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4-wheeled-bluetooth-controlled-rc-car-0c9c29-en.md

Heavy Duty Rover: 4WD Bluetooth Car

A 2-wheel drive robot falls over easily and struggles on grass. The 4-Wheeled Bluetooth RC Car is an upgrade in traction, power management, and programming logic, giving you a tough remote-control chassis.

obstacle_avoiding_car_chassis_1772704596677.png

Parallel Motor Wiring

The L298N motor driver only has two main outputs (Motor A and Motor B). But you have four motors!

  1. The Bridge: You wire the front-left and rear-left motors together perfectly in parallel to the "Motor A" terminal block.
  2. You wire the front-right and rear-right motors to the "Motor B" block.
  3. The Logic: Treating the entire left side acting as one massive track, and the right side acting as the second track (Skid Steering).

Bluetooth Serial State Machine

The code structure uses specific characters to dictate movement combinations passed from the Android app:

  • F = Forward (Motor A Forward, Motor B Forward).
  • B = Reverse (Motor A Reverse, Motor B Reverse).
  • L = Left Turn (Motor A Reverse, Motor B Forward).
  • S = Stop All (Motor A STOP, Motor B STOP).

Essential Parts

  • Arduino Uno: The processor.
  • L298N Motor Driver Board: The absolutely critical middle-man capable of outputting the massive amperage required.
  • HC-05 or HC-06 Bluetooth Receiver.
  • 4WD DIY Kit: Includes the acrylic plates and the four T-geared DC motors.
  • Dual 18650 Li-ion batteries: High discharge rate batteries are required to combat the stall current of four active motors.

ข้อมูล Frontmatter ดั้งเดิม 

title: "4 Wheeled Bluetooth Controlled Rc Car"
description: "Four-wheel drive traction! Build a rugged rover using an L298N driver to power four DC motors through rough terrain via smartphone control."
category: "Motors & Robotics"
difficulty: "Intermediate"