Data Sheet

Lesson 14 Stepper Motor

Overview

In this lesson, you will learn how to control a stepper motor.

Components Required

Name Qty Name Qty

UNO R3 or MEGA 2560 1 Stepper Motor 1

ULN2003 Stepper Motor

Driver Module

1 9V1A Adapter 1

Power Supply Module 1 DuPont Wire 12

Breadboard 1

Component Introduction

A stepper motor divides a full rotation into a number of discrete steps. The

motor's position can then be commanded to move and hold at one of these

steps. Once stopped, the stepper holds the load steady with a holding torque.

Most stepper motors employ a doubly salient design with teeth on both the

rotor and stator structures. Like a brushless DC or permanent magnet

synchronous motor, the permanent magnets are on the rotor and the

electromagnets are in the stator.

UNO R3 board or MEGA 2560 board cannot directly drive stepper motor, so

we choose an ULN2003 driver board. There are four LEDs on the module. The

white socket in the middle is for connecting a stepper motor.