Electric motors are the heart of modern electronics, robotics, industrial automation, CNC machines, 3D printers, AGVs, conveyor systems, and IoT projects. However, a microcontroller such as an Arduino Uno, Arduino Mega, ESP32, or Raspberry Pi Pico cannot directly power most motors because its GPIO pins are designed to deliver only a small amount of current.

This is where motor driver modules become essential. A motor driver acts as the interface between the microcontroller and the motor, allowing low-power control signals from the Arduino to safely drive motors that require higher voltage and current.

Whether you're controlling a small DC motor, a NEMA 17 stepper motor, or a high-current industrial motor, selecting the correct motor driver is critical for achieving reliable performance, efficient power delivery, and long hardware life.

In this guide, we'll compare five of the most popular Arduino-compatible motor drivers:

• L298N Dual H-Bridge Driver
• TB6612FNG Dual Motor Driver
• BTS7960 High Current Motor Driver
• A4988 Stepper Motor Driver
• DRV8825 Stepper Motor Driver

You'll learn how each driver works, its voltage and current ratings, compatible motors, Arduino wiring, sample code, advantages, disadvantages, and practical applications.

What Is a Motor Driver?

A motor driver is an electronic circuit that receives low-current control signals from a microcontroller and supplies the required voltage and current to a motor.

Think of the Arduino as the brain and the motor driver as the muscle.

Without a motor driver, an Arduino cannot safely power most motors because each GPIO pin can supply only around 20 mA (40 mA absolute maximum) at 5V (Arduino Uno) or 3.3V (many modern boards).

Most motors require:

• 6V–48V operating voltage
• Hundreds of milliamps to tens of amps
• Bidirectional current flow
• PWM speed control
• High startup current

Motor drivers handle all of these requirements while protecting both the microcontroller and the motor.

Why Can't Arduino Drive a Motor Directly?

One of the biggest mistakes beginners make is connecting a motor directly to an Arduino output pin.

This can permanently damage the Arduino because motors draw significantly more current than a GPIO pin can safely provide.

Arduino Uno Output Capability

Typical Motor Requirements

As shown above, there is a huge difference between what an Arduino can supply and what a motor requires.

Motor drivers bridge this gap safely.

How Does a Motor Driver Work?

A motor driver receives three main inputs:

• Direction signals
• PWM speed control
• Enable signal

It then switches power from an external supply to the motor using transistors or MOSFETs.

The driver provides:

• Forward rotation
• Reverse rotation
• Speed control
• Current amplification
• Electrical isolation
• Protection circuits

This allows the Arduino to control powerful motors without directly supplying the motor current.

Types of Motor Drivers

Motor drivers generally fall into two categories.

1. H-Bridge Motor Drivers

Designed primarily for brushed DC motors.

Examples:

• L298N
• TB6612FNG
• BTS7960

Capabilities:

• Forward direction
• Reverse direction
• PWM speed control
• Dual motor support (L298N & TB6612FNG)
• High current support (BTS7960)

Applications:

• Robot cars
• Conveyor systems
• Electric vehicles
• Home automation
• DC pumps
• Smart doors

2. Stepper Motor Drivers

Designed specifically for bipolar stepper motors.

Examples:

• A4988
• DRV8825

Capabilities:

• Microstepping
• Accurate positioning
• Step and Direction control
• Current limiting
• Smooth motion

Applications:

• CNC Machines
• 3D Printers
• Laser Engravers
• Camera Sliders
• Pick and Place Machines
• Robotic Arms

Complete Specification Comparison

*Actual usable current depends on cooling, heatsinks, airflow, and current-limit adjustment.

Voltage Comparison

Each motor driver supports a different supply voltage range.

Best Voltage Support

🥇 DRV8825 — Up to 45V

Best for Low Voltage Projects

🥇 TB6612FNG

Current Comparison

Current capability determines the size of the motor a driver can safely operate.

Best High Current Driver

🥇 BTS7960

Ideal for:

• Electric vehicles
• Heavy robotics
• Large conveyors
• Winches
• Industrial automation

Which Driver Is Used for Which Motor?

Choosing the correct driver depends on three key factors:

• Motor Type (DC or Stepper)
• Operating Voltage
• Current Requirement

Selecting a driver with insufficient current capacity can lead to overheating, missed steps (for steppers), unstable operation, or permanent damage.

Complete Driver Specifications, Wiring & Arduino Code

In this section, we'll examine each motor driver individually, covering its working principle, electrical specifications, Arduino wiring, complete Arduino code, advantages, disadvantages, and recommended applications.

L298N Dual H-Bridge Motor Driver

The L298N is one of the most popular motor drivers for Arduino projects. It is designed to control two brushed DC motors or one bipolar stepper motor and is commonly used in educational robotics, robot cars, conveyor systems, and automation projects.

Although it is an older bipolar transistor-based design, it remains a favorite due to its affordability and ease of use.

Key Features

• Dual H-Bridge Driver
• Controls 2 DC Motors
• Controls 1 Bipolar Stepper Motor
• PWM Speed Control
• Direction Control
• Easy Arduino Interface
• Onboard 5V Regulator (module dependent)

Electrical Specifications

Pin Description

Arduino Wiring

Arduino Code

const int ENA=5;
const int IN1=6;
const int IN2=7;

void setup()
{
pinMode(ENA,OUTPUT);
pinMode(IN1,OUTPUT);
pinMode(IN2,OUTPUT);
}

void loop()
{

digitalWrite(IN1,HIGH);
digitalWrite(IN2,LOW);
analogWrite(ENA,180);

delay(3000);

digitalWrite(IN1,LOW);
digitalWrite(IN2,HIGH);

delay(3000);

}

Advantages

✔ Easy to use

✔ Low cost

✔ Widely available

✔ Excellent for beginners

✔ Supports PWM

Limitations

✖ Lower efficiency

✖ Generates more heat

✖ Voltage drop due to bipolar transistors

Best Applications

• Robot Cars
• DC Fans
• Conveyor Belts
• Educational Projects
• Small Automation Systems

TB6612FNG Dual Motor Driver

The TB6612FNG is a modern MOSFET-based motor driver that is significantly more efficient than the L298N. It produces less heat, offers lower voltage loss, and is ideal for battery-powered robotics.

Key Features

• Dual H-Bridge
• MOSFET Technology
• High Efficiency
• Battery Friendly
• PWM Speed Control
• Reverse Direction

Electrical Specifications

Arduino Wiring

Arduino Code

const int PWMA=5;
const int AIN1=6;
const int AIN2=7;

void setup()
{

pinMode(PWMA,OUTPUT);
pinMode(AIN1,OUTPUT);
pinMode(AIN2,OUTPUT);

}

void loop()
{

digitalWrite(AIN1,HIGH);
digitalWrite(AIN2,LOW);

analogWrite(PWMA,200);

delay(3000);

}

Advantages

✔ Higher efficiency than L298N

✔ Low heat generation

✔ Ideal for battery-powered robots

✔ Compact size

Limitations

✖ Lower maximum voltage

✖ Not suitable for high-current industrial motors

Best Applications

• Mini Robots
• Line Following Robots
• Arduino Cars
• Battery Projects
• STEM Kits

BTS7960 High Current Driver

The BTS7960 is a powerful MOSFET-based H-Bridge driver designed for high-current DC motors. It is widely used in industrial automation, electric vehicles, robotic platforms, and conveyor systems.

Key Features

• High Current Driver
• MOSFET Technology
• PWM Control
• Reverse Direction
• Thermal Protection
• Overcurrent Protection

Electrical Specifications

Arduino Wiring

Arduino Code

const int RPWM=5;
const int LPWM=6;

void setup()
{

pinMode(RPWM,OUTPUT);
pinMode(LPWM,OUTPUT);

}

void loop()
{

analogWrite(RPWM,200);

analogWrite(LPWM,0);

delay(3000);

analogWrite(RPWM,0);

analogWrite(LPWM,200);

delay(3000);

}

Advantages

✔ Extremely high current

✔ Industrial quality

✔ MOSFET efficiency

✔ Heavy-duty applications

Limitations

✖ Larger physical size

✖ Requires external power supply

Best Applications

• Electric Vehicles
• Conveyor Systems
• AGVs
• Heavy Robots
• Winches
• Industrial Automation

A4988 Stepper Driver

The A4988 is one of the most widely used drivers for NEMA 17 stepper motors. It supports microstepping, adjustable current limiting, and smooth motion, making it ideal for CNC machines, laser engravers, and 3D printers.

Key Features

• Step & Direction Interface
• Adjustable Current Limit
• Microstepping up to 1/16
• Thermal Protection
• Overcurrent Protection

Electrical Specifications

Arduino Wiring

Arduino Code

#define STEP_PIN 2
#define DIR_PIN 3

void setup()
{

pinMode(STEP_PIN,OUTPUT);
pinMode(DIR_PIN,OUTPUT);

}

void loop()
{

digitalWrite(DIR_PIN,HIGH);

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

digitalWrite(STEP_PIN,HIGH);
delayMicroseconds(800);

digitalWrite(STEP_PIN,LOW);
delayMicroseconds(800);

}

delay(1000);

}

Best Applications

• CNC Machines
• 3D Printers
• Plotters
• Camera Sliders
• Pick and Place Machines

DRV8825 Stepper Driver

The DRV8825 is an enhanced stepper motor driver with higher voltage support, greater current capability, and finer microstepping than the A4988. It is commonly used in professional CNC routers, laser cutters, and advanced robotics.

Key Features

• Step & Direction Interface
• Microstepping up to 1/32
• Adjustable Current Limit
• Thermal Shutdown
• Overcurrent Protection

Electrical Specifications

Arduino Wiring

Arduino Code

#define STEP_PIN 2
#define DIR_PIN 3

void setup()
{

pinMode(STEP_PIN,OUTPUT);
pinMode(DIR_PIN,OUTPUT);

}

void loop()
{

digitalWrite(DIR_PIN,HIGH);

for(int i=0;i<400;i++)
{

digitalWrite(STEP_PIN,HIGH);
delayMicroseconds(500);

digitalWrite(STEP_PIN,LOW);
delayMicroseconds(500);

}

delay(1000);

}

Advantages

✔ Higher voltage support

✔ Better torque at higher speeds

✔ Up to 1/32 microstepping

✔ Excellent for precision motion

Limitations

✖ Requires careful current-limit adjustment

✖ Needs good cooling under high loads

Best Applications

• CNC Routers
• Professional 3D Printers
• Laser Engravers
• Precision Robotics
• Industrial Motion Control

Driver Selection, Real Projects, FAQs & Complete Buying Guide

Which Motor Driver Should You Choose?

Selecting the right motor driver depends on four important factors:

• Motor Type
• Operating Voltage
• Current Requirement
• Required Precision

The following guide helps you quickly identify the best driver for your project.

Driver Recommendation by Motor

Driver Recommendation by Current

Driver Recommendation by Voltage

Real Projects Using These Motor Drivers

These motor drivers are widely used in hobby, educational, commercial, and industrial electronics.

Robot Car

Recommended Driver

✅ L298N

Alternative

✅ TB6612FNG

Motor

• TT Gear Motor
• DC Gear Motor

Smart Line Following Robot

Recommended Driver

✅ TB6612FNG

Reason

Low power consumption and high efficiency.

Robotic Arm

Recommended Driver

✅ DRV8825

Motor

NEMA17

Reason

Smooth positioning and excellent accuracy.

CNC Machine

Recommended Driver

✅ DRV8825

Reason

Supports high voltage and fine microstepping.

3D Printer

Recommended Drivers

• A4988
• DRV8825

Used For

• X Axis
• Y Axis
• Z Axis
• Extruder

Conveyor Belt

Recommended Driver

✅ BTS7960

Reason

Supports high-current industrial motors.

Automatic Gate

Recommended Driver

✅ BTS7960

Motor

24V DC Gear Motor

Electric Vehicle

Recommended Driver

✅ BTS7960

Reason

Handles very high motor current safely.

Camera Slider

Recommended Driver

✅ A4988

Motor

NEMA17

Reason

Accurate movement with smooth microstepping.

Pick and Place Machine

Recommended Driver

✅ DRV8825

Reason

Excellent precision and repeatability.

Best Practices for Motor Driver Projects

Following these practices will improve reliability and extend the life of both your motor driver and motor.

Always Use an External Power Supply

Never power medium or high-power motors directly from the Arduino's 5V pin.

Share a Common Ground

Connect the Arduino GND and motor driver's GND together. A shared reference is essential for stable communication.

Set the Current Limit

For A4988 and DRV8825, adjust the current limit before connecting the motor to prevent overheating and missed steps.

Add a Heat Sink

Drivers operating near their current limits should use a heat sink and, if necessary, active cooling.

Match Voltage and Current Ratings

Choose a driver that comfortably exceeds your motor's requirements to provide a safety margin.

Check Wiring Before Powering On

Verify motor phases, polarity, and power connections to avoid damaging the driver or motor.

Common Problems & Solutions

Frequently Asked Questions (FAQs)

Which motor driver is best for beginners?

The L298N is beginner-friendly due to its simple wiring and widespread community support.

Which driver is the most efficient?

The TB6612FNG uses MOSFET technology, resulting in lower heat and better efficiency than the L298N.

Which driver is suitable for industrial motors?

The BTS7960 is designed for high-current applications up to 43A, making it suitable for many industrial and heavy-duty projects.

Which driver should I use for a NEMA 17 stepper motor?

Both the A4988 and DRV8825 are suitable. Choose the DRV8825 if you need higher voltage support or finer microstepping.

Can I connect a motor directly to an Arduino?

No. Most motors require significantly more current than an Arduino GPIO pin can safely provide. Always use an appropriate motor driver.

Can one driver control multiple motors?

• L298N: Up to two DC motors.
• TB6612FNG: Up to two DC motors.
• BTS7960: Typically one high-current DC motor.
• A4988 / DRV8825: One bipolar stepper motor per driver.

Related Products

Explore these products on Chip.pk to build your robotics and automation projects:

• Arduino Uno R3 ATmega328P Development Board
• Arduino Mega 2560 R3
• Raspberry Pi Pico 2
• Raspberry Pi Pico 2 W
• L298N Dual H-Bridge Motor Driver
• TB6612FNG Dual Motor Driver Module
• BTS7960 43A High-Power Motor Driver
• A4988 Stepper Motor Driver
• DRV8825 Stepper Motor Driver
• NEMA 17 Stepper Motor
• 28BYJ-48 Stepper Motor with ULN2003 Driver
• SG90 Micro Servo Motor
• MG996R High Torque Servo Motor
• TT DC Gear Motor
• DC Geared Motor Series
• Breadboards
• Jumper Wire Kits
• DC Power Supply Modules

Continue Learning & Explore More Resources

📘 Original Article (Chip.pk Knowledge Hub)

Read the complete guide with detailed explanations, comparison tables, Arduino code, wiring diagrams, and product recommendations.

💻 GitHub Repository

Access the complete Arduino sketches, wiring diagrams, documentation, and project resources.

🛠️ Hackster.io Project

Follow the hands-on implementation with practical examples and hardware guidance.

✍️ Medium Article

Read the concise developer-focused version of this comparison.

👨💻 DEV Community (DEV.to)

Explore additional Arduino programming examples and embedded systems insights.