Overview
Things
Story

Steps to make this project

Published August 3, 2023 © GPL3+

Can you make Human Following Robot ?

Human Following Bot

IntermediateFull instructions provided1 hour304

Things used in this project

Hardware components

Arduino UNO

l293d motor shield

SG90 Micro-servo motor

SparkFun Ultrasonic Sensor - HC-SR04

DC Motor, 12 V

wheels

Metal Enclosure, Chassis

Battery Holder, 18650 x 2

battery 18650

Slide Switch

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

Hot glue gun (generic)

Story

You want help in making this Project ??

Watch the video

I made a new project named Human Following Bot.

If you want to simulate this Human Following Robot on Proteus then watch this video : https://youtu.be/AfrxI4tO7p0

watch the whole video to make this project at home.

It used 2 IR sensors and an ultrasonic sensor. IR sensors used to follow the human or object and ultrasonic sensor is used to move back the robot.

If you like this project respect it.

Give me suggestions so I can improve it or any feedback you want to give to my YouTube channel.

link is : $ https://studio.youtube.com/channel/UCaXI2PcsTlH5g0et67kdD6g $

Also you can give me suggestions on "What I made next project.?"

Steps to make this project:

1. Gather components like Arduino, Dc geared motors with wheels, 2 IR sensors, ultrasonic sensor, servo motor, cardboard, l293d motor driver shield, battery 9 v, switch, Jumper wires etc.

2. Take cardboard and place all 4 motors with wheels on it to make a car.

3. Place IR sensors on the car.

4. Stick servo motor on the car.

5. Place ultrasonic sensor in box and add handle to it after that connect it on servo motor.

6. Connect arduino and l293d motor shield on car.

7. Do connections as shown in circuit diagram.

8. Upload the code and connect switch with battery to l293d motor driver shield.

Adjust the sensitivity of IR sensors.

Your project is ready...!!!

Visit my YouTube channel once and see more interesting projects.

"Electronics is Fun"

Code

Arduino Code

// https://www.youtube.com/channel/UCaXI2PcsTlH5g0et67kdD6g  //
// Human Following Robot  //
// By MOHD SOHAIL //

#include<Servo.h>
#include<AFMotor.h>
#define   LEFT A0
#define echopin A1 // echo pin
#define trigpin A2 // Trigger pin
#define   RIGHT A3

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 pos =0;
long time;

void setup(){

Serial.begin(9600);
myservo.attach(10);

for(pos   = 90; pos <= 180; pos += 1){
myservo.write(pos);
delay(15);
}
 
for(pos   = 180; pos >= 0; pos-= 1) {
myservo.write(pos);
delay(15);
}

for(pos   = 0; pos<=90; pos += 1) {
myservo.write(pos);
delay(15);
}

pinMode(RIGHT,   INPUT);
pinMode(LEFT, INPUT);

pinMode(trigpin, OUTPUT);
pinMode(echopin,   INPUT);

}

void loop(){
unsigned int distance = read_cm();

int   Right_Value = digitalRead(RIGHT);
int Left_Value  = digitalRead(LEFT);

Serial.print("R=   ");
Serial.print(Right_Value);
Serial.print(" L= ");
Serial.print(Left_Value);
Serial.print("   D= ");
Serial.println(distance);

     if((Right_Value==1) && (distance>=10   && distance<=30)&&(Left_Value==1)){forword();}
else if((Right_Value==0) && (Left_Value==1)){turnRight();}
else   if((Right_Value==1) && (Left_Value==0)){turnLeft();}
else if((Right_Value==1)   && (Left_Value==1)){stop();}
else if(distance > 5 && distance < 10){stop();}
else   if(distance < 5){backword();}

delay(50);
}

long read_cm(){
   digitalWrite(trigpin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigpin,   HIGH);
  delayMicroseconds(10);
  time = pulseIn (echopin, HIGH);
  return   time / 29 / 2;
}

void forword(){// turn it on going forward
Motor1.setSpeed(120);
Motor1.run(FORWARD);
Motor2.setSpeed(120);
Motor2.run(FORWARD);
Motor3.setSpeed(120);
Motor3.run(FORWARD);
Motor4.setSpeed(120);
Motor4.run(FORWARD);
}

void   backword(){ // the other way
Motor1.setSpeed(120);
Motor1.run(BACKWARD); 
Motor2.setSpeed(120);
Motor2.run(BACKWARD);
Motor3.setSpeed(120);
Motor3.run(BACKWARD);   
Motor4.setSpeed(120);
Motor4.run(BACKWARD); 
}

void turnRight(){   // the other right
Motor1.setSpeed(200);
Motor1.run(FORWARD);
Motor2.setSpeed(200);
Motor2.run(FORWARD);
Motor3.setSpeed(100);
Motor3.run(BACKWARD);
Motor4.setSpeed(100);
Motor4.run(BACKWARD);
}

void   turnLeft(){ // turn it on going left
Motor1.setSpeed(100);
Motor1.run(BACKWARD);
Motor2.setSpeed(100);
Motor2.run(BACKWARD);
Motor3.setSpeed(200);
Motor3.run(FORWARD);
Motor4.setSpeed(200);
Motor4.run(FORWARD);
}

void   stop(){ // stopped
Motor1.setSpeed(0);  
Motor1.run(RELEASE);
Motor2.setSpeed(0);
Motor2.run(RELEASE);
Motor3.setSpeed(0);
Motor3.run(RELEASE);
Motor4.setSpeed(0);
Motor4.run(RELEASE);   
}