The DRV8825 Stepper Motor Driver Module is a microstepping driver designed to control bipolar stepper motors. It is widely used in 3D printers, CNC machines, robotics, and other motion control applications. This module is popular for its versatility, efficiency, and ability to handle high currents.

Key Features:

1. Microstepping Capability:

   • Supports up to 1/32 microstepping, which provides smoother and more precise control over stepper motors.

2. Wide Operating Voltage Range:

   • Compatible with motor supply voltages from 8.2V to 45V, allowing for a wide range of applications.

3. High Current Handling:

   • Can deliver up to 1.5A per phase without a heatsink and up to 2.2A per phase with proper cooling.

4. Adjustable Current Control:

   • Includes a potentiometer to set the current limit, protecting the motor and driver from damage.

5. Thermal Protection:

   • Features over-temperature, over-current, and short-to-ground protection.

6. Pin Compatibility:

   • Compatible with Pololu A4988 Stepper Motor Driver modules, making it a drop-in replacement for many setups.

Technical Specifications:

• Driver IC: DRV8825
• Microstepping Levels: Full-step, 1/2, 1/4, 1/8, 1/16, and 1/32
• Control Interface: Step and Direction Pins
• Logic Voltage: 3.3V or 5V
• Motor Voltage: 8.2V–45V
• Maximum Current: 2.2A per coil (with adequate cooling)
• Dimensions: ~15mm x 20mm

Pinout:

1. VMOT: Motor power supply (8.2V–45V)
2. GND: Ground connection
3. 2B, 2A, 1A, 1B: Motor connections
4. STEP: Step signal input
5. DIR: Direction signal input
6. ENABLE: Enable/disable motor (optional)
7. MS1, MS2, MS3: Microstepping resolution configuration
8. VDD: Logic power supply (3.3V/5V)

Microstepping Configuration:

Current Limiting:

To adjust the current limit:

1. Measure the reference voltage (Vref) on the potentiometer.
2. Use the formula: $$I_{\text{limit}} = V_{\text{ref}} \times 2$$ where $I_{\text{limit}}$ is in amps.

Applications:

• 3D Printers
• CNC Machines
• Robotics
• Precision Motion Control