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A3967 Easy Driver Stepper Motor Driver V4.4+Pin Header For Arduino

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Description

Revolutionize Your Projects with the A3967 Easy Driver Stepper Motor Driver V4.4 for Arduino

Unleash the power of precision motor control and microstepping capabilities with the cutting-edge A3967 Easy Driver Stepper Motor Driver V4.4. Designed for simplicity and performance, this driver is a game-changer for a wide range of applications, from CNCs to robots, and even household appliances. Seamlessly compatible with any source emitting a digital 0 to 5V pulse (or 0 to 3.3V pulse with 3/5V pads soldered), it offers unparalleled flexibility.

Key Features:

🔧 Versatile Microstepping: Elevate your control with microstepping options. Customize the microstepping resolution to your needs with the MS1 and MS2 pins of the A3967. Choose from full, half, quarter, and eighth steps, opening doors to precision like never before.

🔌 Enhanced Compatibility: This powerhouse driver effortlessly handles 4, 6, and 8 wire bipolar stepper motors, including popular NEMA 17 models. Whether you’re delving into DIY projects or complex CNC machines, compatibility is never an issue.

⚙️ Adjustable Current Control: Fine-tune your stepper motor’s performance with ease. Tailor the current control to your desired range, from 150mA/phase to 750mA/phase, ensuring optimal efficiency.

🌐 GRBL Compatibility: Seamlessly integrate with the Arduino GRBL G-code interpreter to command 3-axis CNC machines with precision and finesse.

🧰 Breadboard Friendly: With conveniently designed pins, enjoy a hassle-free integration process compatible with breadboards, making experimentation and prototyping a breeze.

🔋 Flexible Power Supply: Harness the power of a 7V to 30V supply, enabling you to drive stepper motors with varying voltage needs. Experience enhanced torque at high speeds by utilizing a higher voltage supply.

⚠️ Cautionary Note: Handle with care. Avoid connecting or disconnecting a motor while the driver is energized, as it could lead to irreversible damage to the A3967 IC.

Specifications:

  • Precision Microstepping Driver: A3967 technology at your fingertips.
  • Dimensions: Compact design with a board length of 48mm and width of 20mm.

Unlock the future of motor control with the latest A3967 Easy Driver Stepper Motor Driver V4.4. Elevate your projects and experiments to new heights, from robotics to CNC creations. Transform your vision into reality with this exceptional stepper motor driver. Don’t settle for less – achieve precision and control like never before. Order now and revolutionize your projects!

📌 Code Examples & Usage – A3967 EasyDriver Stepper Motor Driver v4

📋 Overview

The A3967 EasyDriver v4 is a compact stepper motor driver designed to make driving bipolar stepper motors simple and reliable. It supports microstepping, onboard current limiting, and requires only STEP and DIR control signals from a microcontroller.

It is ideal for:

  • CNC and motion control projects

  • Robotics and automation

  • Linear actuators and lead screw drives

  • Arduino, ESP32 & Raspberry Pi projects

  • Prototyping small machines and mechanisms

⚙ Key Features

  • Driver IC: Allegro A3967

  • Motor type: Bipolar stepper motors

  • Supply voltage (motor): 7–30V

  • Logic voltage: 3.3V – 5V

  • Microstepping support

  • Onboard adjustable current limiting

  • Simple STEP / DIR interface

  • Compact form factor

⚠ IMPORTANT – Motor & Power Notes

🚨 This board is NOT for unipolar motors

✔ Use 4-wire bipolar stepper motors
✔ Common motors: NEMA 14 / NEMA 17 (low current)
✔ Maximum phase current is limited — check motor specs

📌 Always power the motor from an external supply, not from Arduino 5V.

🔌 Pinout (4-Pin Control Header)

Pin Function
STEP Step pulse input
DIR Direction control
GND Logic ground
VCC Logic supply (3.3V–5V)

Additional pins on the board:

  • A+, A−, B+, B− → Stepper motor coils

  • M+ / GND → Motor power (7–30V)

  • MS1 / MS2 → Microstep selection

  • ENABLE → Enable/disable driver (active LOW)

🔌 Wiring – Arduino Uno Example

Control Wiring

EasyDriver Arduino
STEP D2
DIR D3
VCC 5V
GND GND

Motor Power

  • M+ → External supply (e.g. 12V)

  • GND → Power supply ground

📌 Motor power ground and Arduino ground must be common.

🔌 Stepper Motor Wiring

A 4-wire bipolar motor connects as:

Motor Wire EasyDriver
Coil A A+ / A−
Coil B B+ / B−

📌 If the motor vibrates but does not turn, swap one coil pair.

🧪 Basic Arduino Example – Rotate Stepper Motor

const int stepPin = 2;
const int dirPin = 3;

void setup() {
pinMode(stepPin, OUTPUT);
pinMode(dirPin, OUTPUT);

digitalWrite(dirPin, HIGH); // set direction
}

void loop() {
for (int i = 0; i < 200; i++) { // 200 steps = 1 rev (full-step motor)
digitalWrite(stepPin, HIGH);
delayMicroseconds(800);
digitalWrite(stepPin, LOW);
delayMicroseconds(800);
}

delay(1000);
digitalWrite(dirPin, !digitalRead(dirPin)); // reverse direction
}

🧪 Speed Control Example

void stepMotor(int steps, int speedDelay) {
for (int i = 0; i < steps; i++) {
digitalWrite(stepPin, HIGH);
delayMicroseconds(speedDelay);
digitalWrite(stepPin, LOW);
delayMicroseconds(speedDelay);
}
}

void loop() {
stepMotor(400, 1000); // slow
delay(1000);
stepMotor(400, 400); // faster
delay(1000);
}

📌 Smaller delay = higher speed.

🎚 Microstepping Configuration

MS1 MS2 Step Mode
LOW LOW Full step
HIGH LOW Half step
LOW HIGH Quarter step
HIGH HIGH Eighth step

📌 Microstepping improves smoothness but reduces torque per step.

⚙ Current Limit Adjustment (VERY IMPORTANT)

🚨 Always set the current limit before running your motor

  1. Power the EasyDriver

  2. Do not connect the motor initially

  3. Use a small screwdriver to adjust the trimpot

  4. Increase slowly until the motor runs smoothly

  5. Stop if the motor or driver becomes hot

📌 This protects both the motor and the driver.

🔋 Power & Cooling Notes

  • Use 7–30V motor supply

  • Higher voltage = better high-speed torque

  • Ensure airflow if running continuously

  • Do not exceed motor current rating

🧠 Common Issues & Fixes

Issue Cause Fix
Motor vibrates only Coil order wrong Swap one coil pair
Driver overheats Current too high Reduce current limit
No movement STEP not pulsing Check wiring & code
Random steps Noise Shorten STEP/DIR wires
Weak torque Microstepping Reduce microstep setting

Additional information

Weight 20 g
Dimensions 260 × 160 × 20 mm

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