Hi Russ,

I'm using the AD7714 and I can not find the AD7730, could you tell me
where You buy it?

Regards,

Octavio
======================================================
Octavio Nogueira  - e-mail:   nogueira@mandic.com.br
http://www.geocities.com/~oct_nogueira
"ProPic" Production PIC Programmer Windows under US$20
======================================================
 ----
De: Russ Steinbach <Russell.E.Steinbach@LERC.NASA.GOV>
Para: PICLIST@MITVMA.MIT.EDU
Data: Segunda-feira, Agosto 25, 1997 09:32
Assunto: Re: PIC Scale -

>At 08:07 AM 8/25/97 -0300, you wrote:
>>>Hi to all.
>>>
>>>I was wondering if anyone out there has attempted to make an
>>>electronic scale using PIC's. I have a few ideas for the PIC side
>>>of things but 'What to use for a SENSOR??' I was thinking of
>>>strain guages but over here in sunny South Africa, these are either
>>>hard to come by or very costly. I'm considering a LVDT (Linear
>>>Variable Differential Transformer) option but I wan't to keep
>>>mechanics to a minimum. I was wondering if any of you out there have
>>>some idea's that you would like to share on the topic.
>
>You may want to look at the new AD7730 chips.  They are specifically
>designed for use with strain gage load cells.  They interface to a PIC
via
>an SPI bus.
>
>These chip are really a specialized DSP with a programmable gain
>instrumentation amplifier front end.  They have lots of capability for
>filtering, tare, and self calibration and test.  They are also about $12
in
>small quantities.
>
>As you can tell, I like the chip.  But, beware, there is a steep learning
>curve to use them.  Its the price you pay for all the functionality.
>
>
>Russ
>