HOW TO MAKE AN SMARTPHONE CONTROLLED CAR USING ARDUINO?

SPC*C

So now that we know how to use the Bluetooth module and the H-Bridge we can start off making our own smartphone-controlled Arduino car, and for the ones who didn’t understand what SPC*C is, it means smartphone controlled car.

GETTING STARTED

We will need the following parts

1.Arduino Uno.

2.HC-05.

3.L298D H-Bridge driver.

4. Motors 500RPM(4 nos.).

5. A 12 v battery(lead-acid battery).

6. Be creative with the body and make something as a body for your car.

Maybe something as crazy as this car here.

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THE CONNECTIONS

• For two motors, the connection is way simpler. You connect the two motors to the two output pins of the H-Bridge motor driver.
• Or, you can just do your connections as shown in the picture below.

P.S: If you want to do a 4 wheeled Arduino car you would want to first connect two motors on either side and you would check if the motors attached to the same side move in the same direction. i.e if both the motors move in clockwise or anti-clockwise directions if the current is supplied.

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The Code

#include<SoftwareSerial.h>
const int in1= 6;
const int in2= 5;
const int in3= 4;
const int in4= 3;
char i ;
void setup()
{
Serial.begin(9600);
pinMode(in1,OUTPUT);
pinMode(in2,OUTPUT);
pinMode(in3,OUTPUT);
pinMode(in4,OUTPUT);
}

void loop()
{

if(Serial.available()>0)
{
delay(100);
i=Serial.read();
if(i==’b’)
{
digitalWrite(in1,LOW);
digitalWrite(in2,HIGH);
digitalWrite(in3,HIGH);
digitalWrite(in4,LOW);
}
if(i==’r’)
{
digitalWrite(in1,HIGH);
digitalWrite(in2,LOW);
digitalWrite(in3,LOW);
digitalWrite(in4,LOW);
}

if(i==’l’)
{
digitalWrite(in1,LOW);
digitalWrite(in2,LOW);
digitalWrite(in3,LOW);
digitalWrite(in4,HIGH);

}

if(i==’f’)
{
digitalWrite(in1,HIGH);
digitalWrite(in2,LOW);
digitalWrite(in3,LOW);
digitalWrite(in4,HIGH);
}

if(i==’s’)
{

digitalWrite(in1,LOW);
digitalWrite(in2,LOW);
digitalWrite(in3,LOW);
digitalWrite(in4,LOW);
}
}
}

With some tweaks with the HIGHS  and LOWS, you can make your arduino car, that is controlled by your smart phone.

PS: If you want to know what the code means or you have any other doubts, please Dm me on Instagram(h_jain_23) or leave a mail at robotherapyy@gmail.com