Arduino - Bluetooth Controlled RC Car

It's a 3-wheel car using Arduino, L293D and Bluetooth module which is controlled by Android phones.

BeginnerWork in progress3 hours15,776

Things used in this project

Hardware components

Arduino UNO

HC-05 Bluetooth Module

L293D Motor Driver Module

DC motor

Chassis

Jumper wires (generic)

9V battery

9V Battery Clip

9V to Barrel Jack Connector

Software apps and online services

Arduino IDE

Bluetooth RC Controller App

Story

Connections:

Motor Driver: Use L293D based motor driver module

9V for powering Motor.

5V from arduino to power L293D IC

Short all grounds from 9V battery and arduino.

Bluetooth Module:

Arduino Bluetooth Module

RX <----------------> TX

TX <----------------> RX

5V <----------------> VCC

GND <----------------> GND

Install 'Bluetooth RC Controller' From google playstore.

NB: First Connect Bluetooth device from mobile directly (name: HC-05, password: 1234). Then connect to device from the installed application.

Logic used in Motor controls

Code

Arduino Code

/*ARDUINO BLUETOOTH RC CAR: 
SIGIoT TKMCE
Author: Abhinand A S
Date: 8/11/2018
 */
 
int motorRightA = 5;    //Right Motor-clockwise
int motorRightB = 6;   //Right Motor-anticlockwise
int motorLeftA = 11;    //Left Motor-clockwise
int motorLeftB = 12;    //Left Motor-clockwise

char bt = 0;       //BT 
/*-----------------------------------------------------------------------------------------------------*/

void setup()
{
  Serial.begin(9600);
  
  pinMode(motorRightA,OUTPUT);
  pinMode(motorRightB,OUTPUT);
  pinMode(motorRightB,OUTPUT);
  pinMode(motorLeftB,OUTPUT);
}
void loop()
{
  if (Serial.available() > 0)
  {
    bt = Serial.read();
    digitalWrite(led, 1);
    /*_________________________________________________________________________________________________*/
    
    if(bt == 'F')        //move forwards
    {
      digitalWrite(motorRightA, HIGH);
      digitalWrite(motorRightB, LOW);
      digitalWrite(motorLeftA,  HIGH);
      digitalWrite(motorLeftB, LOW);
    }
    else if (bt == 'B')       //move backwards
    {
      digitalWrite(motorRightA, LOW);
      digitalWrite(motorRightB, HIGH);
      digitalWrite(motorLeftA, LOW);
      digitalWrite(motorLeftB, HIGH);
    }
    else if (bt == 'S')     //stop!!
    {   
      digitalWrite(motorRightA, LOW);
      digitalWrite(motorRightB, LOW);
      digitalWrite(motorLeftA, LOW);
      digitalWrite(motorLeftB, LOW);
    }
    else if (bt == 'R')    //right
    {
      digitalWrite(motorRightA, HIGH);
      digitalWrite(motorRightB, LOW);
      digitalWrite(motorLeftA, LOW);
      digitalWrite(motorLeftB, LOW);
    }
    else if (bt == 'L')     //left
    {
      digitalWrite(motorRightA, LOW);
      digitalWrite(motorRightB, LOW);
      digitalWrite(motorLeftA, HIGH);
      digitalWrite(motorLeftB, LOW);
    }
    else if (bt == 'I')    //forward right
    {
      digitalWrite(motorRightA, HIGH);
      digitalWrite(motorRightB, LOW);
      digitalWrite(motorLeftA, LOW);
      digitalWrite(motorLeftB, HIGH);
    }
    else if (bt == 'G')    //forward left
    {
      digitalWrite(motorRightA, LOW);
      digitalWrite(motorRightB, HIGH);
      digitalWrite(motorLeftA, HIGH);
      digitalWrite(motorLeftB, LOW);
   }

      
    }
  
  }