In robotics , obstacle avoidance is the task of satisfying some control objective subject to non- intersection or non-collision position constraints . It has a sonar sensor which are used to sense the obstacles coming in between the path of robot . It will move into the best direction and avoid the obstacle which is coming in its path. By adding sensor in this robot one can simply collect data from the environment .

It can perform more precisely than many robots even in a small place .

Step 1: Know How This Thing Works

You can see the most updated informations from my github repository.

Step 2: Gather Things :

An arduino uno or any arduino (I have used arduino uno)

A sonar sensor (HC-SR 04)

A few jumper wires

2 resistor (220 ohms)

L298 dual motor control driver

A battery

A chassis (Normally includes other needed components )

2 gear motors

Step 3: Connect All Parts :

Sonar connections :

Vcc – 5 Volt

GND – GND

Trig – Arduino 4

Echo – Arduino 5

Motor driver :

EnB – 220 ohms resistor - 5 Volt (Motor Driver – to control speed) (EnB to enable through a 220 ohms resistor)

EnA – 220 ohms resistor - 5 Volt (Motor Driver – to control speed) (EnA to enable through a 220 ohms resistor)

IN1 – Arduino 9

IN2 – Arduino 8

IN3 – Arduino 7

IN4 – Arduino 6

GND – Arduino GND

Vcc – Arduino Vin

Now connect motors with driver via Motor-A and Motor-B port .

Step 4: Upload Code :

Lets upload the code into the heart . It’s the beauty

of the robot . If you want you can modify pins or code . Such as – modifying speed , minimum distance from object , duration of running in any direction. Useful comments are given in the code to understand more easily .

(No extra driver or header file needed)

I have uploaded the file , you also can get the code here (to see more updates)