- Mon Mar 05, 2018 11:18 am
No, a voltage divider is not a regulator! It can be used to scale down a voltage. But when you apply a significant load to the middle between the resistors then it effectively adds a parallel resistor on the bottom. Then it's changes the scale down factor. No regulation at all.
You must uses proper linear or switchmode voltage regulators. The former 'burns' excess voltage away. The latter 'transforms' the excess voltage into extra current at the lower voltage and is more efficient for battery use.
In your case the Arduino UNO and motor-driver could be powered from the same 9-ish volt 6 AA battery pack. The motor driver usually does not need a fixed voltage, although it too will have it's limits. The Arduino has it's own linear voltage regulator and can easily handle the 9 volt, or even 12 volt. The others like the servo and the lipo/FPV camera will need their own voltage regulator down to their level. (you have not provided specifications so this is all guess work and expectations) All fed by the single large battery pack or each feeding the lower voltage in a cascade is possible.