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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Fri, 6 Aug 1999 21:51:21 GMT
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Original-From:
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Jacob Schultz <anne.jacob@get2net.dk#stopspammers#>
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Reply-To:
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c948605@student.dtu.&ihatespam&dk
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Viewed:
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1274 times
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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
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Message has 3 Replies:
 | | getting RCX datalog into a file
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| Is it possible to get the uploaded datalog from the RCX into a file using Rcx Command Center? (PS great work Dave and Mark!) Failing that, does someone have a *simple* (ie one which needs no interaction apart from giving a filename) Win95 prog. that (...) (25 years ago, 8-Aug-99, to lugnet.robotics)
| | | Re: I/o's expansions for the mindstorm ?
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| The mindstorm internals (very very good pages...) : (URL) 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 (...) (25 years ago, 8-Aug-99, to lugnet.robotics)
| | | Re: I/o's expansions for the mindstorm ?
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| (...) I tinkered with some multiplex schemes like this (URL) that simply connect different sensors to a single input in a fixed sequence. It workes OK for passive sensors like touch or temperature or voltage inputs. To make it work with active (...) (25 years ago, 8-Aug-99, to lugnet.robotics)
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Message is in Reply To:
| | I/o's expansions for the mindstorm ?
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| Hi! 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 (...) (25 years ago, 6-Aug-99, to lugnet.robotics)
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