Subject:
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RE: Serial Infrared Tower
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 14 Feb 2003 17:32:14 GMT
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Original-From:
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Rob Limbaugh <rlimbaugh@greenfieldgroup.(NoMoreSpam)com>
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Viewed:
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2389 times
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Yes, a 555 monostable circuit could be used.
My WIRRL project (http://abs-robotics.com/projects/wirrl.htm) is being based
around a 555 for power consumption reasons.
As I mentioned earlier, if a phototransistor was used as the IR detector, then
one could pulse the IR LED's directly from a port through a high-speed/power
transistor. This would allow all protocols and carrier wave creation/detection
to be handled through softare.
The end result would be a device that uses minimal parts and can communicate
with virtually anything from one "IR port", as long as the sample/playback
frequencies were high enough.
IR Receiver: http://www.manoweb.com/alesan/lirc/circuit.html
IR Transmitter: http://www.lirc.org/improved_transmitter.html
Software:
http://www.lirc.org/software.html
> -----Original Message-----
> From: John Gentilin [mailto:gentijo@eyecatching.com]
> Sent: Friday, February 14, 2003 11:29 AM
> To: lego-robotics@crynwr.com
> Subject: Re: Serial Infrared Tower
>
>
> Never though of using an 8 pin uC to do modulation, part is kind
> of expensive though. There is a circuit floating around by John Barnes
> that does it with a 555 timer, much cheaper. I have a modified version
> that is compatible with uC output (i.e. before inversion) if
> anyone is
> interested. It uses a few too many discrete parts as it
> stands but works
> like a champ
>
> -John G
>
> Rob Limbaugh wrote:
>
> > http://www.rentron.com/Files/TX-IR.pdf
> >
> > Substitute the TSOP-1140 for TSOP-1138. The Max232 chip • can be obtained as a free sample from www.maxim-ic.com
> >
> > All the remaining parts are items that can be ordered right • off Reynold's Electronics website (http://www.rentron.com)
> >
> > A better solution would be one where a daughterboard uses a
> couple I/O lines on the JCX and the carrier wave is generated
> on the fly. This would allow one to write programs for the
> JCX that could not only control an RCX, but also any consumer
> IR device. The phototrans could be used to record custom
> signals like a learning remote.
> >
> > > -----Original Message-----
> > > From: Bruce Boyes [mailto:bboyes@systronix.com]
> > > Sent: Thursday, February 13, 2003 2:29 PM
> > > To: Steve Karg; lego-robotics@crynwr.com
> > > Subject: Re: Serial Infrared Tower
> > >
> > >
> > > At 05:33 PM 2/12/2003 -0500, Steve Karg wrote:
> > > > Greetings!
> > > >
> > > > I have a USB infrared tower that came with the Mindstorm • kit, and recently
> > > > got an older laptop without USB (for free). I haven't seen • the RS-232
> > > > infrared towers for sale, and was wondering if anyone has • made a serial
> > > > circuit that mimics the tower that I can make for use on • the laptop?
> > >
> > > Rob Limbaugh was just communicating with me about that. It
> > > should be pretty
> > > easy, and I think some of the Lego references have schematics
> > > or at least a
> > > description. However I just looked and couldn't find them.
> > >
> > > We'd like to see such a circuit from JCX so that a JCX can
> > > talk IR to the RCX.
> > >
> > > We will give a $100 gift certificate to someone who produces
> > > a working design.
> > >
> > > Bruce
> > >
> > >
> > > ------- WWW.SYSTRONIX.COM ----------
> > > Real embedded Java and much more
> > > High speed 8051 systems
> > > +1-801-534-1017 Salt Lake City, USA
> > >
> > >
> > >
>
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