> > > Input : 40mv - 111mv Output : 1V
> > > Input : 112mv - 214mv Output : 1.5V
> > > (unspecified)
> > > Input : 280mv - 400mv Output : 5.0V
>
> > use an A/D with sufficient bits to get desired number output steps
> > tied to D/A with same number of bits
>
> Hi Robert, the steps Yigit has indicated above don't suggest a linear
> relationship. If it isn't log either, then something with smarts is going
> to have to translate
>
> Yigit, can you detail the input ranges and voltage out for each please
>
> You haven't said what 'quality' of output voltage (eg PWM ripple,
> precision) you want and how quickly

Well deadline is monday.

Exact values are like these ;

Input   : 30-57-130-202-270-330-380-422-460-492-520 (mV)

Output :  0 - 0.5 - 1 - 1.5 - 2 - 2.5 - 3 - 3.5 - 4 - 4.5 - 5 (V)

11 values for both.First I will put an offset with a SGA to get 0 for
that 30mv input.And then I am planning to use a non-inverting
(probably) LM358 gain amplifier.Since the graph is

http://img441.imageshack.us/my.php?image=graphprcjt01es8.jpg

seems like it can be operate -almost- linear.

But of course I do have time to adapt it to PIC and it would be really
good since I can get precise output with it.
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