spi discrete io
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Does anyone make a discrete io chip/board with an spi interface. that is
already optically isolated?
Original Message
From: <iceninevt@y...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, July 31, 2001 1:06 PM
Subject: [noparse][[/noparse]basicstamps] Re: temperature sensors
> Check out the LM34. Works nicely with a 8 bit ADC. You will have the
> resolution, and accuracy, you need.
>
> Isn't the DS1620 acurate to 1/2 deg C? (don't have the data handy,
> sorry)
>
> Rich
>
> --- In basicstamps@y..., "Dave Mucha" <davemucha@j...> wrote:
> > Hi all,
> >
> > I am trying to find a temperature sensor
> > that will measure something between 0 F
> > and 100 F (greater range is fine)
> > and can offer an accuracy of better than
> > one degree F.
> >
> > Seems the IC's that offer serial outputs
> > have poor accuracy's and I know that the
> > thermocouples have way too low of a raw
> > signal to offer the resolution.
> >
> > I looked at the temperature coefficient of
> > a diode (PN junction) and that seems to offer
> > a useable signal, but it requires a lot of
> > support chips.
> >
> > Anybody have any ideas or suggestions ?
> >
> >
> > Dave
>
>
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>
already optically isolated?
Original Message
From: <iceninevt@y...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, July 31, 2001 1:06 PM
Subject: [noparse][[/noparse]basicstamps] Re: temperature sensors
> Check out the LM34. Works nicely with a 8 bit ADC. You will have the
> resolution, and accuracy, you need.
>
> Isn't the DS1620 acurate to 1/2 deg C? (don't have the data handy,
> sorry)
>
> Rich
>
> --- In basicstamps@y..., "Dave Mucha" <davemucha@j...> wrote:
> > Hi all,
> >
> > I am trying to find a temperature sensor
> > that will measure something between 0 F
> > and 100 F (greater range is fine)
> > and can offer an accuracy of better than
> > one degree F.
> >
> > Seems the IC's that offer serial outputs
> > have poor accuracy's and I know that the
> > thermocouples have way too low of a raw
> > signal to offer the resolution.
> >
> > I looked at the temperature coefficient of
> > a diode (PN junction) and that seems to offer
> > a useable signal, but it requires a lot of
> > support chips.
> >
> > Anybody have any ideas or suggestions ?
> >
> >
> > Dave
>
>
> 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/
>
>