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A Bluetooth-controlled car using Arduino involves using an Arduino microcontroller, a Bluetooth module, and a motor driver to create a remote-controlled vehicle. The user can control the car's movement using a smartphone or tablet through a Bluetooth connection and a dedicated app. The Arduino receives commands from the Bluetooth module, translates them into motor control signals, and then sends these signals to the motor driver, which in turn activates the DC motors to move the car.
Components:
Arduino: The main microcontroller, responsible for receiving commands and controlling the motor driver.
Bluetooth Module (e.g., HC-05): Facilitates wireless communication between the smartphone/tablet and the Arduino.
Motor Driver (e.g., L298N): Handles the high current needed by the DC motors and provides direction and speed control.
DC Motors: Power the wheels and provide movement for the car.
Smartphone/Tablet: The user interface for sending commands to the car via a dedicated app.
Working Principle:
The user sends commands (e.g., forward, backward, left, right) to the car via a Bluetooth-enabled smartphone/tablet app.
The Bluetooth module on the car receives these commands and transmits them to the Arduino.
The Arduino processes the commands and generates appropriate signals to control the motor driver.
The motor driver then sends signals to the DC motors, causing the car to move as directed.

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