Yigit Turgut wrote:

>>>If number of steps allow, you can use LED bar=graph driver
>>
>>The LM391x or something like it did pop into my head but the full
>>relationship between Yigit's input and output wasn't spelled out
> 
> 
> Well,I am planning to get all the output from one pin.I actually
> haven't heard of anything like this before since all things must be
> handled by the software what is left is a bunch of "if's".As pseudo ;
> 
> if(input<=112mv){ output=1v; } and so on.At the top of all the if's is the
> 
> if{(input<=400mv) {output=5v; }
> 
> is this code embedable somehow ? I mean can't I sense the input "values" ?

Seems to me that the simplest solution to what he seems to be describing
(variable voltage in converted to discrete steps of voltage out)
is to use an A/D with sufficient bits to get desired number output steps
tied to D/A with same number of bits.
Scale up the input value to have it cover the required number of steps,
and scale the D/A to get the output voltage range he requires for that number
of steps.

No PIC needed.

If he really wants to use a PIC, he needs one with on board A/D, and either
CCP/PWM output or software PWM to fake out a D/A (doesn't say how fast he
has to do this conversion so a simple R/C low pass filter may be sufficient).

I know of no PIC with on board D/A to give him "one pin" output.

Robert

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