Project Hub /Robotics & Autonomous Systems/Motor Drivers & Motion Control/Control Unipolar & Bipolar Steppers with L293D Motor Driver IC & Arduino

Beginner

ARDUINO

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

Control Unipolar & Bipolar Steppers with L293D Motor Driver IC & Arduino

Learn how to control both unipolar and bipolar stepper motors (like 28BYJ-48 and NEMA 17) using an L293D motor driver IC and an Arduino.

Originally published on LastMinuteEngineers

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

L298N Dual H-Bridge Motor Driver Module – 2A Rs. 195.00
A4988 driver Stepper Motor Driver Rs. 125.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Arduino (unspecified board)

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How It Works

This project enables an Arduino board to precisely control either a unipolar stepper motor (such as the 28BYJ-48) or a bipolar stepper motor (such as the NEMA 17) using an L293D motor driver IC. Stepper motors rotate in precise angular increments, or steps, by sequentially energizing internal electromagnetic coils. Because the digital input/output pins on an Arduino Uno cannot supply the higher voltage and current required by these motor coils, the L293D acts as an essential intermediary power interface. Controlled via software written in the Arduino IDE and connected through jumper wires, the Arduino sends low-power step and direction command signals to the L293D. The L293D processes these logic signals and draws from an external power supply to deliver the necessary current through its internal H-bridge driver channels to the motor windings. By switching these channels on and off in a precise sequence, the motor shaft turns smoothly to exact positions.

Why Build This

Understand how microcontroller logic signals can control higher-power electromechanical actuators.

Gain practical experience wiring and programming both unipolar and bipolar stepper motors for precise positioning.

Build foundational knowledge applicable to constructing small CNC machines, 3D printers, and automated robotics.

Real-World Application

Used in CNC machines, 3D printers, small robotic vehicles, and automated positioning systems.

Skills You'll Learn

Stepper motor control sequencing

H-bridge driver operation

motor power management

microcontroller digital output interfacing

circuit wiring and breadboarding

Safety Precautions

Ensure that the correct power supply voltage is matched to the specific stepper motor (e.g., 5V for 28BYJ-48, 12V for NEMA 17) and common all ground connections.

Technology Tags

STEPPER MOTOR

L293D

H-BRIDGE

28BYJ-48

NEMA 17

MOTOR DRIVER

ARDUINO STEPPER LIBRARY

Frequently Asked Questions

Can I power the stepper motor directly from the Arduino's 5V pin?

No, stepper motors draw more current than the Arduino's onboard regulator can safely supply, which can cause the board to reset or overheat. You should use a separate external power supply matched to your specific motor and ensure all grounds are connected together.

What is the difference between wiring a unipolar and a bipolar motor to the L293D?

A unipolar motor like the 28BYJ-48 often uses a 5-wire setup where common power lines are tied together, while a bipolar NEMA 17 motor typically uses a 4-wire configuration driven fully by two H-bridge channels on the L293D.

Do I need to install any special libraries in the Arduino IDE?

While you can write custom step sequences using basic digital writes, the standard Arduino environment includes or allows easy installation of stepper libraries that simplify managing the rotation steps and speed.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

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