Friday, May 4, 2018

Arduino Train - How to make an Arduino Controlled Model Train

In this post I found this instructable that makes a beautiful yet easy useful toy for your kids.

Today I found an Arduino controlled model train that you can move using your phone.

We have seen how it's so easy to control devices using Arduino and Bluetooth module.

This projects implements that idea.

It uses Arduino Nano as a controller and HC-06 Bluetooth module to connect to the smartphone.

Then the train is driver by the L293D H-Bridge.

Components
Arduino Nano
HC-06 Bluetooth Module
L293D H-Bridge

Connections

Circuit

Code

// ARDUINORAILMAKET.RU
// SimpleСmdStation.ino
// 05.02.2017
// Author: Steve Massikker

//// GPIO PINS ////

// L298
#define ENA_PIN 3
#define IN1_PIN 4
#define IN2_PIN 5

//// VARIABLES ////
boolean stringComplete = false;
String inputString = "";


void setup() {
  
  // Initialize Serial
  Serial.begin(9600);
  inputString.reserve(16);
  
  // Initialize Motor Driver
  pinMode(ENA_PIN, OUTPUT);
  pinMode(IN1_PIN, OUTPUT);
  pinMode(IN2_PIN, OUTPUT);

}

void loop() {

  if (stringComplete) {

    // ----------- START COMMAND PARSING ----------- //
    
    //THROTTLE
    
    if (inputString.charAt(0) =='t') {
      if (inputString.charAt(1) =='0') {
        analogWrite(ENA_PIN, 0);
      }
      if (inputString.charAt(1) =='1') {
        analogWrite(ENA_PIN, 80);
      }
      if (inputString.charAt(1) =='2') {
        analogWrite(ENA_PIN, 100);
      }
      if (inputString.charAt(1) =='3') {
        analogWrite(ENA_PIN, 150);
      }
      if (inputString.charAt(1) =='4') {
        analogWrite(ENA_PIN, 200);
      }
      if (inputString.charAt(1) =='5') {
        analogWrite(ENA_PIN, 255);
      }
    }

    // DIRECTION

    if (inputString.charAt(0) =='d') {
      if (inputString.charAt(1) =='r') {
        digitalWrite(IN1_PIN, HIGH);
        digitalWrite(IN2_PIN, LOW);
      }
      if (inputString.charAt(1) =='f') {
        digitalWrite(IN1_PIN, LOW);
        digitalWrite(IN2_PIN, HIGH);
      }
      if (inputString.charAt(1) =='s') {
        digitalWrite(IN1_PIN, LOW);
        digitalWrite(IN2_PIN, LOW);
        analogWrite(ENA_PIN, 0);
      }
    }

    //TEST

    if (inputString.charAt(0) =='j') {
      if (inputString.charAt(1) =='a') {
        digitalWrite(LED_BUILTIN, HIGH);
      }
      if (inputString.charAt(1) =='b') {
        digitalWrite(LED_BUILTIN, LOW);
      }
    }

// ----------- END COMMAND PARSING ----------- //

inputString = "";
stringComplete = false;

  }
}

// ----------- FUNCTIONS ----------- //

void serialEvent() {
  while (Serial.available() ) {
    char inChar = (char)Serial.read();
    inputString += inChar;
      if (inChar == 'z') {
      stringComplete = true;
    }
  }
}

Source : Instructables

Saturday, March 17, 2018

Connect Arduino Via Bluetooth

In this post I'll show you how to connect your Arduino board to Bluetooth module.

Bluetooth is an easy type of connection that can be configured quickly and with minimum code so you can concentrate on your application.

HC-06 Bluetooth module is the one I've tried myself.

This module communicates with Arduino the same way as any serial device.

You can use the softserial() function to send commands to the module.

Then the module sends them wireless via Bluetooth signals.

You can use this module to control your mobile phone via Arduino or send data to it.