Published July 19, 2024 © LGPL

Stepper motor control x bluetooth and app

In this tutorial we will see a circuit, which controls a stepper motor, with an application made in app inventor, using bluetooth, and the h

IntermediateProtip107

Stepper motor control x bluetooth and app

Things used in this project

Hardware components

SparkFun Arduino Pro Mini 328 - 5V/16MHz

Story

In this tutorial we will see a circuit, which controls a stepper motor, with an application made in app inventor, using bluetooth, and the hc-05 module and arduino.

Electronic components

Arduino mini pro

The Arduino Pro Mini is a microcontroller board based on the ATmega328 .It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an integrated resonator, a reset button, and holes for mounting pin headers. A six-pin header can be connected to an FTDI cable or a Sparkfun breakout board to provide USB power and communication to the board.The Arduino Pro Mini is designed for semi-permanent installation on objects or exhibits. The board comes without pre-mounted headers, allowing the use of various types of connectors or direct soldering of wires. The pin layout is compatible with the Arduino Mini.There are two versions of the Pro Mini. One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz.

hc-05 modules

Works as a bluetooth master and slave device
Configurable via AT commands
Bluetooth V2.0+EDR
Operating frequency: 2.4 GHz ISM band
Modulation: GFSK (Gaussian Frequency Shift Keying)
Transmit power: <=4dBm, Class 2
Sensitivity: <=-84dBm @ 0.1% BER
Security: Authentication and encryption
Bluetooth profiles: Bluetooth serial port.
Distance of up to 10 meters in optimal conditions
Operating Voltage: 3.6 VDC to 6 VDC
Current Consumption: 30 mA to 50 mA
Chip: BC417143
Version or firmware: 3.0-20170609
Default Baud: 38400
Supported baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200.
Interface: Serial TTL
Antenna: Integrated into the PCB
Security: Authentication and encryption (Default password: 0000 or 1234)
Working temperature (Max): 75°C
Working temperature (Min): -20°C
Dimensions: 4.4 x 1.6 x 0.7 cm

Stepper motor 28BYJ-48

The parameters of this stepper motor are:

Model: 28BYJ-48 – 5V
Nominal voltage: 5V (or 12V, value indicated on the back).
Number of phases: 4.
Speed reducer: 1/64
Step angle: 5.625° / 64
Frequency: 100Hz
DC resistance: 50Ω ±7% (25°C)
Frequency with traction: > 600Hz
Non-traction frequency: > 1000Hz
Traction torque: >34.3mN.m (120Hz)
Self-positioning torque: >34.3mN.m
Torque with friction: 600-1200 gf.cm
Torque drag: 300 gf.cm
Insulation resistance > 10MΩ (500V)
Electrical insulation: 600VAC/1mA/1s
Insulation grade: A
Temperature rise: < 40K (120Hz)
Noise: < 35dB (120Hz, no load, 10cm)

ULN2003APG

Main specifications:

500 mA nominal collector current (single output)
50V output (there is a version that supports 100V output)
Includes output flyback diodes
TTL and 5-V CMOS logic compatible inputs

Female pins

Male pins

A socket for arduino mini pro

A 100 nF ceramic disc capacitor

90 degree female pins

PCB

Download gerber file –> pcb stepper motor bluetooth

Application

Download app and source file app inventor–> app bluetooth stepper motor

Source code

#define pin2  2
#define pin3  3
#define pin4  4
#define pin5  5
#define retardo 2   

char caracter;
String cadena; 
float pasos = 0;
int datos_serial = 0;

void setup() {
  pinMode(pin2, OUTPUT);
  pinMode(pin3, OUTPUT); 
  pinMode(pin4, OUTPUT); 
  pinMode(pin5, OUTPUT);
  Serial.begin(57600); //Velocidad del módulo bluetooth
}

void loop() {
  while (Serial.available()) {  
    delay(3);                  
    char c = Serial.read(); 
    cadena += c;        
  }
 
  if (cadena.length() >0) { 
  
   Serial.println(cadena.toInt());  
    datos_serial = cadena.toInt();
    
  }
  while(datos_serial>pasos){
             
         atras();
         delayMicroseconds(40);
         pasos = pasos + 1;
    
  }
 while(datos_serial<pasos){
         
          adelante();
          delayMicroseconds(40);
          pasos = pasos - 1;
    
  }
  
  if (cadena == "SET"){
    pasos = 0;
    datos_serial = 0;
    }
 
  cadena=""; 
}
void paso1(){
  digitalWrite(pin2, HIGH); 
  digitalWrite(pin3, HIGH); 
  digitalWrite(pin4, LOW); 
  digitalWrite(pin5, LOW); 
}
void paso2(){
  digitalWrite(pin2, LOW); 
  digitalWrite(pin3, HIGH);
  digitalWrite(pin4, HIGH); 
  digitalWrite(pin5, LOW); 
}
void paso3(){
  digitalWrite(pin2, LOW); 
  digitalWrite(pin3, LOW); 
  digitalWrite(pin4, HIGH);
  digitalWrite(pin5, HIGH); 
}
void paso4(){
  digitalWrite(pin2, HIGH); 
  digitalWrite(pin3, LOW); 
  digitalWrite(pin4, LOW); 
  digitalWrite(pin5, HIGH); 
}
void pasoApagado(){
  digitalWrite(pin2, LOW); 
  digitalWrite(pin3, LOW); 
  digitalWrite(pin4, LOW); 
  digitalWrite(pin5, LOW); 
}


void adelante(){
  paso1();
  delay(retardo);
  paso2();
  delay(retardo);
  paso3();
  delay(retardo);
  paso4();
  delay(retardo);
}

void atras(){
  paso3();
  delay(retardo);
  paso2();
  delay(retardo);
  paso1();
  delay(retardo);
  paso4();
  delay(retardo);
}

Credits

carlosvolt

34 projects • 4 followers

Stepper motor control x bluetooth and app

Things used in this project

Hardware components

Story

Arduino mini pro

hc-05 modules

Code

Source code

Credits

carlosvolt

Comments

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Stepper motor control x bluetooth and app

Stepper motor control x bluetooth and app

Things used in this project

Hardware components

Story

Arduino mini pro

hc-05 modules

Code

Source code

Credits

carlosvolt

Comments

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