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.
Controlling a stepper motor like the 28BYJ-48 with an Arduino involves bridging low-level digital control signals with higher-current inductive loads using the ULN2003 driver board. The Arduino board runs software built in the Arduino IDE, utilizing the Arduino Stepper Library to sequence digital pulses sent out via jumper wires. Because the Arduino's digital output pins cannot supply enough current to drive the motor windings directly and risk damaging the microcontroller, these control signals are routed to the ULN2003 driver board. The ULN2003 contains an array of Darlington transistor pairs that act as high-current electronic switches. Powered by an external 5V power supply with a shared common ground, the driver board draws power from this external source and switches it across the motor's unipolar coils based on the sequence received from the Arduino. As the transistors systematically energize and de-energize the internal electromagnets in a precise sequence, the permanent magnet rotor steps through exact rotational increments, allowing for accurate position and speed control.
Why Build This
Develop foundational undergraduate-level competence in interfacing microcontrollers with inductive electromechanical loads.
Implement precise angular position and rotational speed control algorithms for automation hardware like robotic joints and CNC axes.
Analyze power management principles by safely isolating logic-level circuitry from higher-current motor drive rails.
Real-World Application
Window blinds, 3D printers, security cameras, CNC machines, and robotic arms.
Skills You'll Learn
Inductive load driving
Darlington transistor switching
unipolar stepper motor sequencing
microcontroller GPIO interfacing
external power distribution and ground referencing
Safety Precautions
Use a separate 5V power source for the motor instead of drawing power directly from the Arduino, and ensure a common ground to prevent voltage spikes and hardware damage.
Technology Tags
STEPPER MOTOR
28BYJ-48
ULN2003
ARDUINO
STEPPER LIBRARY
ACCELSTEPPER
MOTOR DRIVER
Frequently Asked Questions
Stepper motors draw more current than the Arduino's onboard regulator can safely supply, which can cause voltage drops, system resets, or permanent damage to the microcontroller.
A common ground ensures that both the Arduino and the ULN2003 driver share a consistent zero-voltage reference point, allowing the control logic signals to be accurately interpreted.
No, the project utilizes the built-in Arduino Stepper Library within the Arduino IDE, which abstracts the step sequencing logic into straightforward functions.
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.
A4988 driver Stepper Motor Driver
Rs. 247.00
Jumper Wire 10 Pin Male To Male 20cm
Rs. 45.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi
Rs. 139.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality
Rs. 89.00
Jumper Wire 10 Pin Male To Female 20cm
Rs. 45.00
