A4988 Stepper Motor Driver

Supply Voltage : 8-35 VDC.
Current : 1.0A (no heatsink ).
Current : 2.0A (with heat-sinking).
logic input : 3 – 5.5V .
Automatic current decay mode detection / choice.
Mixed with slow current decay mode.

SKU: A4988 Categories: Motor Drivers, Motors | Drivers | Pumps | Actuators Tags: A4988 datasheet, A4988 driver Pinout, A4988 driver price, A4988 microstepping, A4988 schematic, A4988 stepper motor driver Arduino, A4988 stepper motor driver connection, A4988 stepper motor driver datasheet pdf, Motor Drivers, Motors, Stepper Motor

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Description

The A4988 driver Stepper Motor Driver is a complete micro-stepping motor driver with built-in converter, easy to operate. It operates from 8 V to 35 V and can deliver up to approximately 1 A per phase without a heat sink or forced air flow (it is rated for 2 A per coil with sufficient additional cooling).

A4988 driver Stepper Motor Driver includes a fixed off-time current regulator, the regulator can be in slow or mixed decay mode. The converter is the key to the easy implementation of the A4988.

There are no phase sequence tables, the high-frequency control interface programming etc. The application of A4988 interface is very suitable for a complex microprocessor is not available or overload. In the stepping operation, the chopping control in the A4988 automatically selects the current decay mode (slow or mixed). The mix decay current control scheme can reduce the audible motor noise, increased step accuracy, and reduced power consumption.

Provide internal synchronous rectification contr

ol circuitry, in order to improve the pulse width modulation (PWM) power consumption during operation.

Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout (UVLO) and crossover current protection. Don’t need special power-up sequencing. A4988 uses surface mount QFN package (ES), the size is 5 mm × 5 mm, nominal overall package height is 0.90 mm, with an exposed thermal pad to enhance the heat dissipation function.

Features :

Automatic current decay mode detection/choice.
Mixed with slow current decay mode.
The low power dissipation of synchronous rectifier.
Internal UVLO(ultra voltage lockout).
Crossover current protection.
Thermal shutdown circuit.
Ground fault protection.
Loading and short circuit protection.
The optional five-step mode: full, 1/2, 1/4, 1/8 and 1/16.

Package Includes :

1 x A4988 Stepper Motor Driver- Normal quality.

1 x Heat sink.

🔌

Pin Connections

1 Table

Pin Connections Table 1

Board	Sensor Pin	Connection
A4988	STEP/DIR	board digital pin / board digital pin

📟

A4988 Stepper Motor Driver

7 Examples • C/C++ | Boards: Arduino Uno, Arduino Nano, Arduino Mega, ESP32, ESP8266, STM32, Raspberry Pi Pico

Wrap

A4988 Stepper Motor Driver - Arduino Uno

A4988 Stepper Motor Driver - Arduino Nano

A4988 Stepper Motor Driver - Arduino Mega

A4988 Stepper Motor Driver - ESP32

A4988 Stepper Motor Driver - ESP8266

A4988 Stepper Motor Driver - STM32

A4988 Stepper Motor Driver - Raspberry Pi Pico

📄 File: a4988_stepper_motor_driver_-_arduino_uno.inoArduino Uno

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1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// A4988: STEP=3, DIR=4 on Arduino Uno. Motor power comes from the driver's own VMOT supply, not the microcontroller.

6#define STEP_PIN 3

7#define DIR_PIN 4

9void setup() {

10 Serial.begin(115200);

11 pinMode(STEP_PIN, OUTPUT);

12 pinMode(DIR_PIN, OUTPUT);

13}

15void loop() {

16 digitalWrite(DIR_PIN, HIGH);

17 for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step

18 digitalWrite(STEP_PIN, HIGH);

19 delayMicroseconds(800);

20 digitalWrite(STEP_PIN, LOW);

21 delayMicroseconds(800);

22 }

23 delay(500);

25 digitalWrite(DIR_PIN, LOW);

26 for (int i = 0; i < 200; i++) {

27 digitalWrite(STEP_PIN, HIGH);

28 delayMicroseconds(800);

29 digitalWrite(STEP_PIN, LOW);

30 delayMicroseconds(800);

31 }

32 delay(500);

33}

📄 File: a4988_stepper_motor_driver_-_arduino_nano.inoArduino Nano

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1//ekostra.com

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5// A4988: STEP=3, DIR=4 on Arduino Nano. Motor power comes from the driver's own VMOT supply, not the microcontroller.

6#define STEP_PIN 3

7#define DIR_PIN 4

9void setup() {

10 Serial.begin(115200);

11 pinMode(STEP_PIN, OUTPUT);

12 pinMode(DIR_PIN, OUTPUT);

13}

15void loop() {

16 digitalWrite(DIR_PIN, HIGH);

17 for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step

18 digitalWrite(STEP_PIN, HIGH);

19 delayMicroseconds(800);

20 digitalWrite(STEP_PIN, LOW);

21 delayMicroseconds(800);

22 }

23 delay(500);

25 digitalWrite(DIR_PIN, LOW);

26 for (int i = 0; i < 200; i++) {

27 digitalWrite(STEP_PIN, HIGH);

28 delayMicroseconds(800);

29 digitalWrite(STEP_PIN, LOW);

30 delayMicroseconds(800);

31 }

32 delay(500);

33}

📄 File: a4988_stepper_motor_driver_-_arduino_mega.inoArduino Mega

814 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// A4988: STEP=3, DIR=4 on Arduino Mega. Motor power comes from the driver's own VMOT supply, not the microcontroller.

6#define STEP_PIN 3

7#define DIR_PIN 4

9void setup() {

10 Serial.begin(115200);

11 pinMode(STEP_PIN, OUTPUT);

12 pinMode(DIR_PIN, OUTPUT);

13}

15void loop() {

16 digitalWrite(DIR_PIN, HIGH);

17 for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step

18 digitalWrite(STEP_PIN, HIGH);

19 delayMicroseconds(800);

20 digitalWrite(STEP_PIN, LOW);

21 delayMicroseconds(800);

22 }

23 delay(500);

25 digitalWrite(DIR_PIN, LOW);

26 for (int i = 0; i < 200; i++) {

27 digitalWrite(STEP_PIN, HIGH);

28 delayMicroseconds(800);

29 digitalWrite(STEP_PIN, LOW);

30 delayMicroseconds(800);

31 }

32 delay(500);

33}

📄 File: a4988_stepper_motor_driver_-_esp32.inoESP32

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1//ekostra.com

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5// A4988: STEP=26, DIR=27 on ESP32. Motor power comes from the driver's own VMOT supply, not the microcontroller.

6#define STEP_PIN 26

7#define DIR_PIN 27

9void setup() {

10 Serial.begin(115200);

11 pinMode(STEP_PIN, OUTPUT);

12 pinMode(DIR_PIN, OUTPUT);

13}

15void loop() {

16 digitalWrite(DIR_PIN, HIGH);

17 for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step

18 digitalWrite(STEP_PIN, HIGH);

19 delayMicroseconds(800);

20 digitalWrite(STEP_PIN, LOW);

21 delayMicroseconds(800);

22 }

23 delay(500);

25 digitalWrite(DIR_PIN, LOW);

26 for (int i = 0; i < 200; i++) {

27 digitalWrite(STEP_PIN, HIGH);

28 delayMicroseconds(800);

29 digitalWrite(STEP_PIN, LOW);

30 delayMicroseconds(800);

31 }

32 delay(500);

33}

📄 File: a4988_stepper_motor_driver_-_esp8266.inoESP8266

813 characters

1//ekostra.com

2//electronics store in egypt

3//+201008896258

5// A4988: STEP=D5, DIR=D6 on ESP8266. Motor power comes from the driver's own VMOT supply, not the microcontroller.

6#define STEP_PIN D5

7#define DIR_PIN D6

9void setup() {

10 Serial.begin(115200);

11 pinMode(STEP_PIN, OUTPUT);

12 pinMode(DIR_PIN, OUTPUT);

13}

15void loop() {

16 digitalWrite(DIR_PIN, HIGH);

17 for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step

18 digitalWrite(STEP_PIN, HIGH);

19 delayMicroseconds(800);

20 digitalWrite(STEP_PIN, LOW);

21 delayMicroseconds(800);

22 }

23 delay(500);

25 digitalWrite(DIR_PIN, LOW);

26 for (int i = 0; i < 200; i++) {

27 digitalWrite(STEP_PIN, HIGH);

28 delayMicroseconds(800);

29 digitalWrite(STEP_PIN, LOW);

30 delayMicroseconds(800);

31 }

32 delay(500);

33}

📄 File: a4988_stepper_motor_driver_-_stm32.inoSTM32

815 characters

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5// A4988: STEP=PB0, DIR=PB1 on STM32. Motor power comes from the driver's own VMOT supply, not the microcontroller.

6#define STEP_PIN PB0

7#define DIR_PIN PB1

9void setup() {

10 Serial.begin(115200);

11 pinMode(STEP_PIN, OUTPUT);

12 pinMode(DIR_PIN, OUTPUT);

13}

15void loop() {

16 digitalWrite(DIR_PIN, HIGH);

17 for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step

18 digitalWrite(STEP_PIN, HIGH);

19 delayMicroseconds(800);

20 digitalWrite(STEP_PIN, LOW);

21 delayMicroseconds(800);

22 }

23 delay(500);

25 digitalWrite(DIR_PIN, LOW);

26 for (int i = 0; i < 200; i++) {

27 digitalWrite(STEP_PIN, HIGH);

28 delayMicroseconds(800);

29 digitalWrite(STEP_PIN, LOW);

30 delayMicroseconds(800);

31 }

32 delay(500);

33}

📄 File: a4988_stepper_motor_driver_-_raspberry_pi_pico.inoRaspberry Pi Pico

823 characters

1//ekostra.com

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3//+201008896258

5// A4988: STEP=14, DIR=15 on Raspberry Pi Pico. Motor power comes from the driver's own VMOT supply, not the microcontroller.

6#define STEP_PIN 14

7#define DIR_PIN 15

9void setup() {

10 Serial.begin(115200);

11 pinMode(STEP_PIN, OUTPUT);

12 pinMode(DIR_PIN, OUTPUT);

13}

15void loop() {

16 digitalWrite(DIR_PIN, HIGH);

17 for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step

18 digitalWrite(STEP_PIN, HIGH);

19 delayMicroseconds(800);

20 digitalWrite(STEP_PIN, LOW);

21 delayMicroseconds(800);

22 }

23 delay(500);

25 digitalWrite(DIR_PIN, LOW);

26 for (int i = 0; i < 200; i++) {

27 digitalWrite(STEP_PIN, HIGH);

28 delayMicroseconds(800);

29 digitalWrite(STEP_PIN, LOW);

30 delayMicroseconds(800);

31 }

32 delay(500);

33}

Project Notes:

Step/direction bipolar stepper driver, up to 1/16 microstepping.

Specification

WeightWeight	40 g
Dimensions	4 × 3 × 3 cm
model-series	A4988 Series
voltage-rating-v	8 to 35VDC
current-rating-a	1 to 2
logic-voltage-v	3 ~ 5.5
current-a-w-o-heatsink	1A
current-a-with-heatsink	2A