Newbie With a Progect
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Posts: 46,084
hi all, i would like to know if anyone has done anything like this
before, i have a Widband Oxygen sensor controler that will output
from 0-5volts, i want to take this and display it on an lcd.
http://www.diy-wb.com/v_out.htm
Above is a table of voltage VS AFR wich is what i would like to
display, how ever i do not know how i would go about this, i am
guessing i would need a ADC to interface with the 0-5v signal and the
basic stamp, but code is where i am falling down here....
Can any one give me any ideas on this or some where to look ????
Thanks..
before, i have a Widband Oxygen sensor controler that will output
from 0-5volts, i want to take this and display it on an lcd.
http://www.diy-wb.com/v_out.htm
Above is a table of voltage VS AFR wich is what i would like to
display, how ever i do not know how i would go about this, i am
guessing i would need a ADC to interface with the 0-5v signal and the
basic stamp, but code is where i am falling down here....
Can any one give me any ideas on this or some where to look ????
Thanks..
Comments
places]. If the voltage vs AFR relationship is linear you can use Stamp
math to convert to AFR, otherwise you can create a look-up table in DATA
statements.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: mazda_gtx_man [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=X-YQeKSQmZYK9xRoTbyulVf_R1PPpYxjlaznB0t0_v1I8KF1LsMjN_jB7C4n-bLTsQcYNUHKGzSfJwyB2mAkvuE]mazda_gtx_man@y...[/url
Sent: Wednesday, October 08, 2003 2:51 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Newbie With a Progect
hi all, i would like to know if anyone has done anything like this
before, i have a Widband Oxygen sensor controler that will output
from 0-5volts, i want to take this and display it on an lcd.
http://www.diy-wb.com/v_out.htm
Above is a table of voltage VS AFR wich is what i would like to
display, how ever i do not know how i would go about this, i am
guessing i would need a ADC to interface with the 0-5v signal and the
basic stamp, but code is where i am falling down here....
Can any one give me any ideas on this or some where to look ????
Thanks..
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do not know how to do a lookup table i have only ever done very basic
stuff with the stamp...
Also what kinda refesh rate could i get, i need a max of 1 second.
do you thibnk that would be possible..???
Thanks
Jason
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> We have ADC0831 (simple 8-bit ADC) code on our web site [noparse][[/noparse]in several
> places]. If the voltage vs AFR relationship is linear you can use
Stamp
> math to convert to AFR, otherwise you can create a look-up table in
DATA
> statements.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> Sent: Wednesday, October 08, 2003 2:51 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Newbie With a Progect
>
>
> hi all, i would like to know if anyone has done anything like this
> before, i have a Widband Oxygen sensor controler that will output
> from 0-5volts, i want to take this and display it on an lcd.
>
> http://www.diy-wb.com/v_out.htm
>
> Above is a table of voltage VS AFR wich is what i would like to
> display, how ever i do not know how i would go about this, i am
> guessing i would need a ADC to interface with the 0-5v signal and
the
> basic stamp, but code is where i am falling down here....
>
> Can any one give me any ideas on this or some where to look ????
>
> 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/
>
>
>
>
> This message has been scanned by WebShield. Please report SPAM to
> abuse@p...
the tar out of a long-winded explanation. This little program uses
values from your chart and shows how to do a lookup table in DATA
statements using Word values. Note that the Get_AFR expects a value of
at least 140
'{$STAMP BS2}
'{$PBASIC 2.5}
vOut VAR Byte ' 100 = 1.00 volts
afr VAR Word ' fuel ratio (?)a
eePntr VAR Word ' pointer into EE table
AFRTable DATA Word 1008, Word 1023, Word 1038, Word 1053
DATA Word 1069, Word 1086, Word 1103, Word 1120
Demo:
FOR vOut = 140 TO 175 STEP 5
GOSUB Get_AFR
DEBUG DEC vOut / 100, ".", DEC2 vOut, TAB
DEBUG DEC2 afr / 100, ".", DEC2 afr, CR
next
END
Get_AFR: ' convert vOut to AFR
eePntr = vOut / 5 - 28 * 2 ' create table pointer
READ (AFRTable + eePntr), Word afr ' read AFR from table
RETURN
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: mazda_gtx_man [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=ic1TYxE7zbQ3KazgyORfNYgIAuSNzPatSHuBaxFEiznhv0owgspi__B_t44hcNpDVUN0PkrX4tr5o5RWTA]mazda_gtx_man@y...[/url
Sent: Thursday, October 09, 2003 8:30 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
no it is not a liner out put, that is why i am having the problems, i
do not know how to do a lookup table i have only ever done very basic
stuff with the stamp...
Also what kinda refesh rate could i get, i need a max of 1 second. do
you thibnk that would be possible..???
Thanks
Jason
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> We have ADC0831 (simple 8-bit ADC) code on our web site [noparse][[/noparse]in several
> places]. If the voltage vs AFR relationship is linear you can use
Stamp
> math to convert to AFR, otherwise you can create a look-up table in
DATA
> statements.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> Sent: Wednesday, October 08, 2003 2:51 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Newbie With a Progect
>
>
> hi all, i would like to know if anyone has done anything like this
> before, i have a Widband Oxygen sensor controler that will output
> from 0-5volts, i want to take this and display it on an lcd.
>
> http://www.diy-wb.com/v_out.htm
>
> Above is a table of voltage VS AFR wich is what i would like to
> display, how ever i do not know how i would go about this, i am
> guessing i would need a ADC to interface with the 0-5v signal and
the
> basic stamp, but code is where i am falling down here....
>
> Can any one give me any ideas on this or some where to look ????
>
> 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/
>
>
>
>
> This message has been scanned by WebShield. Please report SPAM to
> abuse@p...
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abuse@p....
that is a lot simpler than i thought it would be....!!!!
but the values in the AFRTable are what?? they do not seem to relate
to anything i can see off hand, just want to know before i get into
somthing i can not do here, but it dos not look like it is going to
be to dificult.
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> Here you go. If a picture is worth a 1000 words, a demo program
beats
> the tar out of a long-winded explanation. This little program uses
> values from your chart and shows how to do a lookup table in DATA
> statements using Word values. Note that the Get_AFR expects a
value of
> at least 140
>
>
> '{$STAMP BS2}
> '{$PBASIC 2.5}
>
> vOut VAR Byte ' 100 = 1.00 volts
> afr VAR Word ' fuel ratio (?)a
> eePntr VAR Word ' pointer into EE
table
>
>
> AFRTable DATA Word 1008, Word 1023, Word 1038, Word 1053
> DATA Word 1069, Word 1086, Word 1103, Word 1120
>
>
> Demo:
> FOR vOut = 140 TO 175 STEP 5
> GOSUB Get_AFR
> DEBUG DEC vOut / 100, ".", DEC2 vOut, TAB
> DEBUG DEC2 afr / 100, ".", DEC2 afr, CR
> next
> END
>
>
> Get_AFR: ' convert vOut to
AFR
> eePntr = vOut / 5 - 28 * 2 ' create table
pointer
> READ (AFRTable + eePntr), Word afr ' read AFR from
table
> RETURN
>
>
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
>
>
Original Message
> From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> Sent: Thursday, October 09, 2003 8:30 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
>
>
> no it is not a liner out put, that is why i am having the problems,
i
> do not know how to do a lookup table i have only ever done very
basic
> stuff with the stamp...
>
> Also what kinda refesh rate could i get, i need a max of 1 second.
do
> you thibnk that would be possible..???
>
> Thanks
> Jason
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > We have ADC0831 (simple 8-bit ADC) code on our web site [noparse][[/noparse]in
several
> > places]. If the voltage vs AFR relationship is linear you can use
> Stamp
> > math to convert to AFR, otherwise you can create a look-up table
in
> DATA
> > statements.
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
Original Message
> > From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> > Sent: Wednesday, October 08, 2003 2:51 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Newbie With a Progect
> >
> >
> > hi all, i would like to know if anyone has done anything like this
> > before, i have a Widband Oxygen sensor controler that will output
> > from 0-5volts, i want to take this and display it on an lcd.
> >
> > http://www.diy-wb.com/v_out.htm
> >
> > Above is a table of voltage VS AFR wich is what i would like to
> > display, how ever i do not know how i would go about this, i am
> > guessing i would need a ADC to interface with the 0-5v signal and
> the
> > basic stamp, but code is where i am falling down here....
> >
> > Can any one give me any ideas on this or some where to look ????
> >
> > 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/
> >
> >
> >
> >
> > This message has been scanned by WebShield. Please report SPAM to
> > abuse@p...
>
>
> To UNSUBSCRIBE, just send mail to:
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> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
> This message has been scanned by WebShield. Please report SPAM to
> abuse@p...
this thread. In that table the left-most column is voltage, the third
column is AFR -- which I thought you wanted to extract. Didn't you? I
only used the first eight values, you can fill in the rest. There is a
slight trick in calculating the address, but only slight. I noticed
that the voltages in that table were in increments of 0.05 -- so I
divided the voltage by five, then offset for the table starting at 1.40
(hence the -28). Since the AFR table holds Word (two byte) values, the
pointer is multiplied by two to for correct alignment.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: mazda_gtx_man [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=wZpGT-V6or4mJOzZ06T4UngO-eQeUlMkRZ6pNxqaO2BnEW3pXATw4dClTZCe0tt4tiO0mNdTY0psf943TYuNHQM]mazda_gtx_man@y...[/url
Sent: Thursday, October 09, 2003 10:23 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
Wow you answer fast, thanks [noparse]:)[/noparse]
that is a lot simpler than i thought it would be....!!!!
but the values in the AFRTable are what?? they do not seem to relate
to anything i can see off hand, just want to know before i get into
somthing i can not do here, but it dos not look like it is going to
be to dificult.
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> Here you go. If a picture is worth a 1000 words, a demo program
beats
> the tar out of a long-winded explanation. This little program uses
> values from your chart and shows how to do a lookup table in DATA
> statements using Word values. Note that the Get_AFR expects a
value of
> at least 140
>
>
> '{$STAMP BS2}
> '{$PBASIC 2.5}
>
> vOut VAR Byte ' 100 = 1.00 volts
> afr VAR Word ' fuel ratio (?)a
> eePntr VAR Word ' pointer into EE
table
>
>
> AFRTable DATA Word 1008, Word 1023, Word 1038, Word 1053
> DATA Word 1069, Word 1086, Word 1103, Word 1120
>
>
> Demo:
> FOR vOut = 140 TO 175 STEP 5
> GOSUB Get_AFR
> DEBUG DEC vOut / 100, ".", DEC2 vOut, TAB
> DEBUG DEC2 afr / 100, ".", DEC2 afr, CR
> next
> END
>
>
> Get_AFR: ' convert vOut to
AFR
> eePntr = vOut / 5 - 28 * 2 ' create table
pointer
> READ (AFRTable + eePntr), Word afr ' read AFR from
table
> RETURN
>
>
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
>
>
Original Message
> From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> Sent: Thursday, October 09, 2003 8:30 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
>
>
> no it is not a liner out put, that is why i am having the problems,
i
> do not know how to do a lookup table i have only ever done very
basic
> stuff with the stamp...
>
> Also what kinda refesh rate could i get, i need a max of 1 second.
do
> you thibnk that would be possible..???
>
> Thanks
> Jason
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > We have ADC0831 (simple 8-bit ADC) code on our web site [noparse][[/noparse]in
several
> > places]. If the voltage vs AFR relationship is linear you can use
> Stamp
> > math to convert to AFR, otherwise you can create a look-up table
in
> DATA
> > statements.
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
Original Message
> > From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> > Sent: Wednesday, October 08, 2003 2:51 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Newbie With a Progect
> >
> >
> > hi all, i would like to know if anyone has done anything like this
> > before, i have a Widband Oxygen sensor controler that will output
> > from 0-5volts, i want to take this and display it on an lcd.
> >
> > http://www.diy-wb.com/v_out.htm
> >
> > Above is a table of voltage VS AFR wich is what i would like to
> > display, how ever i do not know how i would go about this, i am
> > guessing i would need a ADC to interface with the 0-5v signal and
> the
> > basic stamp, but code is where i am falling down here....
> >
> > Can any one give me any ideas on this or some where to look ????
> >
> > 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/
> >
> >
> >
> >
> > This message has been scanned by WebShield. Please report SPAM to
> > abuse@p...
>
>
> 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
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>
>
>
>
> This message has been scanned by WebShield. Please report SPAM to
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abuse@p....
on the controller in about a week, so i will com back and let you
know then...
and yes you use the right to colums....
i have a LTC1286 would this be ok for the ADC ?? as i already have it.
and i also have a few graphical LCDs handing around, are these hard
to control with the stamp ????
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> The values in AFRTable come from the link you posted at the
beginning of
> this thread. In that table the left-most column is voltage, the
third
> column is AFR -- which I thought you wanted to extract. Didn't
you? I
> only used the first eight values, you can fill in the rest. There
is a
> slight trick in calculating the address, but only slight. I noticed
> that the voltages in that table were in increments of 0.05 -- so I
> divided the voltage by five, then offset for the table starting at
1.40
> (hence the -28). Since the AFR table holds Word (two byte) values,
the
> pointer is multiplied by two to for correct alignment.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> Sent: Thursday, October 09, 2003 10:23 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
>
>
> Wow you answer fast, thanks [noparse]:)[/noparse]
> that is a lot simpler than i thought it would be....!!!!
> but the values in the AFRTable are what?? they do not seem to
relate
> to anything i can see off hand, just want to know before i get into
> somthing i can not do here, but it dos not look like it is going to
> be to dificult.
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > Here you go. If a picture is worth a 1000 words, a demo program
> beats
> > the tar out of a long-winded explanation. This little program
uses
> > values from your chart and shows how to do a lookup table in DATA
> > statements using Word values. Note that the Get_AFR expects a
> value of
> > at least 140
> >
> >
> > '{$STAMP BS2}
> > '{$PBASIC 2.5}
> >
> > vOut VAR Byte ' 100 = 1.00 volts
> > afr VAR Word ' fuel ratio (?)a
> > eePntr VAR Word ' pointer into EE
> table
> >
> >
> > AFRTable DATA Word 1008, Word 1023, Word 1038, Word 1053
> > DATA Word 1069, Word 1086, Word 1103, Word 1120
> >
> >
> > Demo:
> > FOR vOut = 140 TO 175 STEP 5
> > GOSUB Get_AFR
> > DEBUG DEC vOut / 100, ".", DEC2 vOut, TAB
> > DEBUG DEC2 afr / 100, ".", DEC2 afr, CR
> > next
> > END
> >
> >
> > Get_AFR: ' convert vOut to
> AFR
> > eePntr = vOut / 5 - 28 * 2 ' create table
> pointer
> > READ (AFRTable + eePntr), Word afr ' read AFR from
> table
> > RETURN
> >
> >
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
> >
> >
Original Message
> > From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> > Sent: Thursday, October 09, 2003 8:30 AM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
> >
> >
> > no it is not a liner out put, that is why i am having the
problems,
> i
> > do not know how to do a lookup table i have only ever done very
> basic
> > stuff with the stamp...
> >
> > Also what kinda refesh rate could i get, i need a max of 1 second.
> do
> > you thibnk that would be possible..???
> >
> > Thanks
> > Jason
> >
> > --- In basicstamps@yahoogroups.com, "Jon Williams"
<jwilliams@p...>
> > wrote:
> > > We have ADC0831 (simple 8-bit ADC) code on our web site [noparse][[/noparse]in
> several
> > > places]. If the voltage vs AFR relationship is linear you can
use
> > Stamp
> > > math to convert to AFR, otherwise you can create a look-up table
> in
> > DATA
> > > statements.
> > >
> > > -- Jon Williams
> > > -- Applications Engineer, Parallax
> > > -- Dallas Office
> > >
> > >
> > >
Original Message
> > > From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> > > Sent: Wednesday, October 08, 2003 2:51 PM
> > > To: basicstamps@yahoogroups.com
> > > Subject: [noparse][[/noparse]basicstamps] Newbie With a Progect
> > >
> > >
> > > hi all, i would like to know if anyone has done anything like
this
> > > before, i have a Widband Oxygen sensor controler that will
output
> > > from 0-5volts, i want to take this and display it on an lcd.
> > >
> > > http://www.diy-wb.com/v_out.htm
> > >
> > > Above is a table of voltage VS AFR wich is what i would like to
> > > display, how ever i do not know how i would go about this, i am
> > > guessing i would need a ADC to interface with the 0-5v signal
and
> > the
> > > basic stamp, but code is where i am falling down here....
> > >
> > > Can any one give me any ideas on this or some where to look ????
> > >
> > > 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/
> > >
> > >
> > >
> > >
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You just need to put your nose to the grindstone and do your project.
Should be fun.
-- Jon
Original Message
From: mazda_gtx_man [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=BmAm_-dbUvTMZINLLnl7xxUTM1WGzkW6zZbvtdYUZlUfDadJKw8Cjk8IACk_N5g0ZvOEKPE3Dp52dwE5JZ9BC_WI]mazda_gtx_man@y...[/url
Sent: Thursday, October 09, 2003 10:45 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
OK i got you [noparse]:)[/noparse] thanks for your help sofar i will be getting my hands
on the controller in about a week, so i will com back and let you
know then...
and yes you use the right to colums....
i have a LTC1286 would this be ok for the ADC ?? as i already have it.
and i also have a few graphical LCDs handing around, are these hard
to control with the stamp ????
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> The values in AFRTable come from the link you posted at the
beginning of
> this thread. In that table the left-most column is voltage, the
third
> column is AFR -- which I thought you wanted to extract. Didn't
you? I
> only used the first eight values, you can fill in the rest. There
is a
> slight trick in calculating the address, but only slight. I noticed
> that the voltages in that table were in increments of 0.05 -- so I
> divided the voltage by five, then offset for the table starting at
1.40
> (hence the -28). Since the AFR table holds Word (two byte) values,
the
> pointer is multiplied by two to for correct alignment.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> Sent: Thursday, October 09, 2003 10:23 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
>
>
> Wow you answer fast, thanks [noparse]:)[/noparse]
> that is a lot simpler than i thought it would be....!!!!
> but the values in the AFRTable are what?? they do not seem to
relate
> to anything i can see off hand, just want to know before i get into
> somthing i can not do here, but it dos not look like it is going to
> be to dificult.
>
> --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
> wrote:
> > Here you go. If a picture is worth a 1000 words, a demo program
> beats
> > the tar out of a long-winded explanation. This little program
uses
> > values from your chart and shows how to do a lookup table in DATA
> > statements using Word values. Note that the Get_AFR expects a
> value of
> > at least 140
> >
> >
> > '{$STAMP BS2}
> > '{$PBASIC 2.5}
> >
> > vOut VAR Byte ' 100 = 1.00 volts
> > afr VAR Word ' fuel ratio (?)a
> > eePntr VAR Word ' pointer into EE
> table
> >
> >
> > AFRTable DATA Word 1008, Word 1023, Word 1038, Word 1053
> > DATA Word 1069, Word 1086, Word 1103, Word 1120
> >
> >
> > Demo:
> > FOR vOut = 140 TO 175 STEP 5
> > GOSUB Get_AFR
> > DEBUG DEC vOut / 100, ".", DEC2 vOut, TAB
> > DEBUG DEC2 afr / 100, ".", DEC2 afr, CR
> > next
> > END
> >
> >
> > Get_AFR: ' convert vOut to
> AFR
> > eePntr = vOut / 5 - 28 * 2 ' create table
> pointer
> > READ (AFRTable + eePntr), Word afr ' read AFR from
> table
> > RETURN
> >
> >
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
> >
> >
Original Message
> > From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> > Sent: Thursday, October 09, 2003 8:30 AM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Re: Newbie With a Progect
> >
> >
> > no it is not a liner out put, that is why i am having the
problems,
> i
> > do not know how to do a lookup table i have only ever done very
> basic
> > stuff with the stamp...
> >
> > Also what kinda refesh rate could i get, i need a max of 1 second.
> do
> > you thibnk that would be possible..???
> >
> > Thanks
> > Jason
> >
> > --- In basicstamps@yahoogroups.com, "Jon Williams"
<jwilliams@p...>
> > wrote:
> > > We have ADC0831 (simple 8-bit ADC) code on our web site [noparse][[/noparse]in
> several
> > > places]. If the voltage vs AFR relationship is linear you can
use
> > Stamp
> > > math to convert to AFR, otherwise you can create a look-up table
> in
> > DATA
> > > statements.
> > >
> > > -- Jon Williams
> > > -- Applications Engineer, Parallax
> > > -- Dallas Office
> > >
> > >
> > >
Original Message
> > > From: mazda_gtx_man [noparse][[/noparse]mailto:mazda_gtx_man@y...]
> > > Sent: Wednesday, October 08, 2003 2:51 PM
> > > To: basicstamps@yahoogroups.com
> > > Subject: [noparse][[/noparse]basicstamps] Newbie With a Progect
> > >
> > >
> > > hi all, i would like to know if anyone has done anything like
this
> > > before, i have a Widband Oxygen sensor controler that will
output
> > > from 0-5volts, i want to take this and display it on an lcd.
> > >
> > > http://www.diy-wb.com/v_out.htm
> > >
> > > Above is a table of voltage VS AFR wich is what i would like to
> > > display, how ever i do not know how i would go about this, i am
> > > guessing i would need a ADC to interface with the 0-5v signal
and
> > the
> > > basic stamp, but code is where i am falling down here....
> > >
> > > Can any one give me any ideas on this or some where to look ????
> > >
> > > Thanks..
> > >
> > >
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