dual motor driver

Hello everyone !!! are new and very passionate about robotics power even though I just started with my experiments. As far as I can see, however, the problem of a board to control multiple motors is a big stumbling block for all.
In your opinion if I connect to a simple driver motor control a reel I operate a power contactor (can be up to hundreds of "A") may work?

Hi, welcome to the forum.

Can you make a drawing of it and tell what kind of power contactor it is ?
Should it be fast, or could it be slow ?

A motor driver board can be controlled by an Arduino, either DC motors or stepper motors. For your reel it needs a geared motor perhaps. Or maybe an actuator.
Sparkfun and Pololu have al kinds of motor driver boards, like these : http://www.pololu.com/product/1451

This guy might give you some ideas (I'm not sure if it is a good idea to link to that, have a look at your own risk) : http://www.youtube.com/watch?v=Ka-LEcZaYqQ