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Arduino UNO Controlled Bluetooth and Ultrasonic Sensor-Based DC Motor System

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Circuit Documentation

Summary

This circuit is designed to control two DC motors using an L298N motor driver, an Arduino UNO, and various sensors and modules. The circuit includes an MPU-6050 accelerometer and gyroscope, an HC-SR04 ultrasonic sensor, an HC-05 Bluetooth module, and a two-pin LED. The power is supplied by two 18650 Li-ion batteries. The Arduino UNO serves as the main microcontroller, interfacing with all the components and executing the control logic.

Component List

  1. L298N DC Motor Driver

    • Description: Motor driver for controlling two DC motors.
    • 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

  2. DC Motor (x2)

    • Description: Standard DC motor.
    • Pins: pin 1, pin 2

  3. Arduino UNO

    • Description: 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

  4. MPU-6050

    • Description: Accelerometer and gyroscope sensor.
    • Pins: VCC, GND, SCL, SDA, XDA, XCL, AD0, INT

  5. 18650 Li-ion Battery (x2)

    • Description: Rechargeable lithium-ion battery.
    • Pins: +, -

  6. Motor Switch (Reverse, Stop, Forward)

    • Description: Switch for controlling motor direction.
    • Pins: IN+, IN-, OUT+, OUT-

  7. HC-SR04 Ultrasonic Sensor

    • Description: Ultrasonic distance sensor.
    • Pins: VCC, TRIG, ECHO, GND

  8. Resistor

    • Description: 200 Ohms resistor.
    • Pins: pin1, pin2

  9. LED: Two Pin (Red)

    • Description: Standard red LED.
    • Pins: cathode, anode

  10. HC-05 Bluetooth Module

    • Description: Bluetooth module for wireless communication.
    • Pins: Key, VCC, TXD, RXD, State, GND

Wiring Details

L298N DC Motor Driver

DC Motor 1

DC Motor 2

Arduino UNO

MPU-6050

18650 Li-ion Battery

Motor Switch (Reverse, Stop, Forward)

HC-SR04 Ultrasonic Sensor

Resistor

LED: Two Pin (Red)

HC-05 Bluetooth Module

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)