Want to know more about this Project Visit my website link below https://www.electronicsisfun08.in/2022/12/how-to-make-long-range-android.html
Hello Friends.. I made a Mobile Phone Controlled Car. I have designed the Android Mobile Application. This car can be controlled by mobile application. It is a project which can be used by Engineering students or school going students to show it to their teachers. If you like this project respect it. Give me suggestions so I can improve it or any feedback you want to give to my YouTube channel. link is : https://studio.youtube.com/channel/UCaXI2PcsTlH5g0et67kdD6g Also you can give me suggestions on "What I made next project.?"
Project Perspective
Android Mobile Controlled Bluetooth RC Car is a fundamental and innovative wireless robot project. By utilizing the essential building blocks—the HC-05 Bluetooth module and two DC motors—you'll learn how to navigate and explore your home using specialized software logic and a robust wireless setup.
Technical Implementation: Mobile and 2WD Driving
The project reveals the hidden layers of simple wireless robotics:
- Wireless Interface layer: The HC-05 Bluetooth Module acts as the bridge to your smartphone, allowing your car to receive commands wirelessly.
- Communication layer: The HC-05 communicates with the Arduino using the UART protocol (RX/TX) and sends 1-byte character commands (e.g., 'F', 'B', 'L', 'R').
- Actuation layer: An L298N Motor Driver Module provides the high current needed to drive the motors from a low-voltage Arduino signal.
- Sequential Motion Loop: The Arduino code uses two
digitalWrite()oranalogWrite()signals to drive either the "Right" or "Left" motors at different speeds. - Mobility layer: Two DC Motors with Gearbox provide the physical movement and orientation for each of your robot's travels.
Hardware Infrastructure
- Arduino Uno: The "brain" of the project, managing the serial Bluetooth commands and coordinating the locomotion and steering tasks.
- HC-05 Bluetooth Module: Providing contactless and reliable wireless monitoring for each your mobile commands.
- L298N Motor Driver: Effectively handles the 12V power required to drive your motor coils while protecting the Arduino.
- DC Motors: Providing the physical movement and orientation for each your robot's travels.
- 2WD Robot Chassis: The physical frame that houses the Arduino, motor driver, and battery pack.
- 7.4V Li-Po Battery: Essential for providing the power needed to keep your robot portable and self-sufficient.
- Micro-USB Cable: Use to program the Arduino directly from your computer for power and code.
Locomotion and Feedback Loop
The Bluetooth RC car is designed to be very efficient:
- Initialize Hardware: Correctly seat the Bluetooth module and motor driver on your 2WD chassis and prepare each motor for mounting.
- Setup Mobile Sync: In the
setup()function, initialize the serial communication at 9600 bps for your HC-05. - Execution Loop: Connect to the robot via your smartphone's Bluetooth app and use the joystick or buttons to send instructions.
- Visual and Audio Feedback: Watch the movement update on your floor in real-time, with a celebrating buzzer or LED sound for each successful check.
Steps to make this project
- Gather Components.
- Place motors on acrylic sheet & then place wheels.
- Place Arduino and L293D motor driver module on the car.
- Stick back red lights and front white headlights.
- Stick Bluetooth module on the car.
- Do upload the code.
- Then make connections from circuit diagram.
- Take Android device, download the app from given link, then install it.
- Open Bluetooth module, connect HC-05 module, password will be 0000 or 1234.
- Switch On the car, Now open app and connect the HC-05 module and move it with the help of buttons. Your Project is ready..

Download Mobile Application : https://drive.google.com/file/d/1733wgAgGncZI_EUYwARYVEgmNIOC_0EB/view?usp=sharing
Your project is ready.. Visit my YouTube channel once and see more interesting projects. "Electronics is Fun" If you like my channel subscribe it please. link: https://studio.youtube.com/channel/UCaXI2PcsTlH5g0et67kdD6g
Future Expansion
- OLED Identity Dashboard Integration: Add a small OLED display on your robot's head to show a larger life bar and your "Reality Index" for each your movement command.
- Multi-sensor Climate Sync Synchronization: Connect several more sensors (e.g., an ultrasonic sensor) to have your RC car automatically "dodge" obstacles while you're driving.
- Cloud Interface Registration Support: Add a specialized cloud dashboard to precisely control and track your robot's journey from your smartphone over WiFi.
- Advanced Velocity Profile Customization Support: Add an IR receiver and a remote control as a backup manual control system for your RC car.
Android Mobile Controlled Bluetooth RC Car is a perfect project for any electronics enthusiast looking for a more interactive and engaging robotics tool!