Controling 28BYJ-48 Stepper Motor With Arduino and Fly Sky

Hello. I've made this circuit for my RC Sailing model. My goal was to precisly rotate the masts of the model with adjustable speed. I decide to use 28BJ-48 Stepper motor and uln 2003 Driver. Rc ransmiter i used is flysky Fs-i6X and FS 10IAB receiver. You will need also Arduino board. I used arduino nano.

-Fly sky-I6X transmitter

-FS 10IAB reciver

-28BJ-48 Stepper motor

-uln 2003 Driver

-Arduino Nano

-5 v power supply, or any other and 5 v regulator.

The code is simple, it only uses 5 pins on the arduino board. Library "Stepper.h" is used.

Pin Number 3 is responsible for reading data from the Rc transmitter. Pins 8,9,10,11 control the operation of stepper motors.

#include <Stepper.h>

const int stepsPerRevolution = 2038;

int channel_2 = 3;  // pin to connect receiver

Stepper myStepper = Stepper(stepsPerRevolution, 8, 10, 9, 11); //pins to stepper controler

void setup()

{

  pinMode(channel_2, INPUT);

  Serial.begin(9600);

}

void loop() {

  int value = pulseIn(channel_2, HIGH, 25000);

  if(value==0)

  {

  myStepper.setSpeed(0); //standby

  myStepper.step(0);

  }

  else if(value > 1800)  //rotate cw

  {

      myStepper.setSpeed(10);

  myStepper.step(stepsPerRevolution);

  }

  else if(value < 1200) // rotate ccw

  {

       myStepper.setSpeed(10);

  myStepper.step(-stepsPerRevolution);

  }

  }

Connect the VIN and gnd pins to 5v power. We can use a higher voltage, but you will need a 5v voltage regulator as stepper motors is rated for 5v. Pin 3 connect with ch2 (signal) Pin 8 - in1 Pin9 - in2 Pin 10-in3 Pin 11-in4  To organize everything, it is worth using a universal PCB. I used a 5x7cm tile. I connected everything using connectors and gold pins.

I've made video of builiding all project, Here is Code and electronics chapter.

https://www.youtube.com/watch?v=iMCD9L0SLgg&t=572s