I'm trying to control a parameter with a potentiometer (b1k). I've mapped analogRead values from 0-1023 to values 65-220 with steps of 5 using simple division. However analogRead value of the potentiometer varies by 1 (ie. when set to 900, it sometimes reads 900, sometimes 901). Thus, the mapped value also varies by 5 for certain potentiometer values due to residual from the division.
Is this normal for a potentiometer? Should I buy a better one? Or, is there way to prevent this?