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A4988 Stepper Motor Driver Module
The A4988 Stepper Motor Driver Module is a microstepping driver designed for controlling bipolar stepper motors. It offers adjustable current limiting, over-current and over-temperature protection, and five different microstep resolutions (down to 1/16-step). This module is widely used in 3D printers, CNC machines, and robotics.
📄 Datasheet
🖼️ Product Images
📐 Specifications
| Parameter | Value |
|---|---|
| Minimum Operating Voltage | 8 V |
| Maximum Operating Voltage | 35 V |
| Continuous Current per Phase | 1 A |
| Maximum Current per Phase | 2 A (with sufficient cooling) |
| Logic Voltage Range | 3 V – 5.5 V |
| Microstep Resolutions | Full, 1/2, 1/4, 1/8, 1/16 |
| Dimensions | 15.5 × 20.5 mm (0.6″ × 0.8″) |
| Weight | 1.3 g |
🔌 Pin Configuration
- VMOT – Motor power supply (8–35 V)
- GND – Ground
- VDD – Logic voltage (3–5.5 V)
- 1A, 1B, 2A, 2B – Motor coil connections
- STEP – Step control input
- DIR – Direction control input
- MS1, MS2, MS3 – Microstep resolution selection
- ENABLE – Enable/disable outputs
- RESET – Reset input
- SLEEP – Sleep mode input
⚙️ Features
- Simple step and direction control interface
- Adjustable current control via potentiometer
- Over-temperature thermal shutdown
- Under-voltage lockout
- Crossover-current protection
- Short-to-ground and shorted-load protection
- Configurable for mixed decay mode
🧰 Applications
- 3D Printers
- CNC Machines
- Robotics
- Automated Machinery
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