't have any problems with the LED's - mine came with a short lead and that always went into the square pad. I imagine I missed the C15 and C16 errors (tantalum vs electrolytic) because I bought a kit and just took the parts out of the packages (...) (28 years ago, 4-Jun-96, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Yup, it works.
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| Well after much delay, I've finally got my first HandyBoard up and running. (I've got another one in parts, but that is a different story) I can confirm that HBDL.exe does *NOT* work on my 133Mhz Pentium under Windows '95. It does work on my 486/33 (...) (28 years ago, 3-Jun-96, to lugnet.robotics.handyboard)
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