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Reading a pressure transducer signal with a bs2 stamp. — Parallax Forums

Reading a pressure transducer signal with a bs2 stamp.

ArchiverArchiver Posts: 46,084
edited 2000-06-20 19:42 in General Discussion
·i have a pressure transducer that gives an output between 1volt and 4volts that is proportional to a varying pressure applied to the transducer.
·does anyone know how this varying voltage (and pressure) may be read by the bs2?
·the way varying·resistance can be read using the rctime feature, is the type of thing that would be ideal.
· i would appreciate any assistance.

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-06-14 04:14
    --- In basicstamps@egroups.com, "Keith Moore" <keithmoore1@n...>
    wrote:
    > I HAVE A PRESSURE TRANSDUCER THAT GIVES AN OUTPUT BETWEEN 1VOLT
    AND
    4VOLTS THAT IS PROPORTIONAL TO A VARYING PRESSURE APPLIED TO THE
    TRANSDUCER.
    > DOES ANYONE KNOW HOW THIS VARYING VOLTAGE (AND PRESSURE) MAY BE
    READ BY THE BS2?
    > THE WAY VARYING RESISTANCE CAN BE READ USING THE RCTIME FEATURE,
    IS
    THE TYPE OF THING THAT WOULD BE IDEAL.
    > I WOULD APPRECIATE ANY ASSISTANCE.

    I think you are going to need to use an ADC.
    See http://geocities.com/SiliconValley/Orchard/6633/altimeter.html
    for a good discussion of reading a pressure transducer with a BS2
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-14 13:14
    you will need an a/d converter, look in the stamp apps on parallax's web
    site, it gives hookup and programming instructions for an ltc device (12
    bits)

    Norm & Monda
    Cozy MK IV #202
    Ford V-6 Powered
    Original Message
    From: "Keith Moore" <keithmoore1@n...>
    To: <Basicstamps@egroups.com>
    Sent: Tuesday, June 13, 2000 2:36 PM
    Subject: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    STAMP.


    I HAVE A PRESSURE TRANSDUCER THAT GIVES AN OUTPUT BETWEEN 1VOLT AND 4VOLTS
    THAT IS PROPORTIONAL TO A VARYING PRESSURE APPLIED TO THE TRANSDUCER.
    DOES ANYONE KNOW HOW THIS VARYING VOLTAGE (AND PRESSURE) MAY BE READ BY
    THE BS2?
    THE WAY VARYING RESISTANCE CAN BE READ USING THE RCTIME FEATURE, IS THE
    TYPE OF THING THAT WOULD BE IDEAL.
    I WOULD APPRECIATE ANY ASSISTANCE.
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-14 16:14
    I want to measure and record the change in hydraulic pressure in one of the
    servo cylinders of an automatic transmission relative to transmission output
    speed.
    I am intending to store the two values consecutively in the stamps EEPROM
    and then read them after the end of the vehicle test run.
    Original Message
    From: Mohamed REFKY <refky@h...>
    To: <basicstamps@egroups.com>
    Sent: Wednesday, June 14, 2000 1:42 PM
    Subject: Re: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    STAMP.


    > hello,
    > LTC2400 A/D from Linear Technology is for weigh-scale and pressure
    > measurement applications.Look at data sheet page 30,there is a code for
    > BS2.
    > What would you like to measure?.I'm also interested in such applications
    ((
    > specifically weighing systems ))
    >
    > Regards
    > Mohamed RefkY
    >
    >
    > >From: "Keith Moore" <keithmoore1@n...>
    > >Reply-To: basicstamps@egroups.com
    > >To: <Basicstamps@egroups.com>
    > >Subject: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    > >STAMP.
    > >Date: Tue, 13 Jun 2000 14:36:41 -0400
    > >
    > > I HAVE A PRESSURE TRANSDUCER THAT GIVES AN OUTPUT BETWEEN 1VOLT AND
    > >4VOLTS THAT IS PROPORTIONAL TO A VARYING PRESSURE APPLIED TO THE
    > >TRANSDUCER.
    > > DOES ANYONE KNOW HOW THIS VARYING VOLTAGE (AND PRESSURE) MAY BE READ BY
    > >THE BS2?
    > > THE WAY VARYING RESISTANCE CAN BE READ USING THE RCTIME FEATURE, IS THE
    > >TYPE OF THING THAT WOULD BE IDEAL.
    > > I WOULD APPRECIATE ANY ASSISTANCE.
    >
    > ________________________________________________________________________
    > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
    >
    >
    >
    >
    >
    >


    _____________________________________________
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  • ArchiverArchiver Posts: 46,084
    edited 2000-06-14 23:42
    hello,
    LTC2400 A/D from Linear Technology is for weigh-scale and pressure
    measurement applications.Look at data sheet page 30,there is a code for
    BS2.
    What would you like to measure?.I'm also interested in such applications ((
    specifically weighing systems ))

    Regards
    Mohamed RefkY


    >From: "Keith Moore" <keithmoore1@n...>
    >Reply-To: basicstamps@egroups.com
    >To: <Basicstamps@egroups.com>
    >Subject: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    >STAMP.
    >Date: Tue, 13 Jun 2000 14:36:41 -0400
    >
    > I HAVE A PRESSURE TRANSDUCER THAT GIVES AN OUTPUT BETWEEN 1VOLT AND
    >4VOLTS THAT IS PROPORTIONAL TO A VARYING PRESSURE APPLIED TO THE
    >TRANSDUCER.
    > DOES ANYONE KNOW HOW THIS VARYING VOLTAGE (AND PRESSURE) MAY BE READ BY
    >THE BS2?
    > THE WAY VARYING RESISTANCE CAN BE READ USING THE RCTIME FEATURE, IS THE
    >TYPE OF THING THAT WOULD BE IDEAL.
    > I WOULD APPRECIATE ANY ASSISTANCE.

    ________________________________________________________________________
    Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-15 00:06
    I HAVE A PRESSURE TRANSDUCER THAT GIVES AN OUTPUT BETWEEN 1VOLT AND 4VOLTS
    THAT IS PROPORTIONAL TO A VARYING PRESSURE APPLIED TO THE TRANSDUCER.

    What pressure transducer are you using?

    Paul Verhage
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-15 12:56
    Transducer is an Omega PX181-500G5V. Although it handles pressures up to 500
    p.s.i. and outputs up tp 5V, I am working up to a lower pressure.
    Original Message
    From: Paul Verhage <pverhage@s...>
    To: <basicstamps@egroups.com>
    Sent: Wednesday, June 14, 2000 7:06 PM
    Subject: RE: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    STAMP.


    > I HAVE A PRESSURE TRANSDUCER THAT GIVES AN OUTPUT BETWEEN 1VOLT AND 4VOLTS
    > THAT IS PROPORTIONAL TO A VARYING PRESSURE APPLIED TO THE TRANSDUCER.
    >
    > What pressure transducer are you using?
    >
    > Paul Verhage
    >
    >
    >
    >
    >

    _____________________________________________
    NetZero - Defenders of the Free World
    Click here for FREE Internet Access and Email
    http://www.netzero.net/download/index.html
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-16 23:42
    Original Message
    From: Keith Moore <keithmoore1@n...>
    To: <basicstamps@egroups.com>
    Sent: 15 June, 2000 5:56 AM
    Subject: Re: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    STAMP.


    > Transducer is an Omega PX181-500G5V. Although it handles pressures up to
    500
    > p.s.i. and outputs up tp 5V, I am working up to a lower pressure.


    I've not heard of that one before. I'm looking for a pressure transducer
    that will give an output for 1 atmosphere to vacuum. Can you tell me where
    you got this sensor from? I'll like to look into it.

    Paul
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-18 14:16
    Paul, depending on your application and if it is auotmotive in
    nature, you may want to look at a pressure/vacuum transducer that is
    installed on a turbocharged Buick Grand National. It uses a 5 volt
    reference value, but I can't recall the upper pressure limit.

    David

    > I've not heard of that one before. I'm looking for a pressure
    transducer
    > that will give an output for 1 atmosphere to vacuum. Can you tell
    me where
    > you got this sensor from? I'll like to look into it.
    >
    > Paul
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-18 17:41
    I am also looking for a similar sensor. There are a number of them
    at DIGI-KEY . Reference voltage of 5 volts output between0.25 and
    4.5v at 15psi.



    >From: "david " <david@r...>
    >Reply-To: basicstamps@egroups.com
    >To: basicstamps@egroups.com
    >Subject: [noparse][[/noparse]basicstamps] Re: READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    >STAMP.
    >Date: Sun, 18 Jun 2000 13:16:07 -0000
    >
    >Paul, depending on your application and if it is auotmotive in
    >nature, you may want to look at a pressure/vacuum transducer that is
    >installed on a turbocharged Buick Grand National. It uses a 5 volt
    >reference value, but I can't recall the upper pressure limit.
    >
    >David
    >
    > > I've not heard of that one before. I'm looking for a pressure
    >transducer
    > > that will give an output for 1 atmosphere to vacuum. Can you tell
    >me where
    > > you got this sensor from? I'll like to look into it.
    > >
    > > Paul
    >
    >
    >
    >
    >

    ________________________________________________________________________
    Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-19 01:26
    use the mpx series from newark.
    for 1ams to vacuum you need a psia transducer.
    pounds per square inch absolute.

    Norm & Monda
    Cozy MK IV #202
    Ford V-6 Powered
    Original Message
    From: "Paul Verhage" <pverhage@s...>
    To: <basicstamps@egroups.com>
    Sent: Friday, June 16, 2000 6:42 PM
    Subject: Re: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    STAMP.


    >
    Original Message
    > From: Keith Moore <keithmoore1@n...>
    > To: <basicstamps@egroups.com>
    > Sent: 15 June, 2000 5:56 AM
    > Subject: Re: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    > STAMP.
    >
    >
    > > Transducer is an Omega PX181-500G5V. Although it handles pressures up to
    > 500
    > > p.s.i. and outputs up tp 5V, I am working up to a lower pressure.
    >
    >
    > I've not heard of that one before. I'm looking for a pressure transducer
    > that will give an output for 1 atmosphere to vacuum. Can you tell me
    where
    > you got this sensor from? I'll like to look into it.
    >
    > Paul
    >
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-19 12:47
    Paul.
    www.omega.com
    Their PX141-015V5V transducer handles from -15 to 0 PSIV.
    Original Message
    From: Paul Verhage <pverhage@s...>
    To: <basicstamps@egroups.com>
    Sent: Friday, June 16, 2000 6:42 PM
    Subject: Re: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    STAMP.


    >
    Original Message
    > From: Keith Moore <keithmoore1@n...>
    > To: <basicstamps@egroups.com>
    > Sent: 15 June, 2000 5:56 AM
    > Subject: Re: [noparse][[/noparse]basicstamps] READING A PRESSURE TRANSDUCER SIGNAL WITH A BS2
    > STAMP.
    >
    >
    > > Transducer is an Omega PX181-500G5V. Although it handles pressures up to
    > 500
    > > p.s.i. and outputs up tp 5V, I am working up to a lower pressure.
    >
    >
    > I've not heard of that one before. I'm looking for a pressure transducer
    > that will give an output for 1 atmosphere to vacuum. Can you tell me
    where
    > you got this sensor from? I'll like to look into it.
    >
    > Paul
    >
    >
    >
    >
    >

    _____________________________________________
    NetZero - Defenders of the Free World
    Click here for FREE Internet Access and Email
    http://www.netzero.net/download/index.html
  • ArchiverArchiver Posts: 46,084
    edited 2000-06-20 19:42
    At 08:26 PM 6/18/00 -0400, you wrote:

    >use the mpx series from newark.
    >for 1ams to vacuum you need a psia transducer.
    >pounds per square inch absolute.

    Prof. Anderson has these for less and doesn't require a minimum order. Check:

    http://www.phanderson.com/

    and click 'ordering information'.

    Duncan
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