Published March 28, 2020 © GPL3+

Obstacle avoiding car using l293d motor driver shield

This project is a easy one just to make a car which can avoid forward objects.

BeginnerProtip9,991

Obstacle avoiding car using l293d motor driver shield

Things used in this project

Hardware components

Arduino UNO

L293D motor driver shield

Ultrasonic Sensor - HC-SR04 (Generic)

5v dc motors

car chasis

Jumper wires (generic)

3.7 v li-ion battery

9V battery (generic)

9V Battery Clip

Slide Switch

wheels

Software apps and online services

Arduino IDE

Story

This project is about a car that can avoid its forward objects. Basically its my first project uploading. I started using arduino from December, 2019 and then I came in contact with the l293d motor driver shield. primarily, I was not able to make this. But thanks to the arduino society, for their help

::::::::::::::::::::::::::::::::::::::::::::::::::BASIC INSTRUCTIONS:::::::::::::::::::::::::::::::::::::::::::::::::

1.Please connect the leftside motors accordingly on M3 and M4. and rightside motors on M1 and M2.

2. Use 3.7v li-ion batteries(use a switch to control it). Here 9v batteries are not so efficient(cause I used them previously and the motors barely move).

3.connect the trigpin and echopin of ultrasonic sensor accordingly to the A0 and A2 pin on motor driver shield.

4. Place the ultrasonic sensor frontside of your structure. You can change the code as you please.

HAPPYCODINGANDBESTOFLUCK.

''''Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious.''''

Stephen Hawking

Code

obstacle avoiding car

#include <AFMotor.h>

const int trigPin = A0;
const int echoPin = A2;
long duration;
int distance;

AF_DCMotor motor1(1, MOTOR12_1KHZ);
AF_DCMotor motor2(2, MOTOR12_1KHZ);
AF_DCMotor motor3(3, MOTOR12_1KHZ);
AF_DCMotor motor4(4, MOTOR12_1KHZ);

 

void setup() {
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT);

  Serial.begin(9600);
  
  motor1.setSpeed(250);
  motor2.setSpeed(250);
  motor3.setSpeed(250);
  motor4.setSpeed(250);
 
}

void loop() 
{
  
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance= duration*0.034/2;
Serial.print("Distance: ");
Serial.println(distance);

movestop();
delay(1000);

if(distance < 75)
{   
 
 backward();
    delay(1000);
  
     
    movestop();
    delay(1000);
    
    lookright();
    delay(750);
}
else
{
 forward();
  delay(1000); 

}


}


void movestop()
{
  motor1.run(RELEASE);
  motor2.run(RELEASE);
  motor3.run(RELEASE);
  motor4.run(RELEASE);
}

void forward()
{
  motor1.run(FORWARD);
  motor2.run(FORWARD);
  motor3.run(FORWARD);
  motor4.run(FORWARD);
  motor1.setSpeed(200);
  motor2.setSpeed(200);
  motor3.setSpeed(200);
  motor4.setSpeed(200);
 
}

void backward()
{
  motor1.run(BACKWARD);
  motor2.run(BACKWARD);
  motor3.run(BACKWARD);
  motor4.run(BACKWARD);
  motor1.setSpeed(200);
  motor2.setSpeed(200);
  motor3.setSpeed(200);
  motor4.setSpeed(200);
 
}
    
void  lookright()
{
  motor1.run(FORWARD);
  motor2.run(FORWARD);
  motor3.run(BACKWARD);
  motor4.run(BACKWARD);
  motor1.setSpeed(200);
  motor2.setSpeed(200);
  motor3.setSpeed(200);
  motor4.setSpeed(200);
 
}

void lookleft()
{
  motor1.run(BACKWARD);
  motor2.run(BACKWARD);
  motor3.run(FORWARD);
  motor4.run(FORWARD);
  motor1.setSpeed(200);
  motor2.setSpeed(200);
  motor3.setSpeed(200);
  motor4.setSpeed(200);
 
}

Credits

Pritom9900

1 project • 0 followers