Stepper motor 28BYJ-48 5V with driver ULN2003 (set)

The 4-phase stepper motor is the basis of precision robotics. Unlike constant rotation motors, one revolution of a stepper motor consists of many micro-movements, which are called steps.

There are two suspension lugs on the motor housing for mounting.

The stepper motor is controlled using programs written in the Arduino controller or in another microprocessor control device. Each active phase turns on its own LED. Diodes are marked on the board D1 - D4.

The gearbox ratio is 64:1, which allows you to get quite decent torque for a motor of this size at a speed of about 15 rpm. With some software tricks for gradual acceleration, more than 25 rpm can be reached.

The 4-phase stepper motor has a 5-pin interface for connecting power and control signal. Each pin is color-coded 1-Blue (blue), 2-Pink (pink), 3-Yellow (yellow), 4-Orange (orange), 5-Red (red). Contacts 1,2,3,4 - for connecting the corresponding phases. Contact 5 - common for all phases.

There is also a jumper on the side (two pins under four resistors), the installation of which allows you to supply power to the stepper motor. Note that it is not recommended to power the motor from the 5V Arduino, as it can draw more current than the Arduino can handle. It is better to use an external power supply that provides at least 1A current. The four control inputs are labeled IN1-IN4 and must be connected to the Arduino's four digital outputs.

Connect pins IN1, IN2, IN3 and IN4 to pins 3, 4, 5 and 6 of the Arduino Uno. The positive contact of the power supply must be connected to the terminal marked “+”, and the ground of the power supply to the “-” terminal on the controller board. If different power supplies are used to power the Arduino and the motor, it is necessary to connect the ground pins of the power supplies together.

The ULN2003 stepper motor driver allows you to work with both 5V and 12V motors. Compatible with Arduino Stepper standard library.

Module Specifications:

Supply voltage, V 5
Maximum current consumption, mA 320
Number of steps 64
Number of microsteps 4096
Number of phases 4
Pitch, ° 5.625
Frequency, Hz 100
Idling frequency (clockwise), Hz 600
Idling frequency (counterclockwise), Hz 1000
Torque, N/m 34.3
Thrust, g/cm 343

Scheme for connecting the module to Arduino Uno: