Overview
Things
Story

1. Introduction
2. Demonstration
3. Circuit connections
4. Precautions

Published December 29, 2020

Hand follower

Make a robot that follows your hand movement.

IntermediateProtip1 hour711

Things used in this project

Hardware components

Arduino UNO

L293D motor shield

Proximity Sensor

DC Motor, 12 V

Li-Ion Battery 1000mAh

Robot car chasis

Jumper wires (generic)

Software apps and online services

Arduino IDE

Story

1. Introduction

This is a project in which a hand following robot is made using Arduino Uno along with its L293D motor shield. It's a simple and interesting project.

2. Demonstration

3. Circuit connections

>>Connect the shield on the Arduino Uno board.

>>Connect the battery to the battery i/o terminals on the shield.

>> Connect the left-hand side motor to the M1 terminal of the shield and the right-hand side motor to the M4 terminal of the shield.

>>Connect the three IR sensors to the A0, A1 snd A2 pins on the shield. Also, connect the Vcc and GND pins to 5V and ground pins on the shield respectively.

>>Use a 2/4 wheel robocar chassis to assemble the above.

4. Precautions

(a) Remove the jumper from the switch while uploading the code in Arduino.

(b) Remove the dc motors from the shield while uploading the code.

Code

Arduino code

#include<AFMotor.h>
AF_DCMotor m1(1);
AF_DCMotor m2(4);
void turnLeft()
{
  m1.setSpeed(0);
  m2.setSpeed(153);
  m1.run(RELEASE);
  m2.run(FORWARD);
}
void turnRight()
{
  m1.setSpeed(153);
  m2.setSpeed(0);
  m2.run(RELEASE);
  m1.run(FORWARD);
}
void Forward()
{
  m1.setSpeed(153);
  m2.setSpeed(153);
  m1.run(FORWARD);
  m2.run(FORWARD);
}
void Stop()
{
  m1.setSpeed(0);
  m2.setSpeed(0);
  m1.run(RELEASE);
  m2.run(RELEASE);
}
void setup()
{
  pinMode(A0,INPUT);
  pinMode(A1,INPUT);
  pinMode(A2,INPUT);
}
void loop()
{
  int left,right,center;
  left=analogRead(A0);
  center=analogRead(A1);
  right=analogRead(A2);
  if (left<900 && (center==0 || center>0) && right>900)
    turnLeft();
  else if(left>900 && center>0 && right>900)
    Forward();
  else if(left>900 && (center==0|| center>0) && right<900)
    turnRight();
  else
    Stop();
}

Credits

Adhyoksh Jyoti

11 projects • 9 followers

Electronics and Communication Engineering B.Tech graduate from NIT Srinagar, J&K.

Contact

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Hand follower

Hand follower

Things used in this project

Hardware components

Software apps and online services

Story

1. Introduction

2. Demonstration

3. Circuit connections

4. Precautions

Schematics

Circuit

Code

Arduino code

Credits

Adhyoksh Jyoti

Comments

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