DRV8825 stepper motor driver module — 1/32 microstepping, for 3D printer and CNC

The DRV8825 is a Texas Instruments-based stepper motor driver module capable of driving bipolar stepper motors with up to 1/32 microstepping resolution. It is a direct drop-in upgrade over the A4988, offering finer step resolution and higher current capacity, making it the go-to driver for 3D printers, CNC machines, laser engravers, and precision motion control projects.

Key Specifications:

• Driver IC: Texas Instruments DRV8825
• Motor supply voltage: 8.2V – 45V
• Logic supply voltage: 3.3V – 5V
• Output current: up to 2.2A continuous, 2.5A peak (with heatsink)
• Microstepping modes: full, 1/2, 1/4, 1/8, 1/16, 1/32
• Built-in overcurrent protection
• Thermal shutdown protection
• Under-voltage lockout (UVLO)
• Short-circuit protection
• Adjustable current limit via onboard potentiometer
• Compatible with 3.3V and 5V logic systems

Microstepping Configuration (MODE0, MODE1, MODE2 pins):

• 000 → Full step
• 001 → Half step
• 010 → 1/4 step
• 011 → 1/8 step
• 100 → 1/16 step
• 111 → 1/32 step

Pinout (standard 2×8 header):

• VMOT, GND: Motor power supply
• B2, B1, A1, A2: Stepper motor coil connections
• DIR, STEP: Direction and step control inputs
• SLEEP, RESET: Sleep and reset control
• MODE0, MODE1, MODE2: Microstepping selection
• FAULT: Fault output (active low)
• EN: Enable input (active low)

Compatible With:

• RAMPS 1.4 / 1.6 3D printer boards
• Arduino Uno, Mega, Nano
• CNC Shield v3
• Any STEP/DIR stepper controller

Applications:

• FDM 3D printers (X, Y, Z, extruder axes)
• CNC routers and milling machines
• Laser engravers
• Telescope mounts and camera sliders
• Precision robotics and automation

Note: Always set the current limit before connecting a motor. Attach the included heatsink for currents above 1.5A. Never connect or disconnect the motor while the driver is powered.