Rf transmission
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Posts: 46,084
If i may insert a word of caution.
Using a antenna on a hobby tranmitter such as being discussed can lead
you down the rosie path to big trouble.
The 434 mhz frequency is in the amateur radio (ham) band and (1) must
accept "all" interference from licensed users and (2) can not give
"any" interference to licensed users. Hams usually run 50 watts or
more on those frequencys including wideband tv.
Also there are certain quite zones concerning the 400-450 mhz band in
the u.s.a in which if violated will bring down fcc and other agencys
on your head immeadiatly. New mexico area and west virginia must be
extremely carefull.
If a complaint is registered with the fcc and they can can and will
find you then they can confiscate all of your associated equipment.
I would suggest that you might consider using multiple transeivers in
the areas needing coverage if that is possible.
73
spence
k4kep ex w9qni
Using a antenna on a hobby tranmitter such as being discussed can lead
you down the rosie path to big trouble.
The 434 mhz frequency is in the amateur radio (ham) band and (1) must
accept "all" interference from licensed users and (2) can not give
"any" interference to licensed users. Hams usually run 50 watts or
more on those frequencys including wideband tv.
Also there are certain quite zones concerning the 400-450 mhz band in
the u.s.a in which if violated will bring down fcc and other agencys
on your head immeadiatly. New mexico area and west virginia must be
extremely carefull.
If a complaint is registered with the fcc and they can can and will
find you then they can confiscate all of your associated equipment.
I would suggest that you might consider using multiple transeivers in
the areas needing coverage if that is possible.
73
spence
k4kep ex w9qni
Comments
and the receiver on a bs1. I used to be able to transmit data, then I
left the system alone for a week and now it doesn't transfer
information via rf anymore. The only time I receive information at
the receiver end is right when I power up the bs2sx (transmitter
attached) or when I tap either the transmitter or receiver antenna
with my fingers. But all that gets transfered when I do any of the
above things is 255 255 255 or 0 0 0 (depending on if I have it set
to true or inverted transmission).
So it sounds like the transmitter isn't working, right? Is there a
way I could hook up leds or somehow see if the transmitter is
transmitting data? Does anyone have any other suggestions? Thanks.
sounds like you have a near dead battery! You need to check that rf is
being transmitted first of all. You need a device to detect rf. You could
use a scanner or even a simple diode attached to an antenna wire feeding a
sensitive meter or even an oscilloscope. To build a simple rf probe, attach
one end of a wire aprox 5.5 inches long to the anode of a 1N4148 diode.
Attach the other lead of the diode (cathode) to the + terminal of a uA
meter. Across the meter, attach a 470 pF capacitor. Connect the - lead of
the meter to another 5.5 inch wire. Arrange the wires like a dipole and
while holding the meter case, trigger the rf from the transmitter and you
should see an indication on the meter that should increase as you get nearer
the transmitter and decrease as you move away. It's crude and only gives
relative indications, but it works when nothing else is available. If you
see rf being produced, then you can concentrate on finding data troubles.
Jim
http://www.geocities.com/jimforkin2003/
Original Message
From: Sam [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=59CJjBhh1bHMMyV0MJ1npFtGxdPSU6FtNDSImu4KJx3Kxi99JQRbOeeHD-RIVwNOI1ABto0UXaDt]hard-on@t...[/url
Sent: Wednesday, April 30, 2003 2:05 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] rf transmission
Hi, I have an rws/tws-434 pair. I have the transmitter on the bas2sx
and the receiver on a bs1. I used to be able to transmit data, then I
left the system alone for a week and now it doesn't transfer
information via rf anymore. The only time I receive information at
the receiver end is right when I power up the bs2sx (transmitter
attached) or when I tap either the transmitter or receiver antenna
with my fingers. But all that gets transfered when I do any of the
above things is 255 255 255 or 0 0 0 (depending on if I have it set
to true or inverted transmission).
So it sounds like the transmitter isn't working, right? Is there a
way I could hook up leds or somehow see if the transmitter is
transmitting data? Does anyone have any other suggestions? Thanks.
To UNSUBSCRIBE, just send mail to:
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writes:
> Sam,
> sounds like you have a near dead battery! You need to check that rf is
> being transmitted first of all. You need a device to detect rf. You
> could
> use a scanner or even a simple diode attached to an antenna wire feeding a
> sensitive meter or even an oscilloscope. To build a simple rf probe,
> attach
> one end of a wire aprox 5.5 inches long to the anode of a 1N4148 diode.
> Attach the other lead of the diode (cathode) to the + terminal of a uA
> meter. Across the meter, attach a 470 pF capacitor. Connect the - lead of
> the meter to another 5.5 inch wire. Arrange the wires like a dipole and
> while holding the meter case, trigger the rf from the transmitter and you
> should see an indication on the meter that should increase as you get
> nearer
> the transmitter and decrease as you move away. It's crude and only gives
> relative indications, but it works when nothing else is available. If you
> see rf being produced, then you can concentrate on finding data troubles.
I know almost nothing about RF....but, could you also use a cheap hand held
AM transistor radio to detect the RF?
[noparse][[/noparse]Non-text portions of this message have been removed]
Jonathan
Original Message
From: <smartdim@a...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, May 01, 2003 7:57 AM
Subject: Re: [noparse][[/noparse]basicstamps] rf transmission
> In a message dated 5/1/2003 7:53:52 AM Pacific Daylight Time,
jjf@p...
> writes:
>
> > Sam,
> > sounds like you have a near dead battery! You need to check that rf is
> > being transmitted first of all. You need a device to detect rf. You
> > could
> > use a scanner or even a simple diode attached to an antenna wire feeding
a
> > sensitive meter or even an oscilloscope. To build a simple rf probe,
> > attach
> > one end of a wire aprox 5.5 inches long to the anode of a 1N4148 diode.
> > Attach the other lead of the diode (cathode) to the + terminal of a uA
> > meter. Across the meter, attach a 470 pF capacitor. Connect the - lead
of
> > the meter to another 5.5 inch wire. Arrange the wires like a dipole and
> > while holding the meter case, trigger the rf from the transmitter and
you
> > should see an indication on the meter that should increase as you get
> > nearer
> > the transmitter and decrease as you move away. It's crude and only
gives
> > relative indications, but it works when nothing else is available. If
you
> > see rf being produced, then you can concentrate on finding data
troubles.
>
> I know almost nothing about RF....but, could you also use a cheap hand
held
> AM transistor radio to detect the RF?
>
>
> [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.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
I'm using an ac-dc adaptor for both basic stamps (transmitter
connected to a bs2sx, receiver connected to a bs1), so power is not
an issue.
I increased the antenna size and now I'm getting a stream of 0s
received at the receiver whenever the transmitter/bs2sx is on. I get
nothing at the receiver when the transmitter/bs2sx is turned off. So
it seems that 0s are indeed being sent from the transmitter to the
receiver, but I can't send any other numbers.
I've tried using the linear and serial outputs of the receiver, and
I've checked the antenna connections. I've tried different resistor
values between the receiver output and the basic stamp (including no
resistor), and none of it makes a difference.
--- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> Sam,
> sounds like you have a near dead battery! You need to check that
rf is
> being transmitted first of all. You need a device to detect rf.
You could
> use a scanner or even a simple diode attached to an antenna wire
feeding a
> sensitive meter or even an oscilloscope. To build a simple rf
probe, attach
> one end of a wire aprox 5.5 inches long to the anode of a 1N4148
diode.
> Attach the other lead of the diode (cathode) to the + terminal of a
uA
> meter. Across the meter, attach a 470 pF capacitor. Connect the -
lead of
> the meter to another 5.5 inch wire. Arrange the wires like a
dipole and
> while holding the meter case, trigger the rf from the transmitter
and you
> should see an indication on the meter that should increase as you
get nearer
> the transmitter and decrease as you move away. It's crude and only
gives
> relative indications, but it works when nothing else is available.
If you
> see rf being produced, then you can concentrate on finding data
troubles.
>
> Jim
> http://www.geocities.com/jimforkin2003/
>
>
Original Message
> From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> Sent: Wednesday, April 30, 2003 2:05 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] rf transmission
>
>
> Hi, I have an rws/tws-434 pair. I have the transmitter on the bas2sx
> and the receiver on a bs1. I used to be able to transmit data, then
I
> left the system alone for a week and now it doesn't transfer
> information via rf anymore. The only time I receive information at
> the receiver end is right when I power up the bs2sx (transmitter
> attached) or when I tap either the transmitter or receiver antenna
> with my fingers. But all that gets transfered when I do any of the
> above things is 255 255 255 or 0 0 0 (depending on if I have it set
> to true or inverted transmission).
> So it sounds like the transmitter isn't working, right? Is there a
> way I could hook up leds or somehow see if the transmitter is
> transmitting data? Does anyone have any other suggestions? Thanks.
>
>
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
between your sx and bs1 does the info transfer ??
1. are you sending at 2400 ( real good place to start )
2. are your modes matched and are they both inverted
3. sx has different mode values I think
Larry Gaminde
Original Message
From: "Sam" <hard-on@t...>
To: <basicstamps@yahoogroups.com>
Sent: May 01, 2003 8:39 AM
Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
> Progress(but still not working):
> I'm using an ac-dc adaptor for both basic stamps (transmitter
> connected to a bs2sx, receiver connected to a bs1), so power is not
> an issue.
> I increased the antenna size and now I'm getting a stream of 0s
> received at the receiver whenever the transmitter/bs2sx is on. I get
> nothing at the receiver when the transmitter/bs2sx is turned off. So
> it seems that 0s are indeed being sent from the transmitter to the
> receiver, but I can't send any other numbers.
> I've tried using the linear and serial outputs of the receiver, and
> I've checked the antenna connections. I've tried different resistor
> values between the receiver output and the basic stamp (including no
> resistor), and none of it makes a difference.
>
> --- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> > Sam,
> > sounds like you have a near dead battery! You need to check that
> rf is
> > being transmitted first of all. You need a device to detect rf.
> You could
> > use a scanner or even a simple diode attached to an antenna wire
> feeding a
> > sensitive meter or even an oscilloscope. To build a simple rf
> probe, attach
> > one end of a wire aprox 5.5 inches long to the anode of a 1N4148
> diode.
> > Attach the other lead of the diode (cathode) to the + terminal of a
> uA
> > meter. Across the meter, attach a 470 pF capacitor. Connect the -
> lead of
> > the meter to another 5.5 inch wire. Arrange the wires like a
> dipole and
> > while holding the meter case, trigger the rf from the transmitter
> and you
> > should see an indication on the meter that should increase as you
> get nearer
> > the transmitter and decrease as you move away. It's crude and only
> gives
> > relative indications, but it works when nothing else is available.
> If you
> > see rf being produced, then you can concentrate on finding data
> troubles.
> >
> > Jim
> > http://www.geocities.com/jimforkin2003/
> >
> >
Original Message
> > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> > Sent: Wednesday, April 30, 2003 2:05 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] rf transmission
> >
> >
> > Hi, I have an rws/tws-434 pair. I have the transmitter on the bas2sx
> > and the receiver on a bs1. I used to be able to transmit data, then
> I
> > left the system alone for a week and now it doesn't transfer
> > information via rf anymore. The only time I receive information at
> > the receiver end is right when I power up the bs2sx (transmitter
> > attached) or when I tap either the transmitter or receiver antenna
> > with my fingers. But all that gets transfered when I do any of the
> > above things is 255 255 255 or 0 0 0 (depending on if I have it set
> > to true or inverted transmission).
> > So it sounds like the transmitter isn't working, right? Is there a
> > way I could hook up leds or somehow see if the transmitter is
> > transmitting data? Does anyone have any other suggestions? Thanks.
> >
> >
> >
> >
> > 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.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
on a computer you may have to use a rs232 to ttl
converter fire up a terminal program at least you
will see exactly what is going in and whats comming
out then hook the stamps up one at a time.
--- Sam <hard-on@t...> wrote:
> Progress(but still not working):
> I'm using an ac-dc adaptor for both basic stamps
> (transmitter
> connected to a bs2sx, receiver connected to a bs1),
> so power is not
> an issue.
> I increased the antenna size and now I'm getting a
> stream of 0s
> received at the receiver whenever the
> transmitter/bs2sx is on. I get
> nothing at the receiver when the transmitter/bs2sx
> is turned off. So
> it seems that 0s are indeed being sent from the
> transmitter to the
> receiver, but I can't send any other numbers.
> I've tried using the linear and serial outputs of
> the receiver, and
> I've checked the antenna connections. I've tried
> different resistor
> values between the receiver output and the basic
> stamp (including no
> resistor), and none of it makes a difference.
>
> --- In basicstamps@yahoogroups.com, "Jim Forkin"
> <jjf@p...> wrote:
> > Sam,
> > sounds like you have a near dead battery! You
> need to check that
> rf is
> > being transmitted first of all. You need a
> device to detect rf.
> You could
> > use a scanner or even a simple diode attached to
> an antenna wire
> feeding a
> > sensitive meter or even an oscilloscope. To build
> a simple rf
> probe, attach
> > one end of a wire aprox 5.5 inches long to the
> anode of a 1N4148
> diode.
> > Attach the other lead of the diode (cathode) to
> the + terminal of a
> uA
> > meter. Across the meter, attach a 470 pF
> capacitor. Connect the -
> lead of
> > the meter to another 5.5 inch wire. Arrange the
> wires like a
> dipole and
> > while holding the meter case, trigger the rf from
> the transmitter
> and you
> > should see an indication on the meter that should
> increase as you
> get nearer
> > the transmitter and decrease as you move away.
> It's crude and only
> gives
> > relative indications, but it works when nothing
> else is available.
> If you
> > see rf being produced, then you can concentrate on
> finding data
> troubles.
> >
> > Jim
> > http://www.geocities.com/jimforkin2003/
> >
> >
Original Message
> > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> > Sent: Wednesday, April 30, 2003 2:05 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] rf transmission
> >
> >
> > Hi, I have an rws/tws-434 pair. I have the
> transmitter on the bas2sx
> > and the receiver on a bs1. I used to be able to
> transmit data, then
> I
> > left the system alone for a week and now it
> doesn't transfer
> > information via rf anymore. The only time I
> receive information at
> > the receiver end is right when I power up the
> bs2sx (transmitter
> > attached) or when I tap either the transmitter or
> receiver antenna
> > with my fingers. But all that gets transfered when
> I do any of the
> > above things is 255 255 255 or 0 0 0 (depending on
> if I have it set
> > to true or inverted transmission).
> > So it sounds like the transmitter isn't working,
> right? Is there a
> > way I could hook up leds or somehow see if the
> transmitter is
> > transmitting data? Does anyone have any other
> suggestions? Thanks.
> >
> >
> >
> >
> > 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.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
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Sounds like it might be baud rates or something. Make sure that you look up
the correct number, the 2sx is different for the BS2, which is what the
sample code for the unit uses, I think.
Jonathan
www.madlabs.info
Original Message
From: "Sam" <hard-on@t...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, May 01, 2003 8:39 AM
Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
> Progress(but still not working):
> I'm using an ac-dc adaptor for both basic stamps (transmitter
> connected to a bs2sx, receiver connected to a bs1), so power is not
> an issue.
> I increased the antenna size and now I'm getting a stream of 0s
> received at the receiver whenever the transmitter/bs2sx is on. I get
> nothing at the receiver when the transmitter/bs2sx is turned off. So
> it seems that 0s are indeed being sent from the transmitter to the
> receiver, but I can't send any other numbers.
> I've tried using the linear and serial outputs of the receiver, and
> I've checked the antenna connections. I've tried different resistor
> values between the receiver output and the basic stamp (including no
> resistor), and none of it makes a difference.
>
> --- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> > Sam,
> > sounds like you have a near dead battery! You need to check that
> rf is
> > being transmitted first of all. You need a device to detect rf.
> You could
> > use a scanner or even a simple diode attached to an antenna wire
> feeding a
> > sensitive meter or even an oscilloscope. To build a simple rf
> probe, attach
> > one end of a wire aprox 5.5 inches long to the anode of a 1N4148
> diode.
> > Attach the other lead of the diode (cathode) to the + terminal of a
> uA
> > meter. Across the meter, attach a 470 pF capacitor. Connect the -
> lead of
> > the meter to another 5.5 inch wire. Arrange the wires like a
> dipole and
> > while holding the meter case, trigger the rf from the transmitter
> and you
> > should see an indication on the meter that should increase as you
> get nearer
> > the transmitter and decrease as you move away. It's crude and only
> gives
> > relative indications, but it works when nothing else is available.
> If you
> > see rf being produced, then you can concentrate on finding data
> troubles.
> >
> > Jim
> > http://www.geocities.com/jimforkin2003/
> >
> >
Original Message
> > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> > Sent: Wednesday, April 30, 2003 2:05 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] rf transmission
> >
> >
> > Hi, I have an rws/tws-434 pair. I have the transmitter on the bas2sx
> > and the receiver on a bs1. I used to be able to transmit data, then
> I
> > left the system alone for a week and now it doesn't transfer
> > information via rf anymore. The only time I receive information at
> > the receiver end is right when I power up the bs2sx (transmitter
> > attached) or when I tap either the transmitter or receiver antenna
> > with my fingers. But all that gets transfered when I do any of the
> > above things is 255 255 255 or 0 0 0 (depending on if I have it set
> > to true or inverted transmission).
> > So it sounds like the transmitter isn't working, right? Is there a
> > way I could hook up leds or somehow see if the transmitter is
> > transmitting data? Does anyone have any other suggestions? Thanks.
> >
> >
> >
> >
> > 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.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
resistor because I read it was only needed if you send data
inverted). I then monitored the bs1's input, it got nothing until the
bs2sx was turned on. when the bs2sx was turned on, the bs1 kept
getting 255's (true) or 0's (inverted) even though the bs2sx was
sending the numbers 50 and 180. I used both 2400 and 600 baud rates,
same thing for both. This is bizarre... I'm making sure that the baud
rates are the same on both stamps (different codes for each) and that
they are both true or inverted...
--- In basicstamps@yahoogroups.com, "Larry Gaminde" <lgaminde@t...>
wrote:
> One step at a time, if you remove the TX and RX units hook a 10k
resistor
> between your sx and bs1 does the info transfer ??
>
> 1. are you sending at 2400 ( real good place to start )
> 2. are your modes matched and are they both inverted
> 3. sx has different mode values I think
>
> Larry Gaminde
>
>
>
Original Message
> From: "Sam" <hard-on@t...>
> To: <basicstamps@yahoogroups.com>
> Sent: May 01, 2003 8:39 AM
> Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
>
>
> > Progress(but still not working):
> > I'm using an ac-dc adaptor for both basic stamps (transmitter
> > connected to a bs2sx, receiver connected to a bs1), so power is
not
> > an issue.
> > I increased the antenna size and now I'm getting a stream of 0s
> > received at the receiver whenever the transmitter/bs2sx is on. I
get
> > nothing at the receiver when the transmitter/bs2sx is turned off.
So
> > it seems that 0s are indeed being sent from the transmitter to the
> > receiver, but I can't send any other numbers.
> > I've tried using the linear and serial outputs of the receiver,
and
> > I've checked the antenna connections. I've tried different
resistor
> > values between the receiver output and the basic stamp (including
no
> > resistor), and none of it makes a difference.
> >
> > --- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> > > Sam,
> > > sounds like you have a near dead battery! You need to check
that
> > rf is
> > > being transmitted first of all. You need a device to detect
rf.
> > You could
> > > use a scanner or even a simple diode attached to an antenna wire
> > feeding a
> > > sensitive meter or even an oscilloscope. To build a simple rf
> > probe, attach
> > > one end of a wire aprox 5.5 inches long to the anode of a 1N4148
> > diode.
> > > Attach the other lead of the diode (cathode) to the + terminal
of a
> > uA
> > > meter. Across the meter, attach a 470 pF capacitor. Connect
the -
> > lead of
> > > the meter to another 5.5 inch wire. Arrange the wires like a
> > dipole and
> > > while holding the meter case, trigger the rf from the
transmitter
> > and you
> > > should see an indication on the meter that should increase as
you
> > get nearer
> > > the transmitter and decrease as you move away. It's crude and
only
> > gives
> > > relative indications, but it works when nothing else is
available.
> > If you
> > > see rf being produced, then you can concentrate on finding data
> > troubles.
> > >
> > > Jim
> > > http://www.geocities.com/jimforkin2003/
> > >
> > >
Original Message
> > > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> > > Sent: Wednesday, April 30, 2003 2:05 PM
> > > To: basicstamps@yahoogroups.com
> > > Subject: [noparse][[/noparse]basicstamps] rf transmission
> > >
> > >
> > > Hi, I have an rws/tws-434 pair. I have the transmitter on the
bas2sx
> > > and the receiver on a bs1. I used to be able to transmit data,
then
> > I
> > > left the system alone for a week and now it doesn't transfer
> > > information via rf anymore. The only time I receive information
at
> > > the receiver end is right when I power up the bs2sx (transmitter
> > > attached) or when I tap either the transmitter or receiver
antenna
> > > with my fingers. But all that gets transfered when I do any of
the
> > > above things is 255 255 255 or 0 0 0 (depending on if I have it
set
> > > to true or inverted transmission).
> > > So it sounds like the transmitter isn't working, right? Is
there a
> > > way I could hook up leds or somehow see if the transmitter is
> > > transmitting data? Does anyone have any other suggestions?
Thanks.
> > >
> > >
> > >
> > >
> > > 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.
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
> > 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.
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
1. USE THE 10k . ( what if you hooked things up wrong even just for a
second)
2. Stick with the inverted only .
3. program simple serial out and in instructions, using something like below
and the bs1 connected to the computer using serial in and DEBUG (never
used a bs1 is this possable) .
for i = 0 to 255
serout 1,2,3, [noparse][[/noparse]i]
pause 700
next i
Larry Gaminde
Original Message
From: "Sam" <hard-on@t...>
To: <basicstamps@yahoogroups.com>
Sent: May 01, 2003 11:18 AM
Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
> I connected a bs2sx output pin directly to a bs1 input pin (no 10k
> resistor because I read it was only needed if you send data
> inverted). I then monitored the bs1's input, it got nothing until the
> bs2sx was turned on. when the bs2sx was turned on, the bs1 kept
> getting 255's (true) or 0's (inverted) even though the bs2sx was
> sending the numbers 50 and 180. I used both 2400 and 600 baud rates,
> same thing for both. This is bizarre... I'm making sure that the baud
> rates are the same on both stamps (different codes for each) and that
> they are both true or inverted...
>
> --- In basicstamps@yahoogroups.com, "Larry Gaminde" <lgaminde@t...>
> wrote:
> > One step at a time, if you remove the TX and RX units hook a 10k
> resistor
> > between your sx and bs1 does the info transfer ??
> >
> > 1. are you sending at 2400 ( real good place to start )
> > 2. are your modes matched and are they both inverted
> > 3. sx has different mode values I think
> >
> > Larry Gaminde
> >
> >
> >
Original Message
> > From: "Sam" <hard-on@t...>
> > To: <basicstamps@yahoogroups.com>
> > Sent: May 01, 2003 8:39 AM
> > Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
> >
> >
> > > Progress(but still not working):
> > > I'm using an ac-dc adaptor for both basic stamps (transmitter
> > > connected to a bs2sx, receiver connected to a bs1), so power is
> not
> > > an issue.
> > > I increased the antenna size and now I'm getting a stream of 0s
> > > received at the receiver whenever the transmitter/bs2sx is on. I
> get
> > > nothing at the receiver when the transmitter/bs2sx is turned off.
> So
> > > it seems that 0s are indeed being sent from the transmitter to the
> > > receiver, but I can't send any other numbers.
> > > I've tried using the linear and serial outputs of the receiver,
> and
> > > I've checked the antenna connections. I've tried different
> resistor
> > > values between the receiver output and the basic stamp (including
> no
> > > resistor), and none of it makes a difference.
> > >
> > > --- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> > > > Sam,
> > > > sounds like you have a near dead battery! You need to check
> that
> > > rf is
> > > > being transmitted first of all. You need a device to detect
> rf.
> > > You could
> > > > use a scanner or even a simple diode attached to an antenna wire
> > > feeding a
> > > > sensitive meter or even an oscilloscope. To build a simple rf
> > > probe, attach
> > > > one end of a wire aprox 5.5 inches long to the anode of a 1N4148
> > > diode.
> > > > Attach the other lead of the diode (cathode) to the + terminal
> of a
> > > uA
> > > > meter. Across the meter, attach a 470 pF capacitor. Connect
> the -
> > > lead of
> > > > the meter to another 5.5 inch wire. Arrange the wires like a
> > > dipole and
> > > > while holding the meter case, trigger the rf from the
> transmitter
> > > and you
> > > > should see an indication on the meter that should increase as
> you
> > > get nearer
> > > > the transmitter and decrease as you move away. It's crude and
> only
> > > gives
> > > > relative indications, but it works when nothing else is
> available.
> > > If you
> > > > see rf being produced, then you can concentrate on finding data
> > > troubles.
> > > >
> > > > Jim
> > > > http://www.geocities.com/jimforkin2003/
> > > >
> > > >
Original Message
> > > > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> > > > Sent: Wednesday, April 30, 2003 2:05 PM
> > > > To: basicstamps@yahoogroups.com
> > > > Subject: [noparse][[/noparse]basicstamps] rf transmission
> > > >
> > > >
> > > > Hi, I have an rws/tws-434 pair. I have the transmitter on the
> bas2sx
> > > > and the receiver on a bs1. I used to be able to transmit data,
> then
> > > I
> > > > left the system alone for a week and now it doesn't transfer
> > > > information via rf anymore. The only time I receive information
> at
> > > > the receiver end is right when I power up the bs2sx (transmitter
> > > > attached) or when I tap either the transmitter or receiver
> antenna
> > > > with my fingers. But all that gets transfered when I do any of
> the
> > > > above things is 255 255 255 or 0 0 0 (depending on if I have it
> set
> > > > to true or inverted transmission).
> > > > So it sounds like the transmitter isn't working, right? Is
> there a
> > > > way I could hook up leds or somehow see if the transmitter is
> > > > transmitting data? Does anyone have any other suggestions?
> Thanks.
> > > >
> > > >
> > > >
> > > >
> > > > 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.
> > > >
> > > >
> > > > Your use of Yahoo! Groups is subject to
> > > http://docs.yahoo.com/info/terms/
> > >
> > >
> > > 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.
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
Use the 10k (take it from someone who has smoked more chips than
cigarettes)
Larry Gaminde
Original Message
From: "Larry Gaminde" <lgaminde@t...>
To: <basicstamps@yahoogroups.com>
Sent: May 01, 2003 11:51 AM
Subject: Re: [noparse][[/noparse]basicstamps] Re: rf transmission
> Ok you now getting to a point of finding out what is wrong
> 1. USE THE 10k . ( what if you hooked things up wrong even just for a
> second)
> 2. Stick with the inverted only .
> 3. program simple serial out and in instructions, using something like
below
> and the bs1 connected to the computer using serial in and DEBUG (never
> used a bs1 is this possable) .
>
> for i = 0 to 255
> serout 1,2,3, [noparse][[/noparse]i]
> pause 700
> next i
>
> Larry Gaminde
>
>
>
Original Message
> From: "Sam" <hard-on@t...>
> To: <basicstamps@yahoogroups.com>
> Sent: May 01, 2003 11:18 AM
> Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
>
>
> > I connected a bs2sx output pin directly to a bs1 input pin (no 10k
> > resistor because I read it was only needed if you send data
> > inverted). I then monitored the bs1's input, it got nothing until the
> > bs2sx was turned on. when the bs2sx was turned on, the bs1 kept
> > getting 255's (true) or 0's (inverted) even though the bs2sx was
> > sending the numbers 50 and 180. I used both 2400 and 600 baud rates,
> > same thing for both. This is bizarre... I'm making sure that the baud
> > rates are the same on both stamps (different codes for each) and that
> > they are both true or inverted...
> >
> > --- In basicstamps@yahoogroups.com, "Larry Gaminde" <lgaminde@t...>
> > wrote:
> > > One step at a time, if you remove the TX and RX units hook a 10k
> > resistor
> > > between your sx and bs1 does the info transfer ??
> > >
> > > 1. are you sending at 2400 ( real good place to start )
> > > 2. are your modes matched and are they both inverted
> > > 3. sx has different mode values I think
> > >
> > > Larry Gaminde
> > >
> > >
> > >
Original Message
> > > From: "Sam" <hard-on@t...>
> > > To: <basicstamps@yahoogroups.com>
> > > Sent: May 01, 2003 8:39 AM
> > > Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
> > >
> > >
> > > > Progress(but still not working):
> > > > I'm using an ac-dc adaptor for both basic stamps (transmitter
> > > > connected to a bs2sx, receiver connected to a bs1), so power is
> > not
> > > > an issue.
> > > > I increased the antenna size and now I'm getting a stream of 0s
> > > > received at the receiver whenever the transmitter/bs2sx is on. I
> > get
> > > > nothing at the receiver when the transmitter/bs2sx is turned off.
> > So
> > > > it seems that 0s are indeed being sent from the transmitter to the
> > > > receiver, but I can't send any other numbers.
> > > > I've tried using the linear and serial outputs of the receiver,
> > and
> > > > I've checked the antenna connections. I've tried different
> > resistor
> > > > values between the receiver output and the basic stamp (including
> > no
> > > > resistor), and none of it makes a difference.
> > > >
> > > > --- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
> > > > > Sam,
> > > > > sounds like you have a near dead battery! You need to check
> > that
> > > > rf is
> > > > > being transmitted first of all. You need a device to detect
> > rf.
> > > > You could
> > > > > use a scanner or even a simple diode attached to an antenna wire
> > > > feeding a
> > > > > sensitive meter or even an oscilloscope. To build a simple rf
> > > > probe, attach
> > > > > one end of a wire aprox 5.5 inches long to the anode of a 1N4148
> > > > diode.
> > > > > Attach the other lead of the diode (cathode) to the + terminal
> > of a
> > > > uA
> > > > > meter. Across the meter, attach a 470 pF capacitor. Connect
> > the -
> > > > lead of
> > > > > the meter to another 5.5 inch wire. Arrange the wires like a
> > > > dipole and
> > > > > while holding the meter case, trigger the rf from the
> > transmitter
> > > > and you
> > > > > should see an indication on the meter that should increase as
> > you
> > > > get nearer
> > > > > the transmitter and decrease as you move away. It's crude and
> > only
> > > > gives
> > > > > relative indications, but it works when nothing else is
> > available.
> > > > If you
> > > > > see rf being produced, then you can concentrate on finding data
> > > > troubles.
> > > > >
> > > > > Jim
> > > > > http://www.geocities.com/jimforkin2003/
> > > > >
> > > > >
Original Message
> > > > > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> > > > > Sent: Wednesday, April 30, 2003 2:05 PM
> > > > > To: basicstamps@yahoogroups.com
> > > > > Subject: [noparse][[/noparse]basicstamps] rf transmission
> > > > >
> > > > >
> > > > > Hi, I have an rws/tws-434 pair. I have the transmitter on the
> > bas2sx
> > > > > and the receiver on a bs1. I used to be able to transmit data,
> > then
> > > > I
> > > > > left the system alone for a week and now it doesn't transfer
> > > > > information via rf anymore. The only time I receive information
> > at
> > > > > the receiver end is right when I power up the bs2sx (transmitter
> > > > > attached) or when I tap either the transmitter or receiver
> > antenna
> > > > > with my fingers. But all that gets transfered when I do any of
> > the
> > > > > above things is 255 255 255 or 0 0 0 (depending on if I have it
> > set
> > > > > to true or inverted transmission).
> > > > > So it sounds like the transmitter isn't working, right? Is
> > there a
> > > > > way I could hook up leds or somehow see if the transmitter is
> > > > > transmitting data? Does anyone have any other suggestions?
> > Thanks.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > 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.
> > > > >
> > > > >
> > > > > Your use of Yahoo! Groups is subject to
> > > > http://docs.yahoo.com/info/terms/
> > > >
> > > >
> > > > 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.
> > > >
> > > >
> > > > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> > > >
> > > >
> >
> >
> > 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.
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
>
>
> 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.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
Big concern if you have two way serial going on... One stamp driving a 0,
one stamp driving a 1, *poof*, tons of smoke - two dead stamps - Yuk.
- Robert
Original Message
From: "Larry Gaminde" <lgaminde@t...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, May 01, 2003 12:58 PM
Subject: Re: [noparse][[/noparse]basicstamps] Re: rf transmission
| Oh by the way
| Use the 10k (take it from someone who has smoked more chips than
| cigarettes)
|
| Larry Gaminde
|
|
|
Original Message
| From: "Larry Gaminde" <lgaminde@t...>
| To: <basicstamps@yahoogroups.com>
| Sent: May 01, 2003 11:51 AM
| Subject: Re: [noparse][[/noparse]basicstamps] Re: rf transmission
|
|
| > Ok you now getting to a point of finding out what is wrong
| > 1. USE THE 10k . ( what if you hooked things up wrong even just for a
| > second)
| > 2. Stick with the inverted only .
| > 3. program simple serial out and in instructions, using something like
| below
| > and the bs1 connected to the computer using serial in and DEBUG (never
| > used a bs1 is this possable) .
| >
| > for i = 0 to 255
| > serout 1,2,3, [noparse][[/noparse]i]
| > pause 700
| > next i
| >
| > Larry Gaminde
| >
| >
| >
Original Message
| > From: "Sam" <hard-on@t...>
| > To: <basicstamps@yahoogroups.com>
| > Sent: May 01, 2003 11:18 AM
| > Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
| >
| >
| > > I connected a bs2sx output pin directly to a bs1 input pin (no 10k
| > > resistor because I read it was only needed if you send data
| > > inverted). I then monitored the bs1's input, it got nothing until the
| > > bs2sx was turned on. when the bs2sx was turned on, the bs1 kept
| > > getting 255's (true) or 0's (inverted) even though the bs2sx was
| > > sending the numbers 50 and 180. I used both 2400 and 600 baud rates,
| > > same thing for both. This is bizarre... I'm making sure that the baud
| > > rates are the same on both stamps (different codes for each) and that
| > > they are both true or inverted...
| > >
| > > --- In basicstamps@yahoogroups.com, "Larry Gaminde" <lgaminde@t...>
| > > wrote:
| > > > One step at a time, if you remove the TX and RX units hook a 10k
| > > resistor
| > > > between your sx and bs1 does the info transfer ??
| > > >
| > > > 1. are you sending at 2400 ( real good place to start )
| > > > 2. are your modes matched and are they both inverted
| > > > 3. sx has different mode values I think
| > > >
| > > > Larry Gaminde
| > > >
| > > >
| > > >
Original Message
| > > > From: "Sam" <hard-on@t...>
| > > > To: <basicstamps@yahoogroups.com>
| > > > Sent: May 01, 2003 8:39 AM
| > > > Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
| > > >
| > > >
| > > > > Progress(but still not working):
| > > > > I'm using an ac-dc adaptor for both basic stamps (transmitter
| > > > > connected to a bs2sx, receiver connected to a bs1), so power is
| > > not
| > > > > an issue.
| > > > > I increased the antenna size and now I'm getting a stream of 0s
| > > > > received at the receiver whenever the transmitter/bs2sx is on. I
| > > get
| > > > > nothing at the receiver when the transmitter/bs2sx is turned off.
| > > So
| > > > > it seems that 0s are indeed being sent from the transmitter to the
| > > > > receiver, but I can't send any other numbers.
| > > > > I've tried using the linear and serial outputs of the receiver,
| > > and
| > > > > I've checked the antenna connections. I've tried different
| > > resistor
| > > > > values between the receiver output and the basic stamp (including
| > > no
| > > > > resistor), and none of it makes a difference.
| > > > >
| > > > > --- In basicstamps@yahoogroups.com, "Jim Forkin" <jjf@p...> wrote:
| > > > > > Sam,
| > > > > > sounds like you have a near dead battery! You need to check
| > > that
| > > > > rf is
| > > > > > being transmitted first of all. You need a device to detect
| > > rf.
| > > > > You could
| > > > > > use a scanner or even a simple diode attached to an antenna wire
| > > > > feeding a
| > > > > > sensitive meter or even an oscilloscope. To build a simple rf
| > > > > probe, attach
| > > > > > one end of a wire aprox 5.5 inches long to the anode of a 1N4148
| > > > > diode.
| > > > > > Attach the other lead of the diode (cathode) to the + terminal
| > > of a
| > > > > uA
| > > > > > meter. Across the meter, attach a 470 pF capacitor. Connect
| > > the -
| > > > > lead of
| > > > > > the meter to another 5.5 inch wire. Arrange the wires like a
| > > > > dipole and
| > > > > > while holding the meter case, trigger the rf from the
| > > transmitter
| > > > > and you
| > > > > > should see an indication on the meter that should increase as
| > > you
| > > > > get nearer
| > > > > > the transmitter and decrease as you move away. It's crude and
| > > only
| > > > > gives
| > > > > > relative indications, but it works when nothing else is
| > > available.
| > > > > If you
| > > > > > see rf being produced, then you can concentrate on finding data
| > > > > troubles.
| > > > > >
| > > > > > Jim
| > > > > > http://www.geocities.com/jimforkin2003/
| > > > > >
| > > > > >
Original Message
| > > > > > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
| > > > > > Sent: Wednesday, April 30, 2003 2:05 PM
| > > > > > To: basicstamps@yahoogroups.com
| > > > > > Subject: [noparse][[/noparse]basicstamps] rf transmission
| > > > > >
| > > > > >
| > > > > > Hi, I have an rws/tws-434 pair. I have the transmitter on the
| > > bas2sx
| > > > > > and the receiver on a bs1. I used to be able to transmit data,
| > > then
| > > > > I
| > > > > > left the system alone for a week and now it doesn't transfer
| > > > > > information via rf anymore. The only time I receive information
| > > at
| > > > > > the receiver end is right when I power up the bs2sx (transmitter
| > > > > > attached) or when I tap either the transmitter or receiver
| > > antenna
| > > > > > with my fingers. But all that gets transfered when I do any of
| > > the
| > > > > > above things is 255 255 255 or 0 0 0 (depending on if I have it
| > > set
| > > > > > to true or inverted transmission).
| > > > > > So it sounds like the transmitter isn't working, right? Is
| > > there a
| > > > > > way I could hook up leds or somehow see if the transmitter is
| > > > > > transmitting data? Does anyone have any other suggestions?
| > > Thanks.
| > > > > >
| > > > > >
| > > > > >
| > > > > >
| > > > > > 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.
| > > > > >
| > > > > >
| > > > > > Your use of Yahoo! Groups is subject to
| > > > > http://docs.yahoo.com/info/terms/
| > > > >
| > > > >
| > > > > 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.
| > > > >
| > > > >
| > > > > Your use of Yahoo! Groups is subject to
| > > http://docs.yahoo.com/info/terms/
| > > > >
| > > > >
| > >
| > >
| > > 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.
| > >
| > >
| > > Your use of Yahoo! Groups is subject to
| http://docs.yahoo.com/info/terms/
| > >
| > >
| >
| >
| > 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.
| >
| >
| > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
| >
| >
|
|
| 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.
|
|
| Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
|
|
trying to keep the current below 20 mA, which
is within the Stamp's pin limit.
When doing bi-directional comm on one pin,
there will almost ALWAYS be times when one just
stopped talking, and the other one now wants
to start talking, and drives the pin before
the other lets go.
--- In basicstamps@yahoogroups.com, "Robert Ussery" <uavscience@f...>
wrote:
> Is the 10k mostly to prevent excess current from a bus fight?
> Big concern if you have two way serial going on... One stamp
driving a 0,
> one stamp driving a 1, *poof*, tons of smoke - two dead stamps -
Yuk.
>
> - Robert
>
>
>
Original Message
> From: "Larry Gaminde" <lgaminde@t...>
> To: <basicstamps@yahoogroups.com>
> Sent: Thursday, May 01, 2003 12:58 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Re: rf transmission
>
>
> | Oh by the way
> | Use the 10k (take it from someone who has smoked more chips than
> | cigarettes)
> |
> | Larry Gaminde
> |
> |
> |
Original Message
> | From: "Larry Gaminde" <lgaminde@t...>
> | To: <basicstamps@yahoogroups.com>
> | Sent: May 01, 2003 11:51 AM
> | Subject: Re: [noparse][[/noparse]basicstamps] Re: rf transmission
> |
> |
> | > Ok you now getting to a point of finding out what is wrong
> | > 1. USE THE 10k . ( what if you hooked things up wrong even
just for a
> | > second)
> | > 2. Stick with the inverted only .
> | > 3. program simple serial out and in instructions, using
something like
> | below
> | > and the bs1 connected to the computer using serial in and
DEBUG (never
> | > used a bs1 is this possable) .
> | >
> | > for i = 0 to 255
> | > serout 1,2,3, [noparse][[/noparse]i]
> | > pause 700
> | > next i
> | >
> | > Larry Gaminde
> | >
> | >
> | >
Original Message
> | > From: "Sam" <hard-on@t...>
> | > To: <basicstamps@yahoogroups.com>
> | > Sent: May 01, 2003 11:18 AM
> | > Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
> | >
> | >
> | > > I connected a bs2sx output pin directly to a bs1 input pin
(no 10k
> | > > resistor because I read it was only needed if you send data
> | > > inverted). I then monitored the bs1's input, it got nothing
until the
> | > > bs2sx was turned on. when the bs2sx was turned on, the bs1
kept
> | > > getting 255's (true) or 0's (inverted) even though the bs2sx
was
> | > > sending the numbers 50 and 180. I used both 2400 and 600 baud
rates,
> | > > same thing for both. This is bizarre... I'm making sure that
the baud
> | > > rates are the same on both stamps (different codes for each)
and that
> | > > they are both true or inverted...
> | > >
> | > > --- In basicstamps@yahoogroups.com, "Larry Gaminde"
<lgaminde@t...>
> | > > wrote:
> | > > > One step at a time, if you remove the TX and RX units hook
a 10k
> | > > resistor
> | > > > between your sx and bs1 does the info transfer ??
> | > > >
> | > > > 1. are you sending at 2400 ( real good place to start )
> | > > > 2. are your modes matched and are they both inverted
> | > > > 3. sx has different mode values I think
> | > > >
> | > > > Larry Gaminde
> | > > >
> | > > >
> | > > >
Original Message
> | > > > From: "Sam" <hard-on@t...>
> | > > > To: <basicstamps@yahoogroups.com>
> | > > > Sent: May 01, 2003 8:39 AM
> | > > > Subject: [noparse][[/noparse]basicstamps] Re: rf transmission
> | > > >
> | > > >
> | > > > > Progress(but still not working):
> | > > > > I'm using an ac-dc adaptor for both basic stamps
(transmitter
> | > > > > connected to a bs2sx, receiver connected to a bs1), so
power is
> | > > not
> | > > > > an issue.
> | > > > > I increased the antenna size and now I'm getting a stream
of 0s
> | > > > > received at the receiver whenever the transmitter/bs2sx
is on. I
> | > > get
> | > > > > nothing at the receiver when the transmitter/bs2sx is
turned off.
> | > > So
> | > > > > it seems that 0s are indeed being sent from the
transmitter to the
> | > > > > receiver, but I can't send any other numbers.
> | > > > > I've tried using the linear and serial outputs of the
receiver,
> | > > and
> | > > > > I've checked the antenna connections. I've tried different
> | > > resistor
> | > > > > values between the receiver output and the basic stamp
(including
> | > > no
> | > > > > resistor), and none of it makes a difference.
> | > > > >
> | > > > > --- In basicstamps@yahoogroups.com, "Jim Forkin"
<jjf@p...> wrote:
> | > > > > > Sam,
> | > > > > > sounds like you have a near dead battery! You need to
check
> | > > that
> | > > > > rf is
> | > > > > > being transmitted first of all. You need a device to
detect
> | > > rf.
> | > > > > You could
> | > > > > > use a scanner or even a simple diode attached to an
antenna wire
> | > > > > feeding a
> | > > > > > sensitive meter or even an oscilloscope. To build a
simple rf
> | > > > > probe, attach
> | > > > > > one end of a wire aprox 5.5 inches long to the anode of
a 1N4148
> | > > > > diode.
> | > > > > > Attach the other lead of the diode (cathode) to the +
terminal
> | > > of a
> | > > > > uA
> | > > > > > meter. Across the meter, attach a 470 pF capacitor.
Connect
> | > > the -
> | > > > > lead of
> | > > > > > the meter to another 5.5 inch wire. Arrange the wires
like a
> | > > > > dipole and
> | > > > > > while holding the meter case, trigger the rf from the
> | > > transmitter
> | > > > > and you
> | > > > > > should see an indication on the meter that should
increase as
> | > > you
> | > > > > get nearer
> | > > > > > the transmitter and decrease as you move away. It's
crude and
> | > > only
> | > > > > gives
> | > > > > > relative indications, but it works when nothing else is
> | > > available.
> | > > > > If you
> | > > > > > see rf being produced, then you can concentrate on
finding data
> | > > > > troubles.
> | > > > > >
> | > > > > > Jim
> | > > > > > http://www.geocities.com/jimforkin2003/
> | > > > > >
> | > > > > >
Original Message
> | > > > > > From: Sam [noparse][[/noparse]mailto:hard-on@t...]
> | > > > > > Sent: Wednesday, April 30, 2003 2:05 PM
> | > > > > > To: basicstamps@yahoogroups.com
> | > > > > > Subject: [noparse][[/noparse]basicstamps] rf transmission
> | > > > > >
> | > > > > >
> | > > > > > Hi, I have an rws/tws-434 pair. I have the transmitter
on the
> | > > bas2sx
> | > > > > > and the receiver on a bs1. I used to be able to
transmit data,
> | > > then
> | > > > > I
> | > > > > > left the system alone for a week and now it doesn't
transfer
> | > > > > > information via rf anymore. The only time I receive
information
> | > > at
> | > > > > > the receiver end is right when I power up the bs2sx
(transmitter
> | > > > > > attached) or when I tap either the transmitter or
receiver
> | > > antenna
> | > > > > > with my fingers. But all that gets transfered when I do
any of
> | > > the
> | > > > > > above things is 255 255 255 or 0 0 0 (depending on if I
have it
> | > > set
> | > > > > > to true or inverted transmission).
> | > > > > > So it sounds like the transmitter isn't working, right?
Is
> | > > there a
> | > > > > > way I could hook up leds or somehow see if the
transmitter is
> | > > > > > transmitting data? Does anyone have any other
suggestions?
> | > > Thanks.
> | > > > > >
> | > > > > >
> | > > > > >
> | > > > > >
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