ok, understood(for serout communication) (long distance comm. using serout)
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Posts: 46,084
It seems that a long cable (300 feet )
is not good for long distance communication SEROUT.
Is there and other better solution
for using SEROUT command?
Thanks, Joe
--- Allan Lane <allan.lane@h...> wrote:
> No, I would guess the HomeWork board would
> be fine. The extra 220 ohm resistors just
> give you some protection.
>
> Now, if you were recieving 'true' RS-232,
> with +- 12 volt signals, you would need a
> 22 KOhm resistor in there. However, for
> the 0 to 5 volt 232 signaling levels between
> two Stamps, the 220 resistor merely limits
> any short-circuit current between the two
> devices.
>
> It's actually needed, if you want to use the
> same pin to 'talk' and also 'listen'. If
> both Stamps tried to 'talk' at the same time,
> without the resistor there is the risk of
> burning out the pin's driver.
>
>
> --- In basicstamps@yahoogroups.com, joe terk
> <joeterk1@y...> wrote:
> > Thanks,
> >
> > It seems that the Home Work Board-Breadboard
> > isn't good for this job because they have
> > 220 ohm resistors.
> >
> > Joe
> >
> > --- Newzed@a... wrote:
> > > In a message dated 6/2/2004 5:42:52 PM Eastern
> > > Daylight Time,
> > > joeterk1@y... writes:
> > >
> > >
> > > > Thanks Sid, and do you know how many
> > > > feet of wire is the maximun for
> > > > connect one pin of the BasicStamp A, to the
> other
> > > > pin of the BasicStamp B ?
> > > >
> > > >
> > >
> > > That would be for the serout? I would think
> that
> > > with 20 ga stranded you
> > > could run 100 feet. 20 ga. has a resistance of
> > > about 1.2 ohms per hundred feet.
> > > This would give you about a 1 volt drop over
> the
> > > distance, which should
> > > leave enough to communicate with Stamp 2. I'd
> try
> > > it with 18 ga. lamp cord for a
> > > start, although that may be a bit of over kill.
> If
> > > it was me I'd go with the
> > > 18 ga.
> > >
> > > Sid
> > >
> > >
> > > [noparse][[/noparse]Non-text portions of this message have been
> > > removed]
> > >
> > >
> > >
> > > To UNSUBSCRIBE, just send mail to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > > from the same email address that you subscribed.
>
> > > Text in the Subject and Body of the message will
> be
> > > ignored.
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > > basicstamps-unsubscribe@yahoogroups.com
> > >
> > >
> > >
> >
> >
> >
> >
> >
> > __________________________________
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> > http://messenger.yahoo.com/
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>
>
>
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is not good for long distance communication SEROUT.
Is there and other better solution
for using SEROUT command?
Thanks, Joe
--- Allan Lane <allan.lane@h...> wrote:
> No, I would guess the HomeWork board would
> be fine. The extra 220 ohm resistors just
> give you some protection.
>
> Now, if you were recieving 'true' RS-232,
> with +- 12 volt signals, you would need a
> 22 KOhm resistor in there. However, for
> the 0 to 5 volt 232 signaling levels between
> two Stamps, the 220 resistor merely limits
> any short-circuit current between the two
> devices.
>
> It's actually needed, if you want to use the
> same pin to 'talk' and also 'listen'. If
> both Stamps tried to 'talk' at the same time,
> without the resistor there is the risk of
> burning out the pin's driver.
>
>
> --- In basicstamps@yahoogroups.com, joe terk
> <joeterk1@y...> wrote:
> > Thanks,
> >
> > It seems that the Home Work Board-Breadboard
> > isn't good for this job because they have
> > 220 ohm resistors.
> >
> > Joe
> >
> > --- Newzed@a... wrote:
> > > In a message dated 6/2/2004 5:42:52 PM Eastern
> > > Daylight Time,
> > > joeterk1@y... writes:
> > >
> > >
> > > > Thanks Sid, and do you know how many
> > > > feet of wire is the maximun for
> > > > connect one pin of the BasicStamp A, to the
> other
> > > > pin of the BasicStamp B ?
> > > >
> > > >
> > >
> > > That would be for the serout? I would think
> that
> > > with 20 ga stranded you
> > > could run 100 feet. 20 ga. has a resistance of
> > > about 1.2 ohms per hundred feet.
> > > This would give you about a 1 volt drop over
> the
> > > distance, which should
> > > leave enough to communicate with Stamp 2. I'd
> try
> > > it with 18 ga. lamp cord for a
> > > start, although that may be a bit of over kill.
> If
> > > it was me I'd go with the
> > > 18 ga.
> > >
> > > Sid
> > >
> > >
> > > [noparse][[/noparse]Non-text portions of this message have been
> > > removed]
> > >
> > >
> > >
> > > To UNSUBSCRIBE, just send mail to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > > from the same email address that you subscribed.
>
> > > Text in the Subject and Body of the message will
> be
> > > ignored.
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > > basicstamps-unsubscribe@yahoogroups.com
> > >
> > >
> > >
> >
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Friends. Fun. Try the all-new Yahoo! Messenger.
> > http://messenger.yahoo.com/
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed.
> Text in the Subject and Body of the message will be
> ignored.
>
> Yahoo! Groups Links
>
>
> basicstamps-unsubscribe@yahoogroups.com
>
>
>
__________________________________
Do you Yahoo!?
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http://messenger.yahoo.com/
Comments
Axelson's book, "Serial Port Complete." There may also be a couple N&V
articles available that use RS-485 line drivers. You can find those on
our web site.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: joe terk [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=_bmjsekcYEKegNFHTZxsZYoRlsK-xoQRoEJAVls7mW_f6d1jgzzvgnUGd71t5k7KN6LwUg1PLes]joeterk1@y...[/url
Sent: Thursday, June 03, 2004 2:19 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] ok, understood(for serout communication) (long
distance comm. using serout)
It seems that a long cable (300 feet )
is not good for long distance communication SEROUT.
Is there and other better solution
for using SEROUT command?
Thanks, Joe
--- Allan Lane <allan.lane@h...> wrote:
> No, I would guess the HomeWork board would
> be fine. The extra 220 ohm resistors just
> give you some protection.
>
> Now, if you were recieving 'true' RS-232,
> with +- 12 volt signals, you would need a
> 22 KOhm resistor in there. However, for
> the 0 to 5 volt 232 signaling levels between
> two Stamps, the 220 resistor merely limits
> any short-circuit current between the two
> devices.
>
> It's actually needed, if you want to use the
> same pin to 'talk' and also 'listen'. If
> both Stamps tried to 'talk' at the same time,
> without the resistor there is the risk of
> burning out the pin's driver.
>
>
> --- In basicstamps@yahoogroups.com, joe terk
> <joeterk1@y...> wrote:
> > Thanks,
> >
> > It seems that the Home Work Board-Breadboard
> > isn't good for this job because they have
> > 220 ohm resistors.
> >
> > Joe
> >
> > --- Newzed@a... wrote:
> > > In a message dated 6/2/2004 5:42:52 PM Eastern
> > > Daylight Time,
> > > joeterk1@y... writes:
> > >
> > >
> > > > Thanks Sid, and do you know how many
> > > > feet of wire is the maximun for
> > > > connect one pin of the BasicStamp A, to the
> other
> > > > pin of the BasicStamp B ?
> > > >
> > > >
> > >
> > > That would be for the serout? I would think
> that
> > > with 20 ga stranded you
> > > could run 100 feet. 20 ga. has a resistance of
> > > about 1.2 ohms per hundred feet.
> > > This would give you about a 1 volt drop over
> the
> > > distance, which should
> > > leave enough to communicate with Stamp 2. I'd
> try
> > > it with 18 ga. lamp cord for a
> > > start, although that may be a bit of over kill.
> If
> > > it was me I'd go with the
> > > 18 ga.
> > >
> > > Sid
> > >
> > >
> > > [noparse][[/noparse]Non-text portions of this message have been
> > > removed]
> > >
> > >
> > >
> > > To UNSUBSCRIBE, just send mail to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > > from the same email address that you subscribed.
>
> > > Text in the Subject and Body of the message will
> be
> > > ignored.
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > > basicstamps-unsubscribe@yahoogroups.com
> > >
> > >
> > >
> >
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Friends. Fun. Try the all-new Yahoo! Messenger.
> > http://messenger.yahoo.com/
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed.
> Text in the Subject and Body of the message will be
> ignored.
>
> Yahoo! Groups Links
>
>
> basicstamps-unsubscribe@yahoogroups.com
>
>
>
__________________________________
Do you Yahoo!?
Friends. Fun. Try the all-new Yahoo! Messenger.
http://messenger.yahoo.com/
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
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and Body of the message will be ignored.
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out to several thousand feet. Also gives simple way to network many
stamps with minimal problems.
Use 75176 chip to get from ttl to '485. Also the "Serial Port
Complete" book is well worth looking at.
E-mail me off-list if you need pieces of code to work with the
75176.
Cheers,
Tom Sisk
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> If you need to go that long then you should use a line driver. Get
Jan
> Axelson's book, "Serial Port Complete." There may also be a couple
N&V
> articles available that use RS-485 line drivers. You can find
those on
> our web site.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
>
Original Message
> From: joe terk [noparse][[/noparse]mailto:joeterk1@y...]
> Sent: Thursday, June 03, 2004 2:19 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] ok, understood(for serout communication)
(long
> distance comm. using serout)
>
>
> It seems that a long cable (300 feet )
> is not good for long distance communication SEROUT.
> Is there and other better solution
> for using SEROUT command?
>
> Thanks, Joe
>
> --- Allan Lane <allan.lane@h...> wrote:
> > No, I would guess the HomeWork board would
> > be fine. The extra 220 ohm resistors just
> > give you some protection.
> >
> > Now, if you were recieving 'true' RS-232,
> > with +- 12 volt signals, you would need a
> > 22 KOhm resistor in there. However, for
> > the 0 to 5 volt 232 signaling levels between
> > two Stamps, the 220 resistor merely limits
> > any short-circuit current between the two
> > devices.
> >
> > It's actually needed, if you want to use the
> > same pin to 'talk' and also 'listen'. If
> > both Stamps tried to 'talk' at the same time,
> > without the resistor there is the risk of
> > burning out the pin's driver.
> >
> >
> > --- In basicstamps@yahoogroups.com, joe terk
> > <joeterk1@y...> wrote:
> > > Thanks,
> > >
> > > It seems that the Home Work Board-Breadboard
> > > isn't good for this job because they have
> > > 220 ohm resistors.
> > >
> > > Joe
> > >
> > > --- Newzed@a... wrote:
> > > > In a message dated 6/2/2004 5:42:52 PM Eastern
> > > > Daylight Time,
> > > > joeterk1@y... writes:
> > > >
> > > >
> > > > > Thanks Sid, and do you know how many
> > > > > feet of wire is the maximun for
> > > > > connect one pin of the BasicStamp A, to the
> > other
> > > > > pin of the BasicStamp B ?
> > > > >
> > > > >
> > > >
> > > > That would be for the serout? I would think
> > that
> > > > with 20 ga stranded you
> > > > could run 100 feet. 20 ga. has a resistance of
> > > > about 1.2 ohms per hundred feet.
> > > > This would give you about a 1 volt drop over
> > the
> > > > distance, which should
> > > > leave enough to communicate with Stamp 2. I'd
> > try
> > > > it with 18 ga. lamp cord for a
> > > > start, although that may be a bit of over kill.
> > If
> > > > it was me I'd go with the
> > > > 18 ga.
> > > >
> > > > Sid
> > > >
> > > >
> > > > [noparse][[/noparse]Non-text portions of this message have been
> > > > removed]
> > > >
> > > >
> > > >
> > > > To UNSUBSCRIBE, just send mail to:
> > > > basicstamps-unsubscribe@yahoogroups.com
> > > > from the same email address that you subscribed.
> >
> > > > Text in the Subject and Body of the message will
> > be
> > > > ignored.
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > > basicstamps-unsubscribe@yahoogroups.com
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > > __________________________________
> > > Do you Yahoo!?
> > > Friends. Fun. Try the all-new Yahoo! Messenger.
> > > http://messenger.yahoo.com/
> >
> >
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed.
> > Text in the Subject and Body of the message will be
> > ignored.
> >
> > Yahoo! Groups Links
> >
> >
> > basicstamps-unsubscribe@yahoogroups.com
> >
> >
> >
>
>
>
>
>
> __________________________________
> Do you Yahoo!?
> Friends. Fun. Try the all-new Yahoo! Messenger.
> http://messenger.yahoo.com/
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
Subject
> and Body of the message will be ignored.
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
> This message has been scanned by WebShield. Please report SPAM to
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