Adafruit Industries Adafruit Industries Motor/Stepper/Servo Shield for Arduino Kit
Here is a design for a full-featured motor shield that will be able to power many simple to medium-complexity projects. Up to 4 bi-directional DC motors with individual 8-bit speed selection (so, about 0.5% resolution). Up to 2 stepper motors (unipolar or bipolar) with single coil, double coil or interleaved stepping. 2 connections for 5V 'hobby' servos connected to the Arduino's high-resolution dedicated timer - no jitter!
Adafruit Industries Motor/Stepper/Servo Shield for Arduino Kit
Usually ships in 5-7 business days. Limited availability. May not be in stock at time of order. No back orders.