RE: TI-H: pressure sensor
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RE: TI-H: pressure sensor
Yikes! I did not know that!
my sincerest apologizes for the faux pas... no offense intended...
Can you point me to information on that temperature sensor? It's clear I
know less about this than I thought.
TIA
matt zimmerman
biochemist marginally extraordinare
> ----------
> From: Zimmerman, Matthew D (ZIMMERMAN)
> Reply To: ti-hardware@lists.ticalc.org
> Sent: Saturday, January 31, 1998 11:00 PM
> To: 'ti-hardware@lists.ticalc.org'
> Subject: RE: TI-H: pressure sensor
>
>
> I just signed up to this list, but I'd just like to warn you all
> that I think the TI's input protocol is a lot more complicated than
> that. Yes, you convert the voltage into a digital signal, but you also
> have to frame that data with a whole bunch of control characters to
> tell
> the TI that you have real data, and not just random noise. A project
> similar to this-- ie, designing a voltage meter on a TI-- is my senior
> year research. I'll be glad to help you out in any way, but it is
> quite
> a bit harder than you might think.... Sorry for the news...
>
> matt zimmerman
> biochemist extraordinare
>
> > ----------
> > From: ryan pogge[SMTP:ryanpogge@hotmail.com]
> > Reply To: ti-hardware@lists.ticalc.org
> > Sent: Saturday, January 31, 1998 9:12 PM
> > To: ti-hardware@lists.ticalc.org
> > Subject: Re: TI-H: pressure sensor
> >
> >
> > sounds cool to me anyone want to help me out, i can build it but i
> > cant
> > write a driver.
> > and i would realy like to build it :)
> >
> >
> > >Use an I2C A/D converter!
> > >
> > >
> > >> ____
> > >> / \ pin 1 is VCC 5 volts
> > >> | o | pin 2 is ground
> > >> \____/ pin 3 is Vout (betwean 0-5 volts)
> > >> /||||\ pins 4-6 are not used
> > >> | |||| |
> > >> 1 2345 6 _____
> > > | ||_____| I2C |____________SCL
> > > |_|______| A/D |____/\/\
> > > | |______| |________|___SD I'm not sure about the
> > > | | |_____| Interface side of the I2C chip
> > > + -
> > >
> > >I'm not exactly sure if this is right, but I'm sure it will work in
>
> > it's
> > >most basic form. There may be things like a reference voltage or
> > >something like that. If anyone knows anything about an I2C A/D
> > >converter, fix this schematic.
> > >
> > >Richard Piotter
> > >richfiles1@hotmail.com
> > >
> > >>
> > >>I was wondering if we could make a pressure sensor for the 85(or
> any
> >
> > >>other calc for that matter.
> > >>
> > >>I have a motorola mpx4100a presure sensor.
> > >>it looks like this.
> > >>
> > >> ____
> > >> / \ pin 1 is VCC 5 volts
> > >> | o | pin 2 is ground
> > >> \____/ pin 3 is Vout (betwean 0-5 volts)
> > >> /||||\ pins 4-6 are not used
> > >> | |||| |
> > >> 1 2345 6
> > >>
> > >>is it possible to have a assembly program sense the voltage
> comeing
> >
> > >>into the link port? i dont know assembly so i would need some one
> to
> >
> > >>write the driver..but the pressure is related to Vout by an
> equation
> >
> > >>which you can find at along with the data sheet here:
> >
> >>http://mot2.indirect.com/cgi-bin/get?/books/dl200/pdf/mpx4100rev*.pd
> > f
> > >>
> > >>if anyone thinks this is a possible project or would like to help.
> > >>please let me know.
> > >>the hardware is easy i just need someone to help with drivers.
> > >>
> > >>
> > >>
> > >>______________________________________________________
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> > >>
> > >
> > >
> > >______________________________________________________
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> >
> >
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