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Arduino UNO Bluetooth-Controlled Robotic Car with L298N Motor Driver

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Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller, motors, a motor driver, a Bluetooth module, a battery mount, and a rocker switch. The circuit is designed to control motors via Bluetooth communication and is powered by a 4 x AAA battery pack.

Component List

  1. Arduino UNO

    • Description: A microcontroller board based on the ATmega328P.
    • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0
  2. Motor amarillo motorreductor hobby

    • Description: A small DC motor with a gearbox.
    • Pins: vcc, GND
  3. Motor and wheels

    • Description: A motor with attached wheels for movement.
    • Pins: vcc, GND
  4. Rocker switch

    • Description: A switch to control the power supply.
    • Pins: output, input
  5. L298N DC motor driver

    • Description: A dual H-Bridge motor driver.
    • Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB
  6. HC-05 Bluetooth Module

    • Description: A Bluetooth module for wireless communication.
    • Pins: Key, VCC, TXD, RXD, State, GND
  7. 4 x AAA Battery Mount

    • Description: A battery holder for four AAA batteries.
    • Pins: -, +

Wiring Details

Arduino UNO

  • 3.3V connected to VCC of HC-05 Bluetooth Module
  • 5V connected to 5V of L298N DC motor driver
  • GND connected to - of 4 x AAA Battery Mount, GND of L298N DC motor driver, and GND of HC-05 Bluetooth Module
  • D1 connected to RXD of HC-05 Bluetooth Module
  • D0 connected to TXD of HC-05 Bluetooth Module

Motor amarillo motorreductor hobby

  • vcc connected to vcc of motor and wheels and OUT1 of L298N DC motor driver
  • GND connected to GND of motor and wheels and OUT2 of L298N DC motor driver

Motor and wheels

  • vcc connected to vcc of Motor amarillo motorreductor hobby and OUT1 of L298N DC motor driver
  • GND connected to GND of Motor amarillo motorreductor hobby and OUT2 of L298N DC motor driver

Rocker switch

  • output connected to 12V of L298N DC motor driver
  • input connected to + of 4 x AAA Battery Mount

L298N DC motor driver

  • 5V connected to 5V of Arduino UNO
  • GND connected to GND of Arduino UNO and - of 4 x AAA Battery Mount
  • OUT1 connected to vcc of Motor amarillo motorreductor hobby and motor and wheels
  • OUT2 connected to GND of Motor amarillo motorreductor hobby and motor and wheels
  • OUT3 connected to GND of Motor amarillo motorreductor hobby and motor and wheels
  • OUT4 connected to vcc of Motor amarillo motorreductor hobby and motor and wheels
  • 12V connected to output of Rocker switch

HC-05 Bluetooth Module

  • VCC connected to 3.3V of Arduino UNO
  • GND connected to GND of Arduino UNO
  • RXD connected to D1 of Arduino UNO
  • TXD connected to D0 of Arduino UNO

4 x AAA Battery Mount

  • - connected to GND of Arduino UNO and L298N DC motor driver
  • + connected to input of Rocker switch

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)


This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and documented code.