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Path Finder

An Arduino based robot that follows a path, identifies obstacles and changes its direction accordingly.

The algorithm used is the one that first detects the obstacle, and if any obstacle found, the robot will find a better alternative and change it's path.

Team Members:

  1. Karuna Varshney
  2. Nitish Chauhan
  3. Rohit Motwani
  4. Saurabh Sagar

Hardware Used:

  • Arduino Uno Board
  • Motor Shield L293D
  • Ultrasonic Sensor
  • Mini Servo Motor
  • DC Motor and Wheel x4
  • Chassis 4WD
  • Bracket for HC-SR04
  • Battery 9V x2
  • Battery Buckle x2
  • Wires
  • Button
  • Glue Gun

Software Used:

  • Arduino Software(IDE).
  • Library for motor driver module (Adafruit AF_Motor Arduino library).
  • The NewPing Arduino Library.
  • Adobe Photoshop.
  • A Windows OS – Windows 7 or above or A Mac OSX - 10.11 or above.

Connections:

C) Connections :

  1. DC Motors connect to the Motor Shield
  2. Left Motors connect to M1 and M2 (If the motors run backwards, change the (+) and (-) connections)
  3. Right Motors connect to M4 and M3
  4. The Servo motor connect to the Motor Shield
  • The Servo1 input is connected to the Arduino Digital10 input
  • The Servo2 input is connected to the Arduino Digital9 input
  1. The HC-SR04 Sensor connections
  • The HC-SR04 Sensor VCC connect to the Arduino +5V
  • The HC-SR04 Sensor GND connect to the Arduino Ground
  • The HC-SR04 Sensor Trig connect to the Arduino Analog 0
  • The HC-SR04 Sensor Echo connect to the Arduino Analog 1
  1. Battery and on / off button connection
  • The (+) from the battery is connect to a leg of the button
  • Connect a cable to the other legs of the button. This cable is for Motor Shield (+)
  1. 2 seperate DC power supplies for the Arduino and motors
  • If you would like to have 2 seperate DC power supplies for the Arduino and motors. Plug in the supply for the Arduino into the DC jack, and connect the motor supply to the PWR_EXT block. Make sure the jumper is removed from the motor shield.
  1. Attach the wheels