In this case I called the stepper motor ‘myStepper’ but you can use other names as well, like ‘z_motor’ or ‘liftmotor’ etc. Create stepper object called 'myStepper', note the pin order: To get the correct step sequence, we need to set the pins in the following order: 8, 10, 9, 11. For this we use the function Stepper(steps, pin1, pin2, pin3, pin4) where steps is the number of steps per revolution and pin1 through pin4 are the pins to which the motor is connected. Next, you need to create a new instance of the Stepper class, which represents a particular stepper motor connected to the Arduino. This means it takes 2048 steps to rotate 360 degrees (see motor specifications above). In this example we will be using the motor in full-step mode. Next, I defined how many steps the motor takes to rotate 1 revolution. Include the Arduino Stepper.h library: More information about this library can be found on the Arduino website. The sketch starts by including the Stepper.h Arduino library. Step one revolution in the other direction: Begin Serial communication at a baud rate of 9600: Stepper myStepper = Stepper(stepsPerRevolution, 8, 10, 9, 11) With ULN2003 driver board and Arduino UNO. *Įxample sketch to control a 28BYJ-48 stepper motor This sketch turns the stepper motor 1 revolution in one direction, pauses, and then turns 1 revolution in the other direction. This example uses the Stepper.h library, which should come pre-installed with the Arduino IDE. You can upload the following example code to your Arduino using the Arduino IDE. Basic Arduino example code to control a 28BYJ-48 stepper motor The jumper next to power connections on the driver board can be used to disconnect power to the stepper motor. Note that you also need to connect the GND of the Arduino to the – pin on the ULN2003 driver board.Īfter uploading the code you also need to power the Arduino, either with a USB type-B cable or via the 5.5 mm power jack. It should come with a female DC connector, so you can easily connect it to some (jumper) wires. I recommend to power the driver board/stepper motor with an external 5 V power supply, like this one. I also found that when powering the Arduino with USB power only, I would get inconsistent behavior and bad performance of the stepper motor. When the stepper motor draws too much current you can damage the Arduino. Please note: It is possible to directly power the stepper motor from the 5 V output of the Arduino. ULN2003 and 28BYJ-48 to Arduino Connections ULN2003 Driver Board I used a breadboard and some jumper wires to connect the driver board to an external power supply. Wiring diagram for ULN2003 driver with 28BYJ-48 stepper motor and Arduino. The connections are also given in the table below. The wiring diagram/schematic below shows you how to connect the ULN2003 driver board to the 28BYJ-48 stepper motor and the Arduino. Wiring – Connecting 28BYJ-48 stepper motor and ULN2003 driver board to Arduino UNO 28BYJ-48 Stepper Motor Specifications Rated voltageįor more information you can check out the datasheet here. It has a built-in gearbox, which gives it some extra torque and reduces the speed drastically.īelow you can find the specifications for both the stepper motor and driver that are used in this tutorial. This motor is often used to automatically adjust the vanes of an air conditioner unit. Although it is not super accurate or powerful, it is a great motor to use for smaller projects or if you just want to learn about stepper motors. The 28BYJ-48 is one of the cheapest stepper motors you can find. Information about the 28BYJ-48 stepper motor and ULN2003 driver board As an Amazon Associate we earn from qualifying purchases. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to products on. Supplies Hardware componentsīreadboard (optional, makes wiring easier)ĥV power supply (powering the stepper motor directly from the Arduino can damage it!) If you have any questions, please leave a comment below. How to control a stepper motor with DRV8825 driver and Arduino.How to control a stepper motor with A4988 driver and Arduino.How to control a Stepper Motor with Arduino Motor Shield Rev3.Control a stepper motor with L298N motor driver and Arduino. Acceleration and deceleration example code Sketch to control number of steps or revolutions Example codes for 28BYJ-48 stepper motor with Arduino and AccelStepper library.Basic Arduino example code to control a 28BYJ-48 stepper motor.ULN2003 and 28BYJ-48 to Arduino Connections.Wiring – Connecting 28BYJ-48 stepper motor and ULN2003 driver board to Arduino UNO.Information about the 28BYJ-48 stepper motor and ULN2003 driver board.
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