Since the A4988 is an external library, you must manually add its files to the Proteus installation directory. pouryafaraz/A4988-proteus-library - GitHub
The A4988 simplifies motor control by using a built-in "translator" that requires only two pins from your microcontroller: and DIR . a4988 proteus library
: Handles motor power from 8V to 35V and logic levels of 3.3V or 5V . Since the A4988 is an external library, you
A4988 Proteus Library: A Complete Guide to Simulation and Setup a4988 proteus library