Today, ı wil made a RC Car with arduino UNO and some supplys. You can easly make your RC CAR and have fun. Let's look steps...

Step 1: PARTS

Here is a list of parts that i used to make this project:

Arduino UNO
HC 05 Bluetooth Module
L298 Motor Driver
2*DC Motor
On/Off Switch
Jumper Wires (male to male and male to female)
9V Battery (i use 10* 1.2V lipo battery)
Drunk Wheel

Step 2: SCHEMA

Step 3: CODE

The code has explanations of code functions. You will easly understand it. If you have a problem , you can contact me.

//satdeliaslan.wordpress.com//
const int in1 = 9;      //BACK RIGHT
const int in2 = 8;      //FORWARD RIGHT  
const int in3 =  10;    //FORWARD LEFT
const int in4 =  11;    //BACK LEFT
const int enA = 5;      //left motor speed
const int enB = 6;      //right motor speed
  //!enable pins have to connect with arduino's PWM pins!
int yavas=200;          //decrease the speed(you can just chance here ,not every code); 
void setup() {
  pinMode(in1, OUTPUT); //all motor pins are output
  pinMode(in2, OUTPUT);  
  pinMode(in3, OUTPUT);
  pinMode(in4, OUTPUT);
  pinMode(enA, OUTPUT);
  pinMode(enB, OUTPUT);
  Serial.begin(9600);    //for serial communication
}
void loop() {
  if(Serial.available()>0){     //if we communicate with hc 05 
   char durum = Serial.read();  //get the input 
}
   //FORWARD
    if(durum=='w'){               //if we get 'w' 
    analogWrite(enA,  255);       //set left the speed(0 to 255)
    digitalWrite(in1, LOW);       
    digitalWrite(in2,HIGH);
    analogWrite(enB,  255);  
    digitalWrite(in3,HIGH);
    digitalWrite(in4, LOW);
}
    //TURN RIGHT
   if(durum=='d'){
    analogWrite(enA,  255);       
    digitalWrite(in1, LOW);
    digitalWrite(in2,HIGH);
    analogWrite(enB,  255);  
    digitalWrite(in3, LOW);
    digitalWrite(in4,HIGH);
}
    //TURN LEFT
    if(durum=='a'){
    analogWrite(enA,  255);  
    digitalWrite(in1,HIGH);
    digitalWrite(in2, LOW);
    analogWrite(enB,  255);  
    digitalWrite(in3,HIGH);
    digitalWrite(in4, LOW);
}
    //BACKWARD
    if(durum=='s'){
     analogWrite(enA,  255);  
    digitalWrite(in1, HIGH);
    digitalWrite(in2,  LOW);
    analogWrite(enB,  255);  
    digitalWrite(in3, LOW);
    digitalWrite(in4,HIGH);
    
}
  //FORWARD SLOWLY
    if(durum=='k'){
    analogWrite(enA, yavas);  
    digitalWrite(in1, LOW);
    digitalWrite(in2,HIGH);
    analogWrite(enB,  yavas);  
    digitalWrite(in3,HIGH);
    digitalWrite(in4, LOW);
}
    //TURN RIGHT SLOWLY
   if(durum=='l'){
    analogWrite(enA, yavas);  
    digitalWrite(in1, LOW);
    digitalWrite(in2,HIGH);
    analogWrite(enB, yavas);  
    digitalWrite(in3, LOW);
    digitalWrite(in4,HIGH);
}
    //TURN LEFT SLOWLY
    if(durum=='m'){
    analogWrite(enA,  yavas);  
    digitalWrite(in1,HIGH);
    digitalWrite(in2, LOW);
    analogWrite(enB,  yavas);  
    digitalWrite(in3,HIGH);
    digitalWrite(in4, LOW);
}
    //BACKWARD SLOWLY
    if(durum=='n'){
     analogWrite(enA,  yavas);  
    digitalWrite(in1, HIGH);
    digitalWrite(in2,  LOW);
    analogWrite(enB,  yavas);  
    digitalWrite(in3, LOW);
    digitalWrite(in4,HIGH);
    
}
    //STOP THE CAR
   if(durum=='z'){              
    digitalWrite(in1, HIGH);    //if we make HIGH every pin it will stop
    digitalWrite(in2, HIGH);    //or you can do :
    digitalWrite(in3, HIGH);    //analogWrite(enA,0);
    digitalWrite(in4, HIGH);    //analogWrite(enB,0);
}
  }