Basic Overview of The Arduino Based Homemade Robotics project "Homey The Robot".

Now-a-days robots are playing a very important role in the industry level and also out of the industry. Dependency on robots are increasing for their fast and reliable working speed and accuracy. Considering that demand of the robot increasing every day.
Homey Robot
This research was conducted focusing on the necessity of robots in our daily life. This video documentation shows the system where a robot can be controlled in different ways like voice, wireless and full automatic mode. The prototype was built and tested. The robot prototype will be able to receive voice command from short distance. In case of long distance communication user will be able to connect through internet using Internet of Things (IoT).

The used hardware's are:

  • Arduino Mega 2560
  • Arduino Nano
  • Voice Reorganization Module (V-3)
  • HC-05 Bluetooth Serial Communication Module
  • LM35 Temperature Sensor
  • LCD DISPLAY (16 X 2)
  • Ultrasonic Sensor
  • Servo motor
  • Power Supply 12v lipo
  • Jumper wire
  • L293D Motor Driver
  • Plastic board for body structure etc.

System development
The Homey robot was built based on Arduino Open Source Platform. The robot connects itself with android phone through HC-05 Bluetooth Serial Communication Module. The user can give command using android application. The system can send command and also receive data from the robot. User can observe sensor value from the robot.
Another way of giving instruction is voice command. Voice Recognition module (VR-3) was used to receive voice command along with Arduino Nano. Arduino Nano receive voice command and process it. Then it generates specific instruction for each voice command and send it to Arduino mega through TX RX serial communication pins. Then Arduino mega perform according to the command. Voice training sets are stored in Arduino Nano. Therefor when it receives voice command it process and compare the voice with training data-set.

Voice Input and Output
Voice commands are stored in two different groups and each group have their unique voice commands. The voice recognition module takes input command as group. Each group can hold 6 commands. Maximum 255 commands can be trained with the voice recognition module.
The commands for both groups are given below:

Table 1 Voice Input and Output in Group 1
Voice Command (Input)
Arduino Command
Work (Output)
Move Forward
Move Backward
Move Left
Move Right
Table 2 Voice Input and Output in Group 2
Voice Command (Input)
Arduino Command
Work (Output)
Light on
Light on
Light off
Night mode
Night mode
IoT Input and Output
A web application and an android application was developed to control the robot remotely through internet. The android application interface is given below:

Android application
The robot can be controlled by android application.
While user press any button on the application, corresponding commands are sent via internet to the robot. The commands are in the form of ASCII character. The Arduino on the robot then compare the received command with its pre-defined commands and control the servo motors, gear motors, sensors and other peripherals to move forward, backward, left, right, stop, move hands, fingers or measuring sensor values.
The temperature button send command to Arduino to check temperature sensor value and the value is sent back to the user. Temperature value also displayed on the liquid crystal display attached on the front side of the robot. If the user presses the auto button or gets disconnected from internet the robot can move anonymously. During the anonymous mode sonar sensor helps it to avoid obstacle.
The sonar sensor HC-05 helps to measure distance of the obstacle in front of the robot.  The sonar sensor generates ultrasonic sound using trigger. Then it reads the echo Pin, returns the sound wave travel time in microseconds. The distance is calculated using the following rule:
Duration = Distance / Speed
       Distance = duration*0.034 / 2  
The speed of sound in air is 0.034 and it travel twice to return, so divided by 2.
The Arduino Mega micro controller get the distance value and check the condition when it should stop and search for another long-distance path.
Motor driver l329d [8] was used to control motors speed. There are two gear motor attached in the lags of the robot. The motors are connected with motor driver so that speed can be controlled by the micro controller. There are four digital input for two motors in motor driver. The diagram of motor driver makes it clear:
Motor Driver L329D
The robot was built as the shape of human. Different body parts like hand, head, and fingers are controlled by servo motors. It also can handshake with human using its robotic arms and pick objects. As the structure is not that much strong, therefore at present it only can pick lightweight objects.

Homey Robot Robotics Hand

The Video Documentation of the project given bellow:

If you like the Project, Please share, Subscribe to the YouTube Channel.

MARI themes

Powered by Blogger.