Jean-Michel Howland wrote:
>
> Hi all.
>
> I need to to measure weight or to be more precise, measure if weight is
> present or not in the rangeo of 0 to 100kgs.  I really need some sort of
> flexible mat/pad that can be slipped under a cushion.


With the intent of keeping it cheap and sensible I
suggest buying a digital bathroom scales, quite common
now, and they have all the hardware needed to measure
weight in that range. You could interface to the PIC
with little hassle.

"slipping under a cushion" sounds difficult as it is
hard to measure weight unless the person is stationary
and above the sensor. If they are on a lounge or chair
(you said cushion) they may have weight on their feet
or arms.

I'm sure if you explained more about the exact thing
you want to achieve there would be some helpful answers.
-Roman

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