ELEGOO 5 sets 28BYJ-48 5V Stepper Motor + ULN2003 Motor Driver Board for Arduino

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You’ll need the ULN2003 to drive the stepper motor with the Arduino. They are also easily accessible at an affordable price. It’s better to grab one of these rather than breadboarding the IC itself. The next loop function is where we will write our code to drive the motor. For the first line of the loop, we set the speed of one revolution to one per minute.

In the setup, besides the maximum speed, we also need to define the acceleration/deceleration. For this, we use the function setAcceleration(). void setup() {

The third motor was glued to a 6cm piece of plastic which was attached to the second motor and exactly like other motors, this motor’s coupler was also made from Ballpoint. First, lets see the little steppers in action! Our main character, StepperBot, is “instructed” to move in a square path on my coffee table, making 90 degree turns at the corners. Turning exactly at the right time and by the right angle is critical avoid falling off and crashing on the floor in an embarrassing pile of messy wires. Open your Arduino IDE and go to File > New. A new file will open. Copy the code given below in that file and save it. Of course it's easier if you have access to a small lathe (such as Sherline or one of the small Chinese ones). We will start by importing the Pin class from the machine module and the sleep class from the time module. from machine import Pin

In the loop I make use of a while loopin combination with the currentPosition()function. First, I set the current position of the stepper motor to zero with stepper.setCurrentPosition(0). // Set the current position to 0: The jumper next to power connections on the driver board can be used to disconnect power to the stepper motor. A stepper motor can move in accurate, fixed angle increments known as steps. For practical purposes, a stepper motor is a bit like a servo: you can tell it to move to a pre-defined position and can count on getting fairly consistent results with multiple repetitions. Servos though, are usually limited to a 0-180 degree range, while a stepper motor can rotate continuously, similar to a regular DC motor. The advantage of steppers over DC motors is that you can achieve much higher precision and control over the movement. The downside of using steppers is that they are a bit more complex to control than servos and DC motors. The 28BYJ-48 Stepper Motor Datasheet The first part of the code up to the loop() section is exactly the same as in the previous example. But since we are at the initial learning stage of familiarizing ourselves with the setup, we will be powering the motor from the Arduino in this example to keep the connections simple. Once you have familiarized yourself with the connections, be sure to connect your motor to an external power source instead if more power is needed.Thia 28BYJ-28 stepper motor is imported from one of our trusted suppliers and the supplier has guaranteed the quality of these compact stepper motors. These kind of motors are commonly used in your DVD drives, Motion camera and other similar applications. The motor has a 4 coil unipolar arrangement and each coil is rated for +5V hence it is relatively easy to control with any basic microcontrollers. These motors has a stride angle of 5.625°/64, this means that the motor will have to make 64 steps to complete one rotation and for every step it will cover a 5.625° hence the level of control is also high. However, these motors run only on 5V and hence cannot provide high torque, for high torque application you should consider the Nema17 motors. So if you are looking for a compact easy to use stepper motor with decent torque then this motor is the right choice for you. The orange and pink wires represent coil 1 and should be wired to 1A and 1B on the A4988. The yellow and blue wires represent coil 2 and should be wired to 2A and 2B. We set a delay of one second. In the next two lines, we do the same thing again – setting the number of revolutions per minute and commanding the stepper to do a number of steps. However, this time, we set the speed to 6 rounds per minute and move the shaft in the other direction by setting a negative number of steps. This means that the motor will move 6 times faster, and should complete a full revolution in about 10s (60s / 6 = 10s). To use a 28BYJ-28 stepper motor with ESP32 board we will be required to attach it with the ULN2003 motor driver. This is necessary because the current consumption of 28BYJ-48 is around 240mA. That means the current required to drive coils by applying a sequence of control signals is also almost 200mA. GPIO pins of ESP development boards can not provide current of this magnitude. Therefore, we need a ULN2003 driver which translates low current output of ESP32 GPIO pins into higher current that meets the requirement of stepper motor control signals.