I have a uC device, that, using a potentiometer, let me dial a time interval (in milliseconds) The problem is that it doesn't display (on the LCD) the actual time interval, it only shows a value between 0 and 127 (128 values). So in order to understand the actual time interval of each value of the potentiometer, I measured some of the values and I came up with this table
p(0)=0ms p(10)=11ms p(20)=28ms p(30)=50ms p(40)=88ms p(50)=150ms p(60)=250ms p(70)=430ms p(80)=760ms p(90)=1340ms p(100 )=2210ms p(110 )=3750ms p(120 )=6520ms p(127)=9700ms
(where p(20) is when I set the potentiometer to "20", and so on..)
With this, I noticed that it doesn't go linear, it looks like exponential. How can I approximate the other values, for example p(65), without having to measure them all?