A4988 Stepper driver

he A4988 Stepper Motor Driver Module is a compact and reliable driver designed to control bipolar stepper motors in applications such as 3D printers, CNC machines, robotics, automation systems, and DIY projects. It provides a simple STEP/DIR control interface, making it easy to operate with microcontrollers and development boards such as Arduino and other compatible controllers. The module supports a wide 8–35V DC motor supply range and offers adjustable current control. Depending on cooling conditions, it can handle approximately 1A per phase without additional cooling and up to around 2A per phase with sufficient cooling. Key Features Supply Voltage: 8–35V DC Logic Voltage: 3–5.5V Adjustable Current Limit: For controlling motor current Microstepping: Full, 1/2, 1/4, 1/8, and 1/16 step modes STEP/DIR Interface: Simple control using a microcontroller Automatic Current Decay: Supports slow and mixed decay modes Thermal Shutdown: Helps protect the driver from excessive temperature Under-Voltage Protection: Built-in UVLO protection Short-Circuit & Ground-Fault Protection Compact Design: Easy to integrate into CNC and robotics projects Applications The A4988 is suitable for: 3D printers CNC machines Laser engravers Robotic systems Arduino projects XY/Z-axis motion systems Camera sliders DIY automation projects Stepper motor positioning systems