Alberto,

Check out this site http://www.cirrus.com/products/overviews/cs5516.html
It has some application sheets at the end that might be of help.  They
cover interfacing Strain gages and thermocouples to their analog to digital
converters but much of the info applies to all ADC's.

You might want to check out Analog Devices ( http://www.analog.com/ ) ADCs
and instrumentation amplifiers.  Many of the data sheets have example
circuits.

Steve


----------
> From: Alberto Smulders <insad@ITACOM.COM.PY>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Load cells, thermocouples
> Date: Tuesday, November 11, 1997 6:16 AM
>
> Does anybody have experience with interfacing load cells and
thermocouples
> to microprocessors? And does anybody know where to find practical
> schematics about it on the internet?
>
> Albert Smulders
> InSAD - Encarnacion, Paraguay
> insad@itacom.com.py