The is a critical software component for controlling the Adafruit Motor Shield V1 (and its popular L293D clones) with an Arduino . This library simplifies the complex task of managing multiple DC motors, stepper motors, and servos by providing high-level commands for speed and direction. How to Download and Install AFMotor.h
The easiest way to get the library is through the built-in in the Arduino IDE. afmotor.h library download arduino