A4988 Stepper Motor Driver Module + Heatsink – 5 Pack – 3D Printer / Reprap / CNC

A4988 Stepper Motor Driver Module with Heatsink — 5 Pack (3D Printer / Reprap / CNC)

High-quality A4988 stepper motor driver modules (5 units) with sticky heatsinks — ideal for 3D printers, RepRap, CNC axes, robotics and DIY motion control. Supports microstepping, current limiting via onboard potentiometer and simple STEP/DIR interface.

Qty: 5 units Includes: Heatsinks Driver: A4988 Microstepping: Full/2/4/8/16

What’s Included

5 × A4988 Stepper Motor Driver Module

Key Features

Simple STEP/DIR control for bipolar stepper motors
Adjustable current limit (potentiometer) for motor protection
Microstep selection via MS1 / MS2 / MS3 pins (up to 1/16 step)
Onboard 5V regulator & protection (module-dependent)
Compact form-factor — standard breakout pinout compatible with RAMPS / CNC controllers

Item Specifics (copy/paste-ready)

Brand	Unbranded / Generic
Model	A4988 Stepper Driver Module
MPN	Does Not Apply
Type	Stepper Motor Driver
Channels	Single driver per module (bipolar)
Microstepping	Full / 1/2 / 1/4 / 1/8 / 1/16
Operating Voltage (Motor)	8V – 35V (typical; check motor & module specs)
Logic Voltage	3.3V – 5V (logic pins tolerant on many breakouts)
Condition	New
Unit Quantity	5
Country/Region of Manufacture	China

Why pick A4988?

Widespread & well-documented: classic choice for hobby 3D printers and CNC entry-level drivers.
Adjustable current limiting: protects steppers and avoids overheating drivers.
Microstepping: smoother motion and quieter operation versus full-step only drivers.
Low cost & easy to replace: ideal for prototypes, upgrades and spares.

Possible Uses

3D printer axis drivers (X / Y / Z / extruder) — RepRap / Marlin setups
Small CNC routers and engraving machines
Robotics: joint actuation and gantry drives
Automated camera sliders and pan/tilt systems
Educational projects, motor control experiments and prototyping

Wiring Diagram — ESP32 / Arduino → A4988 → Bipolar Stepper

Important wiring notes:

Motor supply (VMOT) must be suitable for your stepper (usually 8–35V). Do NOT exceed module / motor ratings.
Place a large electrolytic capacitor (100µF–470µF) across VMOT & GND to protect the driver from supply spikes.
Set the current limit via the on-board potentiometer BEFORE running the motor; use a multimeter to measure the reference voltage per A4988 datasheet.
MS1/MS2/MS3 set microstep mode (see table below); tie to GND for full step.

Microstepping table (typical)

MS1	MS2	MS3	Microstep
LOW	LOW	LOW	Full step
HIGH	LOW	LOW	Half step
LOW	HIGH	LOW	Quarter step
HIGH	HIGH	LOW	Eighth step
HIGH	HIGH	HIGH	Sixteenth step

Enhanced ESPHome Example — A4988 Stepper (ESP32)

Paste this into ESPHome; change pins and timings to suit your motor. This uses ESPHome's stepper platform for A4988 drivers (STEP/DIR interface).

Click to expand — ESPHome YAML (A4988)

# ESPHome A4988 stepper example (ESP32)
esphome:
  name: a4988_node
  platform: ESP32
  board: esp32dev

wifi:
  ssid: "YOUR_SSID"
  password: "YOUR_PASS"

logger:
api:
ota:

# Simple stepper using the A4988 (STEP/DIR)
stepper:
  - platform: a4988
    id: x_stepper
    name: "X Axis Stepper"
    step_pin: GPIO16
    dir_pin: GPIO17
    enable_pin: GPIO5        # optional: pull low to enable
    sleep_pin: GPIO18       # optional: tie high to wake
    reset_pin: GPIO19       # optional
    max_speed: 1000 steps/s
    acceleration: 200 steps/s^2
    microsteps: 16          # keep in sync with MS1/MS2/MS3 wiring

# Example: simple cover-style automation (run 200 steps forward/back on schedule)
interval:
  - interval: 1min
    then:
      - stepper.set_target:
          id: x_stepper
          target: 200
      - delay: 5s
      - stepper.set_target:
          id: x_stepper
          target: 0

# Expose a service to move absolute steps from Home Assistant
# (Home Assistant can call stepper.set_target via API)

Notes: set microsteps to match hardware MS pins. Use enable_pin to disable driver when idle (power saving / reduce heat). Always configure safe acceleration & max_speed for your motor.

Enhanced Arduino Example — AccelStepper (recommended)

This sketch uses the AccelStepper library (install via Library Manager). It supports speed, acceleration, and smooth moves.

Click to expand — Arduino sketch (AccelStepper)

// Arduino + A4988 example using AccelStepper
#include <AccelStepper.h>

// Define pins
const int stepPin = 2;    // STEP
const int dirPin  = 3;    // DIR
const int enablePin = 8;  // ENABLE (active low)

AccelStepper stepper(AccelStepper::DRIVER, stepPin, dirPin);

void setup() {
  Serial.begin(115200);
  pinMode(enablePin, OUTPUT);
  digitalWrite(enablePin, LOW); // enable driver

  stepper.setMaxSpeed(800.0);      // steps per second
  stepper.setAcceleration(200.0);  // steps per second^2
  Serial.println("A4988 AccelStepper demo ready");
}

void loop() {
  // Move to 2000 steps (e.g., one revolution * steps per rev)
  stepper.moveTo(2000);
  while (stepper.distanceToGo() != 0) {
    stepper.run();
  }
  delay(1000);

  // Move back
  stepper.moveTo(0);
  while (stepper.distanceToGo() != 0) {
    stepper.run();
  }
  delay(1000);
}

Tip: tune setMaxSpeed and setAcceleration to match your motor torque and microstep setting. Use digitalWrite(enablePin, HIGH) to disable driver.

Practical Tips & Safety

Always set current limit BEFORE running the motor — reduce VREF to safe value, use manufacturer formula for your board.
Use a decoupling capacitor across VMOT (100µF–470µF) close to the driver to prevent voltage spikes.
Keep wires short and use proper gauge for motor power. Share common ground with MCU.
A4988 can run hot — use heatsinks and consider active cooling for continuous high-current use.
For high-current or microstepping with high torque, consider DRV8825 / TMC2209 class drivers as alternatives.

SEO Keywords

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Postage & Returns

Ships from UK. Dispatch within 1 business day International shipping available via eBay Global Shipping Programme.

Returns: 30-day returns accepted. Buyer pays return postage unless the item is faulty or not as described.