thank for the reply guy.
First of all, @jimboZA, when I say "juice" I mean all kind of power. Is it possible? or 4 AA batteries is simply not enough... ? Then, 4 A batteries is the ONLY thing I can use to power everything, from servos to dc motor. Also, the DC motor are toy types @3V.
And with the sum of all current, why that matter ? is it because the batteries can't provide enough ?
Then, about the servos, it wiould probably be use onlyy for direction so the speed isn't a big concern. It's the required torque that I'm mostly concerned.
This is my first project with arduino and all type of micro controller so every obvious information would be usefull ! 