I want to connect 6 knobs (kohm) in arduino. I searched in various tutorials and i found two ways to do that. The one way is simply connecting a knob to analog-in, Vcc, ground. The other way is to put a constant resistor in the connection between knob and ground, and this resistor must be the same value as the maximum value of the variable resistor(knob). What is the difference between these 2 ways? Is there any difference if i connect all the 6 knobs or just one?