> Hi,
>  I'm working on improving(actually reimplementing) an existing
>  analog Circuit using an MCU. Its  for a grain color sorter(used for
> sorting rice)

Curious minds (there are a few of them here :-) ) want to know Why?
Is this for bulk rice sorting (I imagine not as the speed of response
required would be immense) or (more likely?) for analytical work on a small
sample?

Companion questions:
How often do you have to "measure" a new rice grain and typically how long
is the reading stable for?
Have you got control of the arrival rate or does the arrival rate of the
grains vary widely?


        Russell McMahon

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