ULN2003 5-12V Stepper Motor Driver Module

Contents hide

1 Hardware Overview of ULN2003 Module

3 Features and Specifications of ULN2003 5-12V

Stepper motor plays a prominent role in various electronic and robotic applications. We use the stepper motor for correct positioning in different circuits. For example, in robotics arms, antennas, telescopes, etc. These motors may run at high speeds but have a high holding torque. But, these motors require a driver circuit. And, for this reason, there are many types of drivers which are available in the electronic market. This article is about the ULN2003 5-12V Stepper Motor Driver.

Hardware Overview of ULN2003 Module

The module comprises ULN2003 IC which is one of the most frequently used stepper Motor driver IC used when one needs to drive the loads having high current. For example, digital logic circuits, Timers, Gates, etc. Since some motors that require 9V and 300mA to run cannot be powered by the microcontroller and therefore we use this IC to source enough current and voltage for the load.
The board also includes a connector thatch makes it very easy to connect the motor to the module board. Moreover, there are connections for four control inputs and power supply connections.
Also, the board has four LEDs that indicate the work on the four control input lines

But Now

Working Principle

The working basis of this driver circuit is to control the stepper motor by delivering current using different phases in pulses in the motor’s direction. The designers rarely use the wave driving technique because of reasons like it presents small torque and is inefficient.

Features and Specifications of ULN2003 5-12V

Features

ULN2003A motor driver chip
Chip all the pins already leads for easy connection to use

Specifications

5-12V power supply
4-way signal indicator
Step angle: 5.625 x 1 / 64
Reduction ratio: 1 / 64
Phase: 4
Current / Phase: 5V

Pinouts

Pin Name	Description
IN1	Pin used to drive the motor. Connect it to a digital output pin of the microcontroller.
IN2	Pin used to drive the motor. Connect it to a digital output pin of the microcontroller.
IN3	Pin used to drive the motor. Connect it to a digital output pin of the microcontroller.
IN4	Pin used to drive the motor. Connect it to a digital output pin of the microcontroller.
GND	Common ground pin
VCC	pin supplies power for the motor.
Motor Connector	This is where the motor plugs into. The connector is keyed, so it only goes in one way.