How to make Obstacle Avoiding Robot using Arduino !!

In this video I have shown how to build an obstacle avoiding robot using Arduino Uno microcontroller. If an object comes ahead of it the robot stops, move back a little bit, look left/right and then it turns that side which has greater distance.

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Components required

Video gear

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#diyprojects #robot #electronic #smartcars

[prateekverma]

//Code

#include <AFMotor.h> // libraray for motor shield
#include <Servo.h> // libraray for servo motor
#include <NewPing.h> // libraray for ultrasonic sensor

const int Trig_Pin =A0;
const int Echo_Pin =A1;
const int Max_Speed =200;
const int Max_Dist = 250;

NewPing ultra_sonic(Trig_Pin, Echo_Pin, Max_Dist);

AF_DCMotor motor1(1, MOTOR12_1KHZ);
AF_DCMotor motor2(2, MOTOR12_1KHZ);
AF_DCMotor motor3(3, MOTOR34_1KHZ);
AF_DCMotor motor4(4, MOTOR34_1KHZ);

Servo myservo;

int distance=250;
int speedSet=0;
boolean goesForward=false;

void setup() {

myservo.attach(10);
myservo.write(0);
delay(2000);
distance=readDistance();
delay(100);
moveForward();
}

void loop() {
int dist_R = 0;
int dist_L = 0;
delay(100);

if(distance<=25){
moveStop();
delay(100);

moveBackward();
delay(200);

moveStop();
delay(100);

dist_R = right_Distance();
delay(100);
dist_L = left_Distance();
delay(100);

if(dist_R <= dist_L){
turnLeft();
moveStop();
}
else{
turnRight();
moveStop();
}
}
else{
moveForward();
}
distance = readDistance();

}

int left_Distance(){
myservo.write(170);
delay(500);
int dist = readDistance();
delay(100);
myservo.write(90);
return dist;
delay(100);
}

int right_Distance(){
myservo.write(10);
delay(500);
int dist = readDistance();
delay(100);
myservo.write(90);
return dist;
delay(100);
}

int readDistance(){
int cm = ultra_sonic.ping_cm();
if(cm<=0){ // this is done in case when sensor gives -ve value which is absurd
cm=250;
}
return cm;
}

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

void moveForward() {

if(!goesForward)
{
goesForward=true;
motor1.run(FORWARD);
motor2.run(FORWARD);
motor3.run(FORWARD);
motor4.run(FORWARD);
for (speedSet = 0; speedSet < Max_Speed; speedSet +=2) // slowly bring the speed up to avoid loading down the batteries too quickly
{
motor1.setSpeed(speedSet);
motor2.setSpeed(speedSet);
motor3.setSpeed(speedSet);
motor4.setSpeed(speedSet);
delay(5);
}
}
}
void moveBackward() {
goesForward=false;
motor1.run(BACKWARD);
motor2.run(BACKWARD);
motor3.run(BACKWARD);
motor4.run(BACKWARD);
for (speedSet = 0; speedSet < Max_Speed; speedSet +=2) // slowly bring the speed up to avoid loading down the batteries too quickly
{
motor1.setSpeed(speedSet);
motor2.setSpeed(speedSet);
motor3.setSpeed(speedSet);
motor4.setSpeed(speedSet);
delay(5);
}
}

void turnRight() {
motor1.run(FORWARD);
motor2.run(FORWARD);
motor3.run(BACKWARD);
motor4.run(BACKWARD);
delay(500);
motor1.run(FORWARD);
motor2.run(FORWARD);
motor3.run(FORWARD);
motor4.run(FORWARD);
}

void turnLeft() {
motor1.run(BACKWARD);
motor2.run(BACKWARD);
motor3.run(FORWARD);
motor4.run(FORWARD);
delay(500);
motor1.run(FORWARD);
motor2.run(FORWARD);
motor3.run(FORWARD);
motor4.run(FORWARD);
}

[AlejandroTortolini]

Excelent video, thanks for sharing it!!

[rameshkarthikeyan]

Great work, Can you share an online link to buy all the components? Thanks, COuld not find a few of the exact items.

[sudheeshbehl]

Bro I am noob no knowledge of this first project u see your video only pls tell what are libraries that you included in //code pls tell do we have to write them or just write after libraries section

[kartikeysingh]

Literally saved my degree bro thanks a lot

[VikashJatav-frnb]

M apka Ahsan Kabhi nhi bhulunga please sir 🙏🙏

[LaribiRayen]

I want to use a H bridge instead of the arduino shield and an esp32 instead of using arduino. Will the code be the same after i changes the libraries?

[christiangeraghty]

what is the sticky stuff called you use to keep your micro servo and sensor in place?

[usmanbello]

Can I purchase the whole implementation from you ?

[kunalkalaskar]

Can we use 9v battery ... please reply

[amansayyed]

while coding the battery is connected or not ?

[SillySquadron-sk]

how to add extra male pin in motor shield

[aashututorial]

Why our motor driver got sparked when we connect to 7 volt bettery plzzz help

[mikestrivia]

This is good, but you could have made this much better if you had shown each detail and connection. A little more time would have made this go from watching someone throw parts together to a follow each step with me and learn how and why I'm doing this. And lower the awful background music.

[RAVEGAMESTUDIO]

Somehow the code doesn't work properly, there is always an AFmotor error message

[tinsuneg]

My son did this for school project and the sensor is not working . Please help. Thank you.

[bilalpatel]

i am making this project but servo motor us not working and all four motor are rotating for only one second it get stop.What should i do

[anandaseal]

There are showing an error " AFMotor such file or directory not found

[knightk]

Hi bro

Everything is fine I'm using 2 ×3.7 v cells but sensor is working but motor is not working please help

[AmitKumar-olky]

Awesome project... What's the budget?