L293D Motor Drive Shield Expansion Board
Compatible with Arduino Mega and Uno
2 external terminal power interface, for seperate logic/motor supplies.
2 interface for 5V Servo connected to the Arduino's high-resolution dedicated timer - no jitter.
Can drive 4 DC motors or 2 stepper motors or 2 Servo.
Up to 4 bi-directional DC motors with individual 8-bit speed selection.