Arduino Motor Shield Rev3

The Arduino Motor Shield is based on the L298, which is a dual full-bridge driver designed to drive inductive loads such as relays, solenoids, DC and stepping motors. It lets you drive two DC motors with your Arduino board, controlling the speed and direction of each one independently. You can also measure the current absorption of each motor, among other features.

see: https://www.arduino.cc/en/Main/ArduinoMotorShieldR3