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📘 Stepper Motor Driver Shield – User Manual

1. Overview

This module is a Stepper Motor Driver Expansion Board (Shield) designed to easily connect a stepper driver module (A4988, DRV8825, etc.) with microcontrollers such as Arduino.

Power Input: 12V ~ 24V DC
Supported Drivers: A4988, DRV8825 (pin-compatible)
Supported Motors: Bipolar stepper motors (2-phase)
Applications: CNC, 3D printers, robotics, automation

2. Board Components

No.	Component	Description
1	Power Terminal (Green)	12–24V DC input (VCC, GND)
2	Driver Socket (Red headers)	Slot for A4988 or DRV8825 module
3	Electrolytic Capacitor (100µF / 35V)	Power stabilization
4	DIP Switch (MS1, MS2, MS3)	Microstepping configuration
5	Motor Connector (White, 4-pin)	Stepper motor connection
6	Control Pins (Yellow/Red headers)	EN, STEP, DIR, GND input signals
7	Mounting Holes (M3)	PCB fixing holes

3. Pin Description

(1) Control Pins (Yellow/Red headers)

Pin	Description
EN (Enable)	Enables driver output (LOW = Enabled, HIGH = Disabled)
DIR (Direction)	Controls motor rotation direction (HIGH = CW, LOW = CCW)
STEP	Pulse input for stepping
GND	Ground reference

(2) Motor Output (White 4-pin Connector)

Pin No.	Connection
1	Motor coil A+
2	Motor coil A-
3	Motor coil B+
4	Motor coil B-