Change output voltage range from potentiometer
This is an easy problem so you should work it out yourself for the educational value.



simulate this circuit &ndash; Schematic created using CircuitLab
Figure 1. The circuit.

You know what the voltages are at the top and bottom of the potentiometer, R2, because you have specified them.
Since you have specified R2 you can therefore calculate the current through the pot.
Knowing the current you can calculate the value of R3 that will give the minimum voltage.
Similarly, knowing the current, you can calculate the value of R1 that will drop enough voltage to give you the required maximum output voltage.


Note: small 'k' for kilo. Capitals matter.