Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control a DC motor and a servo motor using an Arduino UNO. The circuit also includes an ultrasonic sensor for obstacle detection and a motor driver for controlling the DC motors. The power is supplied by a 18650 battery in a holder.

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. DC Motor

   • Description: A simple DC motor.
   • Pins: pin 1, pin 2

3. 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

4. 18650 in Holder

   • Description: A battery holder for a 18650 lithium-ion battery.
   • Pins: GND, VCC

5. HC-SR04 Ultrasonic Sensor

   • Description: An ultrasonic sensor for distance measurement.
   • Pins: VCC, TRIG, ECHO, GND

6. Tower Pro SG90 Servo

   • Description: A small servo motor.
   • Pins: Signal, +5V, GND

Wiring Details

Arduino UNO

• 5V connected to:

  • +5V of Tower Pro SG90 Servo
  • 12V of L298N DC Motor Driver
  • VCC of 18650 in Holder
  • VCC of HC-SR04 Ultrasonic Sensor

• GND connected to:

  • GND of L298N DC Motor Driver
  • GND of 18650 in Holder
  • GND of HC-SR04 Ultrasonic Sensor
  • GND of Tower Pro SG90 Servo

• D10 connected to:

  • Signal of Tower Pro SG90 Servo

• D9 connected to:

  • TRIG of HC-SR04 Ultrasonic Sensor

• D8 connected to:

  • ECHO of HC-SR04 Ultrasonic Sensor

• D7 connected to:

  • IN1 of L298N DC Motor Driver

• D6 connected to:

  • IN2 of L298N DC Motor Driver

• D5 connected to:

  • IN3 of L298N DC Motor Driver

• D4 connected to:

  • IN4 of L298N DC Motor Driver

DC Motor 1

• pin 1 connected to:

  • OUT4 of L298N DC Motor Driver

• pin 2 connected to:

  • OUT3 of L298N DC Motor Driver

DC Motor 2

• pin 1 connected to:

  • OUT1 of L298N DC Motor Driver

• pin 2 connected to:

  • OUT2 of L298N DC Motor Driver

L298N DC Motor Driver

• 12V connected to:

  • 5V of Arduino UNO

• GND connected to:

  • GND of Arduino UNO

• IN1 connected to:

  • D7 of Arduino UNO

• IN2 connected to:

  • D6 of Arduino UNO

• IN3 connected to:

  • D5 of Arduino UNO

• IN4 connected to:

  • D4 of Arduino UNO

18650 in Holder

• VCC connected to:

  • 5V of Arduino UNO

• GND connected to:

  • GND of Arduino UNO

HC-SR04 Ultrasonic Sensor

• VCC connected to:

  • 5V of Arduino UNO

• GND connected to:

  • GND of Arduino UNO

• TRIG connected to:

  • D9 of Arduino UNO

• ECHO connected to:

  • D8 of Arduino UNO

Tower Pro SG90 Servo

• +5V connected to:

  • 5V of Arduino UNO

• GND connected to:

  • GND of Arduino UNO

• Signal connected to:

  • D10 of Arduino UNO

Code Documentation

// Arduino: 1.8.19 (Windows Store 1.8.57.0) (Windows 10), Board: "Arduino Uno"

// The sketch name had to be modified.
// Sketch names must start with a letter or number, followed by letters,
// numbers, dashes, dots and underscores. Maximum length is 63 characters.

// my_car_project:2:13: error: expected constructor, destructor, or type conversion before 'Avoiding'
// * Obstacle Avoiding Car
// ^~~~~~~~

// In file included from C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\libraries\Servo\src/Servo.h:63:0,
// from C:\Users\DELL\Desktop\my_car_project\my_car_project.ino:8:

// C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\libraries\Servo\src/avr/ServoTimers.h:57:41: error: 'timer16_Sequence_t' does not name a type
// typedef enum { _timer1, _Nbr_16timers } timer16_Sequence_t;
// ^~~~~~~~~~~~~~~~~~

// exit status 1

// expected constructor, destructor, or type conversion before 'Avoiding'

// This report would have more information with
// "Show verbose output during compilation"
// option enabled in File -> Preferences.