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Home / Motor Driver & Shield / A4988 Stepper Motor Driver
A4988 Stepper Motor Driver

The A4988 Stepper Motor Driver is a microstepping bipolar stepper motor driver capable of up to 1/16 microstepping.

A4988 Stepper Motor Driver

SKU 8004 Category Motor Driver & Shield

₹139.00

excl. GST*

Bulk deal
Quantity Discount Discounted price
10 - 19 10% ₹125.10
20 - 29 20% ₹111.20
30 + 99% ₹1.39

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  • Sensors & Modules
  • Accesories & Cables
  • Combo Products
  • Power Supply & Converters
  • Display Board & LED
  • Transistors & IC
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A4988 Stepper Motor Driver

The A4988 Stepper Motor Driver is a microstepping bipolar stepper motor driver capable of up to 1/16 microstepping. It provides smooth, precise motion control for 3D printers, CNC machines, and positioning systems.


Key Features

  • Up to 1/16 microstepping for smooth motion
  • 2A per coil max with adequate cooling
  • Adjustable current limiting via potentiometer
  • Multiple step resolutions: full, 1/2, 1/4, 1/8, 1/16
  • Protections: over-temperature, over-current, short-circuit
  • STEP/DIR interface for simple control
  • Auto current decay mode detection

Technical Specifications

Parameter Specification
Model A4988 (Pololu-compatible)
Motor Type Bipolar stepper
Max Current 1A per coil (2A with heatsink)
Microstepping Full, 1/2, 1/4, 1/8, 1/16
Logic Voltage 3.3V – 5V
Motor Voltage 8V – 35V
Interface STEP, DIR, ENABLE, MS1-MS3
Protection Thermal shutdown, overcurrent
Dimensions 15mm x 20mm

Applications

  • 3D printer control (RAMPS, Rumba boards)
  • CNC machine axes
  • Camera sliders and dollies
  • Automated dispensers
  • Positioning tables
  • Precision linear actuators

Important Notes

  • CRITICAL: Adjust current limit BEFORE connecting motor – measure Vref
  • Formula: Current Limit = Vref × 2.5 (for standard 0.05Ω sense resistors)
  • Heatsink + fan REQUIRED for currents above 1A
  • Enable pin is active LOW – leave disconnected to enable
  • Do not disconnect motor while powered – will destroy driver
  • MS1, MS2, MS3 pins set microstep resolution (see datasheet)

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Comming soon !!!