Would anybody have how to help me to solve a problem, although simple,
but not for a less experienced user?

I am using a sensor of pressure and an operational one that supplies me
the following values:


PSI      Volts

0          1,183
5          1,440
10        1,773
15        2,092
20        2,471
25        2,823
30        3,150
35        3,460
40        3,750

When using a test routine multiplying the value of ADRES (PIC16C74A) for
16 and the routine bin_bcd I get to obtain a reading in display of 40,80
when in full scale (255).

But as there is not linear of the circuit in subject, I don't get to
maintain a proportional value in the display to input of  PIC.

How make a table that maintains the proportion?

Does a formula exist for this problem?

If somebody possesses an answer, I would thank if  could send me.

Thank you

Joco Batista - Jq96@claret.com.br / jq96@netsite.com.br