The ULN2003 Stepper Motor Driver Board Module is a compact and versatile motor driver module designed for controlling stepper motors with ease. Here's a description highlighting its key features and functionality:

Key Features:

1. ULN2003A Motor Driver Chip: Equipped with the ULN2003A motor driver chip, this module provides reliable and efficient control over stepper motors.

2. Wide Power Supply Range: Compatible with DC power supplies ranging from 5V to 12V, offering flexibility in various applications.

3. 4-Way Signal Indicator: Includes a 4-way signal indicator, allowing users to monitor the status of the stepper motor driver board conveniently.

4. Step Angle and Reduction Ratio: Features a step angle of 5.625 x 1 / 64 and a reduction ratio of 1 / 64, enabling precise control and smooth movement of stepper motors.

5. Phase and Current: Supports 4-phase stepper motors and provides a current per phase suitable for 5V operation.

BASIC CHARACTERISTICS

Let’s face it, motors can be found in various devices that we use every day. Printers, laptops, washing machines, electric shavers, quadcopters and many more. Still, there’s a really small human percentage who know how to work with them. Best and simplest way to learn something is when we actually have a real example. That’s why we love Dasduino and “How to use” tutorials.

28BYJ-48 stepper motor characteristics:
Voltage: 5V
Angle of a turn: 5.625°
Spin ratio: 64
Frequency: 100HZ
For more info, check out the datasheet

WHAT AND HOW DOES A STEPPER MOTOR WORK?

The working principle of the stepper motor will be discussed in the example of the 28-BYJ48 unipolar stepper motor.

BYJ-48 stepper motor from inside.
Stepper motor rotates the moving part with precise steps at certain time intervals. The pulse is sent to the coil series (our motor has 4 coils) that make the ring around the rotor, but those are static so that part of the motor we call the stator. Engine precision is expressed by the number of steps the engine is doing to make a full circle, 360 °. We can calculate it from the formula: a number of steps = (360 ° / degree of a single spin) * spin ratio. The example of our stepper is: (360 ° / 5.625 °) * 64 = 4096 steps.

image source wikipedia.
The working principle can be seen at .gif above. Each stepper motor works in such a way that the coil series in the stator “turn on” alternately in the direction in which we want to rotate the motor, or they are not changing their condition if we want the engine to idle.

HOW TO CONNECT MODULE WITH DASDUINO?

We will connect the stepper motor to the ULN driver, which we’ll connect to Dasduino. The picture shows the parts of the ULN2003 module. For more info, check out the datasheet.

Frequently asked questions (FAQ):

1. What is the ULN2003 Stepper Motor Driver Board Module used for?

   The ULN2003 module is used to control stepper motors in various applications such as robotics, automation systems, 3D printers, CNC machines, and more.

2. What stepper motor types are compatible with this module?

   The ULN2003 module is compatible with 4-phase stepper motors, commonly used in small to medium-sized projects requiring precise motor control.

3. What is the power supply requirement for the ULN2003 module?

   The module is compatible with DC power supplies ranging from 5V to 12V, providing flexibility in different projects and setups.

4. How does the 4-way signal indicator function?

   The 4-way signal indicator provides visual feedback on the status of the stepper motor driver board, allowing users to monitor its operation conveniently.

5. Can the ULN2003 module handle overcurrent protection?

   Yes, the ULN2003 module includes overcurrent protection, ensuring the safety of both the module and the connected stepper motor during operation.

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