Subject:
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Re: I/o's expansions for the mindstorm ?
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 8 Aug 1999 16:31:48 GMT
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Original-From:
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Philippe Jadin <PHILIPPE.JADIN@spamlessSKYNET.BE>
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Viewed:
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1555 times
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The mindstorm internals (very very good pages...) :
http://www.crynwr.com/lego-robotics/
has a section called "Communication". Here is the beginning :
"The RCX uses a 38kHz carrier, which is pretty typical for TV remotes.
As for the sampling rate, the RCX runs at 2400 bps, which makes each bit
approx 417us. Sony remotes (which aren't the fastest), use pulse widths
of 600us and 1200us, so we're in the right ball park. I think a learning
remote would do pretty well.
Peter Middlestorb reports that a learning remote does indeed work. He
used a Casio Model 1174 CMD-40 watch. "
Read the rest, and maybe with hard work it should be possible to build
some electronic with the ability to decode IR signal and use it for
I/o's
Philippe Jadin
Jacob Schultz a écrit :
>
> Philippe Jadin wrote:
>
> > Rcx has only 3 i/o's. I was wondering if anybody had made a real
> > expansion board (not fake tricks with 1 light+1switch sensor on the same
> > port. I'd be very interested byt something more complex...) with IR
> > comunication ? This could add a lot of io's and could be cheaper than
> > buying a complete new mindstorm brick...
>
> Yeah, I would really like to see such an expansion too!
> Someone was talking about an I2C bus interface, but the thread appearently
> died out - Is someone working on this?. I could also think of a "dummy RCX"
> which cannot be programmed but will respond to IR signals and have inputs and
> outputs. In this way the number of I/O could be improved (like Philippe
> suggested). Does anyone have a link to a specification of the RCX IR
> protocol? If someone does I could imagine myself puzzling with this subject.
>
> Jacob Schultz
>
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: I/o's expansions for the mindstorm ?
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| (...) This might not be relevant for everyone out there, but I thought I'd point out: If you use a learning remote to learn the codes from the MindStorms remote control, please note that all combinations of the three motor controls send out a (...) (25 years ago, 10-Aug-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: I/o's expansions for the mindstorm ?
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| (...) Yeah, I would really like to see such an expansion too! Someone was talking about an I2C bus interface, but the thread appearently died out - Is someone working on this?. I could also think of a "dummy RCX" which cannot be programmed but will (...) (25 years ago, 6-Aug-99, to lugnet.robotics)
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