Bluetooth-Controlled Arduino Car
A car built on an Arduino platform, controlled wirelessly over Bluetooth using a mobile app — covering motor drivers, wireless comms, and basic control logic. This page documents the circuit, the components that went into it, and the build photos.
Overview
This build pairs an Arduino Uno with an HC-05 Bluetooth module so the car can be driven from a phone app over a serial Bluetooth link. Commands sent from the app are read by the Arduino and translated into forward, reverse, left, and right signals for the motor driver.
Components Used
Arduino Uno
Main controller — reads Bluetooth commands and drives the motor control logic.
Bluetooth Module (HC-05)
Receives commands from a paired phone over serial Bluetooth and passes them to the Arduino.
L298N Motor Driver
Switches higher current to the drive motors than the Arduino's pins can supply directly.
BO Motors ×4
Drive the wheels; direction and speed are set by the motor driver's control pins.
Li-ion Battery
Powers the motors and Arduino independently for untethered driving.
LEDs
Used for headlights and status indication on the car.