Circuit Documentation

Summary

This circuit is designed to detect flames using an IR sensor and respond by activating motors, LEDs, and a buzzer. The system is controlled by an Arduino UNO, which processes the sensor input and drives the output components accordingly. The status is displayed on a 16x2 I2C LCD.

Component List

1. 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

2. Ponte H

   • Description: H-Bridge motor driver.
   • Pins: OUT4-Motor2, OUT3-Motor2, OUT2-Motor1, OUT1-Motor1, 5V, GND, 12V, IN3, IN1, IN2, IN4

3. IR Sensor

   • Description: Infrared sensor for flame detection.
   • Pins: out, gnd, vcc

4. LED: Two Pin (red)

   • Description: Red LED.
   • Pins: cathode, anode

5. LED: Two Pin (green)

   • Description: Green LED.
   • Pins: cathode, anode

6. Motor amarillo motorreductor hobby

   • Description: Hobby motor with gearbox.
   • Pins: vcc, GND

7. Buzzer Module

   • Description: Buzzer for sound alerts.
   • Pins: GND, Vcc, I/O

8. 16x2 I2C LCD

   • Description: 16x2 character LCD with I2C interface.
   • Pins: GND, VCC, SDA, SCL

Wiring Details

Arduino UNO

• 5V connected to:

  • Ponte H (5V)
  • IR Sensor (vcc)
  • Buzzer Module (Vcc)
  • 16x2 I2C LCD (VCC)

• GND connected to:

  • Ponte H (GND)
  • IR Sensor (gnd)
  • LED: Two Pin (red) (cathode)
  • LED: Two Pin (green) (cathode)
  • Buzzer Module (GND)
  • 16x2 I2C LCD (GND)

• D2 connected to Buzzer Module (I/O)

• D3 connected to IR Sensor (out)

• D4 connected to LED: Two Pin (green) (anode)

• D5 connected to LED: Two Pin (red) (anode)

• D6 connected to Ponte H (IN4)

• D7 connected to Ponte H (IN3)

• D8 connected to Ponte H (IN2)

• D9 connected to Ponte H (IN1)

• A4 connected to 16x2 I2C LCD (SDA)

• A5 connected to 16x2 I2C LCD (SCL)

Ponte H

• 5V connected to Arduino UNO (5V)

• GND connected to Arduino UNO (GND)

• OUT1-Motor1 connected to Motor amarillo motorreductor hobby (vcc)

• OUT2-Motor1 connected to Motor amarillo motorreductor hobby (GND)

• OUT3-Motor2 connected to Motor amarillo motorreductor hobby (GND)

• OUT4-Motor2 connected to Motor amarillo motorreductor hobby (vcc)

• IN1 connected to Arduino UNO (D9)

• IN2 connected to Arduino UNO (D8)

• IN3 connected to Arduino UNO (D7)

• IN4 connected to Arduino UNO (D6)

IR Sensor

• vcc connected to Arduino UNO (5V)

• gnd connected to Arduino UNO (GND)

• out connected to Arduino UNO (D3)

LED: Two Pin (red)

• cathode connected to Arduino UNO (GND)

• anode connected to Arduino UNO (D5)

LED: Two Pin (green)

• cathode connected to Arduino UNO (GND)

• anode connected to Arduino UNO (D4)

Motor amarillo motorreductor hobby

• vcc connected to Ponte H (OUT1-Motor1)

• GND connected to Ponte H (OUT2-Motor1)

• vcc connected to Ponte H (OUT4-Motor2)

• GND connected to Ponte H (OUT3-Motor2)

Buzzer Module

• Vcc connected to Arduino UNO (5V)

• GND connected to Arduino UNO (GND)

• I/O connected to Arduino UNO (D2)

16x2 I2C LCD

• VCC connected to Arduino UNO (5V)

• GND connected to Arduino UNO (GND)

• SDA connected to Arduino UNO (A4)

• SCL connected to Arduino UNO (A5)

Code Documentation

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>

#define buzzer 2
#define motor_a1 9
#define motor_a2 8
#define motor_b1 7
#define motor_b2 6
#define LED_red 5
#define LED_green 4
#define flame_sensor 3

int flame_detected;

LiquidCrystal_I2C lcd(0x27, 16 , 2);

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  pinMode(buzzer, OUTPUT);
  pinMode(motor_a1, OUTPUT);
  pinMode(motor_a2, OUTPUT);
  pinMode(motor_b1, OUTPUT);
  pinMode(motor_b2, OUTPUT);
  pinMode(LED_red, OUTPUT);
  pinMode(LED_green, OUTPUT);
  pinMode(flame_sensor, INPUT);
}

void loop() {
  flame_detected = digitalRead(flame_sensor);
  
  if (flame_detected == 1) {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Flame detected");
    digitalWrite(motor_a1, 1);
    digitalWrite(motor_a2, 0);
    digitalWrite(motor_b1, 1);
    digitalWrite(motor_b2, 0);
    digitalWrite(LED_red, 1);
    digitalWrite(LED_green, 0);
    digitalWrite(buzzer, 1);
    delay(250);
    digitalWrite(buzzer, 0);
    delay(250);
  }

  else{
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("No");
    lcd.setCursor(0,1);
    lcd.print("Flame detected");
    digitalWrite(motor_a1, 0);
    digitalWrite(motor_a2, 0);
    digitalWrite(motor_b1, 0);
    digitalWrite(motor_b2, 0);
    digitalWrite(LED_green, 1);
    digitalWrite(LED_red, 0);
    digitalWrite(buzzer, 0);
    delay(250);
  }
}

This code initializes the components and continuously checks for flame detection. If a flame is detected, it activates the motors, red LED, and buzzer, and displays a message on the LCD. If no flame is detected, it stops the motors, activates the green LED, and displays a different message on the LCD.