Here are the parts you will need:

3953 DC motor driver(Available here)
one Board (Gerber file)
one 16 pin socket
one 30kohm resistor
one .5 ohm resistor
one 470uf capacitor
one 47uf capacitor
1 row of 10 headers

The 3953 is a dc motor driver capable of 1.3 amps and 50 volts max. It is controlled through two wires from your microprocessor.

Using a PWM signal to the phase pin the 3953 can drive a dc motor in either direction and vary the speed.

Using a digital LOW enables the break. The motor is locked in it's current position while this pin is held LOW, when the pin goes HIGH the break is released and the motor continues to turn. If the break is never to be used, this pin can be tied to +5.

+5 - Logic supply +5
GND - Ground
BRK - Break, input takes a digital low (break on) or a high (brake off)
PH - Phase, input takes a PWM signal
REF - voltage reference, can be tied high
MDE - Mode pin, can be tied high
MA - motor output A
MB - motor output B
LS - Load supply , motor voltage