KABANDHA is a microcontroller-powered pet demon robot inspired by the mythical figure from the Ramayana. It is designed to be interactive, featuring moveable arms, Bluetooth connectivity, and customizable behavior. This project combines fun mythology with practical robotics, using two Arduino Nano microcontrollers to control motion, communication, and display.
- Moveable arms controlled by servo motors
- Bluetooth connectivity using the HC-05 module
- OLED Display for status updates or visual effects
- Four-wheel drive powered by N20 motors for mobility
- 2 x Arduino Nano
- DRV8833 Motor Driver
- HC-05 Bluetooth Module
- OLED Display
- 7.4V LiPo Battery
- 4 x N20 Motors
- N20 Motor Wheels
- Servo Motor
- Male & Female Header Pins
- Breadboard
- Connecting Wires
- 5mm Sunboard (for chassis)
- Thick Sheet (for canopy)
- Tiny screws
- Soldering Iron and Solder Paste
- Hot Glue Gun
- Super Glue
- Cutting Hobby Knife
- Screwdriver
- Wrench Set
- Wire Stripper & Cutter
- Computer with Arduino IDE Installed
Below is the wiring diagram for the project. It shows how the components are connected to the Arduino Nano, the motor driver (DRV8833), and the Bluetooth module (HC-05):
- D10 → IN4
- D9 → IN3
- D5 → IN1
- D6 → IN2
- OUT1, OUT2 → Motor 1 & 2
- OUT3, OUT4 → Motor 3 & 4
- GND → GND
- VCC → VCC
- RX → TX
- TX → RX
- GND → GND
- VCC → VCC
- D12 → Servo Motor Signal Pin
- VCC, GND → Servo Power
- The OLED Display is connected using the standard I2C pins on the Arduino Nano (A4 → SDA, A5 → SCL).
- The 7.4V LiPo battery is used to power the entire system via the Arduino Nano's VIN pin.
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Install Arduino IDE: You can download the Arduino IDE from here.
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Install the Necessary Libraries:
Servo.hfor controlling the servo motor.Wire.hfor I2C communication (OLED Display).Adafruit_SSD1306.hfor controlling the OLED Display.
You can install these libraries from the Arduino Library Manager.
To begin working on the project, first, clone this repository to your local machine:
git clone https://github.com/aphla001/KABANDHA.GIT
cd KABANDHA- Connect your Arduino Nano to your computer via USB.
- Open the Arduino IDE and navigate to
File > Open, then select the.inofile from the cloned repository. - Select your Board: From
Tools > Board, choose Arduino Nano. - Select the Processor: Choose ATmega328P (Old Bootloader) from
Tools > Processor. - Select the Port: Go to
Tools > Portand select the port where your Arduino Nano is connected. - Upload the Code: Click the Upload button in the Arduino IDE to upload the sketch.
- Make sure the correct board and port are selected in the Arduino IDE.
- Ensure that all the connections are correct as per the circuit diagram.
- Use a fresh LiPo battery for stable power supply.
- Check your wiring for loose connections if the robot does not move as expected.
Once the robot is assembled and working, you can modify the code to change its behavior, control how the arm moves, or add different display outputs to the OLED. Additionally, you can:
- Modify the Bluetooth commands to control KABANDHA remotely.
- Add sensors (ultrasonic, light, etc.) for more interactivity.
This project is licensed under the MIT License - see the LICENSE file for details.
Inspired by The Yantracharya, this project brings together the world of mythology and microcontrollers in a fun and engaging way.