Hardware Required

Introduction

In this project, we have used this module for movement of certain parts or robotic components.

HARDWARE REQUIRED

Name: Move Robotic Head using Obstacle avoiding Module
Brand: Robokreeda
SKU: 2883
Price: 1532.82 INR
Availability: InStock
Rating: 5 (1 reviews)

SOFTWARE REQUIRED

Arduino IDE 1.8.5 (programmable platform for Arduino)

Click To Download: https://www.arduino.cc/en/Main/Software

SPECIFICATIONS

Avoidance Sensor Module

The IR Obstacle Avoidance Sensor works by sending infrared light when the infrared light is reflected and received by the receiver your autonomous vehicle will stop. The sensor has a potentiometer which can be adjusted to change the detection distance.

Length: 45mm
Width: 15mm
Height: 10mm
Operating Voltage: 5v DC

SG-90 Servo Motor

Connector	JR and FP connector
Cable Length	25 cm
Operating System	NO load ; : 0.12 sec / 60 degree (4.8V), 0.10 sec / 60 degree (6.0V)
Stall Torque (4.8 V)	1.6kg/cm
Temperature	-30~60’C
Dead band width	5 us
Working Voltage	3.5~6V
Dimension	1.26 in x 1.18 in x 0.47 in (3.2 cm x 3 cm x 1.2 cm)
Weight	4.73 oz (134 g)
Motor Type	3 pole

CIRCUIT CONNECTION

Connect GND of Arduino Uno with Breadboard for further GND connections.
Connect Pin 5V of Arduino Uno with Breadboard for further 5V power supply connections.
Connect VCC of Servo motor with 5V rail of Breadboard.
Connect GND of Servo Motor with GND rail of Breadboard.
Connect Pin Signal of Servo Motor with Digital Pin 9 of Arduino.
Connect VCC of both Obstacle avoidance Module with 5V rail of Breadboard.
Connect GND of both Obstacle avoidance Module with GND rail of Breadboard.
Connect Pin Signal of Obstacle avoidance Module 1 with Digital Pin 7 of Arduino Uno.
Connect Pin Signal of Obstacle avoidance Module 2 with Digital Pin 8 of Arduino Uno.

NOTE: Please adjust the sensitivity by the potentiometer over the module so that it can show a better result.

CODE

Click to download the code: https://drive.google.com/open?id=1Gv4l6H76nWt07tUEJO_E0J181nh1r2rO

#include <Servo.h>

int obstaclePin = 7; // This is our input pin

int obstaclePin2 = 8;

int hasObstacle = HIGH; // HIGH MEANS NO OBSTACLE

int hasObstacle2 = HIGH;

Servo myservo;

/* The setup() function is called when a sketch starts. It is used to initialize variables, pin modes, start using libraries, etc. This function will only run once, after each power up or reset of the Arduino board. */

void setup()

{

myservo.attach(9);

pinMode(obstaclePin, INPUT);

pinMode(obstaclePin2, INPUT);

Serial.begin(9600);

}

/* The loop() function executes the program repeatedly until Specified. */

void loop()

{

hasObstacle = digitalRead(obstaclePin); //Reads the output of the obstacle sensor from the 7th PIN of the Digital section of the arduino

hasObstacle2 = digitalRead(obstaclePin2);

if (hasObstacle == LOW && hasObstacle2 == LOW) //LOW means something is ahead, so illuminates the 13th Port connected LED

{

Serial.println(“condition first”);

myservo.write(90);

}

else if (hasObstacle == LOW && hasObstacle2 == HIGH)

{

Serial.println(“condition second”);

myservo.write(45);

}

else if (hasObstacle == HIGH && hasObstacle2 == LOW)

{

Serial.println(“condition thaerd”);

myservo.write(135);

}

delay(200);

}

WORKING

Welcome to the Arduino Based project which consists of Servo Motor and Obstacle Avoidance Module. The basic working principle of Obstacle avoidance module is being described here. This Infrared Obstacle Avoidance Sensor returns a signal when it detects an object in range. The range of the sensor is around 2-40 cm is distance. It operates at 3.5 to 5V around 20 milliamps. Infrared obstacle avoidance sensor is designed to detect obstacles or the difference in reflective services. One application is to help a wheeled robot avoid obstacles with a sensor to react to adjustable distance settings. This device has an infrared transmitter and receiver that forms the sensor pair. The transmitter LED emits a certain frequency of infrared, which the receiver LED will detect. The receiving LED will detect some of the signal back and will trigger the digital on/off “signal” pin when a specific threshold “distance” has been detected. This way we can also control the movement of various robotic parts attached with the circuit.

Most boards will have 2 potentiometers, one of which is to adjust how sensitive the sensor is. You can use it to adjust the distance from the object at which the sensor detects it. Typically, the other potentiometer, which changes the transmitter IR frequency is not adjusted.