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.
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
8
9voidsetup() {
10Serial.begin(115200);
11pinMode(STEP_PIN, OUTPUT);
12pinMode(DIR_PIN, OUTPUT);
13}
14
15voidloop() {
16digitalWrite(DIR_PIN, HIGH);
17for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step
18digitalWrite(STEP_PIN, HIGH);
19delayMicroseconds(800);
20digitalWrite(STEP_PIN, LOW);
21delayMicroseconds(800);
22 }
23delay(500);
24
25digitalWrite(DIR_PIN, LOW);
26for (int i = 0; i < 200; i++) {
27digitalWrite(STEP_PIN, HIGH);
28delayMicroseconds(800);
29digitalWrite(STEP_PIN, LOW);
30delayMicroseconds(800);
31 }
32delay(500);
33}
📄 File: a4988_stepper_motor_driver_-_raspberry_pi_pico.inoRaspberry Pi Pico
823 characters
1//ekostra.com
2//electronics store in egypt
3//+201008896258
4
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
8
9voidsetup() {
10Serial.begin(115200);
11pinMode(STEP_PIN, OUTPUT);
12pinMode(DIR_PIN, OUTPUT);
13}
14
15voidloop() {
16digitalWrite(DIR_PIN, HIGH);
17for (int i = 0; i < 200; i++) { // 200 steps = 1 full revolution on a 1.8deg/step motor at full-step
18digitalWrite(STEP_PIN, HIGH);
19delayMicroseconds(800);
20digitalWrite(STEP_PIN, LOW);
21delayMicroseconds(800);
22 }
23delay(500);
24
25digitalWrite(DIR_PIN, LOW);
26for (int i = 0; i < 200; i++) {
27digitalWrite(STEP_PIN, HIGH);
28delayMicroseconds(800);
29digitalWrite(STEP_PIN, LOW);
30delayMicroseconds(800);
31 }
32delay(500);
33}
Step/direction bipolar stepper driver, up to 1/16 microstepping.
نظرة عامة ومواصفات المنتج — بالعربية
A4988 Stepper Motor Driver متوفر الآن في متجر إكوسترا للإلكترونيات، ضمن قسم Motor Drivers وMotors | Drivers | Pumps | Actuators، بسعر 75,00 EGP. كود المنتج لدينا: EK389. المنتج متوفر في المخزون وجاهز للشحن الفوري لكل محافظات مصر مع إمكانية الدفع عند الاستلام.
أهم المواصفات الفنية:
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
الوزن: 4 g
منتج أصلي بجودة مضمونة من إكوسترا، مع دعم فني ومتابعة بعد البيع لكل عملائنا في مصر.