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

5. 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

6. 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 (+)

7. 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.

8. Attach the wheels