Capacitors and Potentiometers

[Moto154]

In building a driver circuit, how is the capacitor needed calculated? Also, how low in resistance can a potentiometer go? If I have a 100ohm potentiometer, what is the lowest resistance it can give? Thanks

 

[diachi]

If I have a 100ohm potentiometer, what is the lowest resistance it can give? Thanks

~0 Ohms.

 

[Cyparagon]

In building a driver circuit, how is the capacitor needed calculated?

That REALLY depends on the driver. Context clues suggest you're working with a lm317, in which case any capacitance 0.1-10µF will be fine.