DIY HOW TO MAKE a OBSTACLE AVOIDER ROBOT ( AND CODE)

the obstacle avoider robot avoid s all the obtscale before it and can move forward

Step 1: GET THE COMPONENTS

THINGS REQUIRED

ULTRA SONIC SENSOR http://amzn.to/2ETX4ix

SERVO MOTOR http://amzn.to/2H3gVfM

CHASIS http://amzn.to/2jCWoEL

WHEELS http://amzn.to/2B4EN2w

ARDUINO UNO/NANO http://amzn.to/2B6UKoM

BREAD BOARD http://amzn.to/2yachqQ

4V LEAD ACID BATTERY *3 http://amzn.to/2kdY0EF

L298N MOTOR DRIVER http://amzn.to/2kgh3xN

CONNECTING WIRES http://amzn.to/2B3nejk

Step 2: MAKE THE CONNECTIONS

CONNECT THE MOTORS ,CASTOR WHEELS , MOTORS AND ARDUINO BOARD TO THE CHASSIS

FOLLOW MY YOUTUBE VIDEO TO MAKE PERFECT CONNECTIONS

Step 3: ASSEMBLE ALL THE PARTS

connect the wiring to the motor driver and arduino and connect the battery to the shield

Step 4: GET THE CODE

#include //Servo motor library. This is standard library

#include //Ultrasonic sensor function library. You must install this library

//our L298N control pins const int LeftMotorForward = 7; const int LeftMotorBackward = 6; const int RightMotorForward = 4; const int RightMotorBackward = 5;

//sensor pins #define trig_pin A1 //analog input 1 #define echo_pin A2 //analog input 2

#define maximum_distance 200 boolean goesForward = false; int distance = 100;

NewPing sonar(trig_pin, echo_pin, maximum_distance); //sensor function Servo servo_motor; //our servo name

void setup(){

pinMode(RightMotorForward, OUTPUT); pinMode(LeftMotorForward, OUTPUT); pinMode(LeftMotorBackward, OUTPUT); pinMode(RightMotorBackward, OUTPUT); servo_motor.attach(10); //our servo pin

servo_motor.write(115); delay(2000); distance = readPing(); delay(100); distance = readPing(); delay(100); distance = readPing(); delay(100); distance = readPing(); delay(100); }

void loop(){

int distanceRight = 0; int distanceLeft = 0; delay(50);

if (distance <= 20){ moveStop(); delay(300); moveBackward(); delay(400); moveStop(); delay(300); distanceRight = lookRight(); delay(300); distanceLeft = lookLeft(); delay(300);

if (distance >= distanceLeft){ turnRight(); moveStop(); } else{ turnLeft(); moveStop(); } } else{ moveForward(); } distance = readPing(); }

int lookRight(){ servo_motor.write(50); delay(500); int distance = readPing(); delay(100); servo_motor.write(115); return distance; }

int lookLeft(){ servo_motor.write(170); delay(500); int distance = readPing(); delay(100); servo_motor.write(115); return distance; delay(100); }

int readPing(){ delay(70); int cm = sonar.ping_cm(); if (cm==0){ cm=250; } return cm; }

void moveStop(){ digitalWrite(RightMotorForward, LOW); digitalWrite(LeftMotorForward, LOW); digitalWrite(RightMotorBackward, LOW); digitalWrite(LeftMotorBackward, LOW); }

void moveForward(){

if(!goesForward){

goesForward=true; digitalWrite(LeftMotorForward, HIGH); digitalWrite(RightMotorForward, HIGH); digitalWrite(LeftMotorBackward, LOW); digitalWrite(RightMotorBackward, LOW); } }

void moveBackward(){

goesForward=false;

digitalWrite(LeftMotorBackward, HIGH); digitalWrite(RightMotorBackward, HIGH); digitalWrite(LeftMotorForward, LOW); digitalWrite(RightMotorForward, LOW); }

void turnRight(){

digitalWrite(LeftMotorForward, HIGH); digitalWrite(RightMotorBackward, HIGH); digitalWrite(LeftMotorBackward, LOW); digitalWrite(RightMotorForward, LOW); delay(500); digitalWrite(LeftMotorForward, HIGH); digitalWrite(RightMotorForward, HIGH); digitalWrite(LeftMotorBackward, LOW); digitalWrite(RightMotorBackward, LOW); }

void turnLeft(){

digitalWrite(LeftMotorBackward, HIGH); digitalWrite(RightMotorForward, HIGH); digitalWrite(LeftMotorForward, LOW); digitalWrite(RightMotorBackward, LOW);

delay(500); digitalWrite(LeftMotorForward, HIGH); digitalWrite(RightMotorForward, HIGH); digitalWrite(LeftMotorBackward, LOW); digitalWrite(RightMotorBackward, LOW); }