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arduino-bluetooth-joystick-car-e2e770-en.md

Wireless Driving: Bluetooth RC Car

The Bluetooth Joystick Car completely replaces the bulky, traditional Radio Control (RC) transmitter. By pairing an HC-05 module with your smartphone's Bluetooth, you can drive your DIY rover using an on-screen virtual joystick.

obstacle_avoiding_car_chassis_1772704596677.png

Translating X/Y to Tank Steering

Unlike a real car with a steering wheel, most robot kits use Skid Steering (like a tank). The Arduino must translate the joystick's X/Y coordinates into motor commands.

  1. Joystick Forward (Y > 0): Both Left and Right motors spin forward.
  2. Joystick Left (X < 0): The Left motor spins backward, the Right motor spins forward. The car spins in place to the left!
  3. The App: Apps like "Arduino Bluetooth Controller" handle the phone-side math. When you move the joystick to the top-left, the app sends a specific string (like <FL>) which the Arduino parses using Serial.read().

Required Parts

  • Arduino Uno/Nano: The processor.
  • L298N Motor Driver: Crucial for handling the high current of 4 DC motors.
  • HC-05 or HC-06 Bluetooth Module: The receiver.
  • 4WD Robot Chassis Kit: Includes the acrylic base, 4 yellow gear motors, and wheels.
  • 18650 Li-ion Batteries (x2): Standard AA batteries die too quickly when powering four motors.

This project is the perfect gateway into mechatronics and mobile robotics!

ข้อมูล Frontmatter ดั้งเดิม 

title: "Arduino Bluetooth Joystick Car"
description: "Drive from your phone! Build a 4-wheel drive RC car that receives steering and throttle commands from a smartphone via Bluetooth."
category: "Motors & Robotics"
difficulty: "Intermediate"