1. Make a robotic car using a robotic kit.
2. connect motor driver, Arduino, Bluetooth module, battery, servomotor with an arm on a breadboard and fix it on the robotic car.
3. Switch it ON and test the bot by installing Bluetooth controlling application in a smart phone.

    
#include <SoftwareSerial.h>
 
#include <Servo.h>
 
SoftwareSerial BlueTooth(0,1);
 
Servo myservo;
 
int pos = 90; 
 
char BT_input;
 
int motorPin1 = 4;
 
int motorPin2 = 5; 
 
int motorPin3 = 6;
 
int motorPin4 = 7; 
 
void setup()
 
{
 
BlueTooth.begin(9600); 
 
Serial.begin(9600);
 
pinMode(motorPin1, OUTPUT);
 
pinMode(motorPin2, OUTPUT);
 
pinMode(motorPin3, OUTPUT);
 
pinMode(motorPin4, OUTPUT);
 
myservo.attach(9);
 
}
 
void loop() {
 
if (BlueTooth.available())
 
{
 
BT_input=BlueTooth.read();
 
if (BT_input=='f')//forward
 
{
 
digitalWrite(motorPin1, LOW);
 
digitalWrite(motorPin2, HIGH);
 
digitalWrite(motorPin3, HIGH);
 
digitalWrite(motorPin4, LOW);
 
Serial.println("running");
 
}
 
else if (BT_input=='b')//backward
 
{
 
digitalWrite(motorPin1, HIGH);
 
digitalWrite(motorPin2, LOW);
 
digitalWrite(motorPin3, LOW);
 
digitalWrite(motorPin4, HIGH);
 
}
 
else if (BT_input=='r')//right
 
{
 
digitalWrite(motorPin1, LOW);
 
digitalWrite(motorPin2, HIGH);
 
digitalWrite(motorPin3, LOW);
 
digitalWrite(motorPin4, LOW);
 
}
 
else if (BT_input=='l')//left
 
{
 
digitalWrite(motorPin1, LOW);
 
digitalWrite(motorPin2, LOW);
 
digitalWrite(motorPin3, HIGH);
 
digitalWrite(motorPin4, LOW);
 
}
 
else if (BT_input=='s')//stop
 
{
 
digitalWrite(motorPin1, LOW);
 
digitalWrite(motorPin2, LOW);
 
digitalWrite(motorPin3, LOW);
 
digitalWrite(motorPin4, LOW);
 
}
 
else if (BT_input=='m')
 
{
 
for (pos = 90; pos <= 180; pos += 1)
 
myservo.write(pos); 
 
}
 
else if (BT_input=='n')
 
{
 
for (pos = 180; pos >= 90; pos -= 1)
 
myservo.write(pos); 
 
}}}
 .rTable { display: table; width: 100%;} .rTableRow { display: table-row; } .rTableHeading { background-color: #ddd; display: table-header-group; } .rTableCell, .rTableHead { display: table-cell; padding: 3px 10px; border: 1px solid #999999; } .rTableHeading { display: table-header-group; background-color: #ddd; font-weight: bold; } .rTableFoot { display: table-footer-group; font-weight: bold; background-color: #ddd; } .rTableBody { display: table-row-group; }