Circuit Documentation

Summary

This circuit is designed to detect the presence of a flame using a KY-026 Flame Sensor. When a flame is detected, a red LED and a buzzer are activated. If no flame is detected, a green LED is turned on. The circuit is controlled by an Arduino UNO microcontroller.

Component List

1. LED: Two Pin (red)

   • Description: A red LED used to indicate the presence of a flame.
   • Pins: Cathode, Anode

2. KY-026 Flame Sensor

   • Description: A sensor used to detect the presence of a flame.
   • Pins: A0, GND, VCC, D0

3. Arduino UNO

   • Description: A microcontroller used to control the circuit.
   • 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. LED: Two Pin (green)

   • Description: A green LED used to indicate the absence of a flame.
   • Pins: Cathode, Anode

5. Buzzer

   • Description: A buzzer used to provide an audible alert when a flame is detected.
   • Pins: PIN, GND

6. Resistor (200 Ohms)

   • Description: A resistor used to limit the current through the LEDs and buzzer.
   • Pins: Pin1, Pin2

Wiring Details

LED: Two Pin (red)

• Cathode: Connected to D5 on the Arduino UNO.
• Anode: Connected to Pin2 of a 200 Ohm resistor.
• Resistor Pin1: Connected to GND on the Arduino UNO.

KY-026 Flame Sensor

• VCC: Connected to 5V on the Arduino UNO.
• GND: Connected to GND on the Arduino UNO.
• D0: Connected to D11 on the Arduino UNO.

Arduino UNO

• 5V: Connected to VCC of the KY-026 Flame Sensor.
• GND: Connected to GND of the KY-026 Flame Sensor and Pin1 of the 200 Ohm resistors.
• D5: Connected to the Cathode of the red LED.
• D6: Connected to the Cathode of the green LED.
• D11: Connected to D0 of the KY-026 Flame Sensor.
• D12: Connected to the PIN of the buzzer.

LED: Two Pin (green)

• Cathode: Connected to D6 on the Arduino UNO.
• Anode: Connected to Pin2 of a 200 Ohm resistor.
• Resistor Pin1: Connected to GND on the Arduino UNO.

Buzzer

• PIN: Connected to D12 on the Arduino UNO.
• GND: Connected to Pin2 of a 200 Ohm resistor.
• Resistor Pin1: Connected to GND on the Arduino UNO.

Code Documentation

const int buzzerPin = 12;
const int flamePin = 11;
int Flame = HIGH;
int redled = 5;
int greenled = 6;

void setup() 
{
  pinMode(buzzerPin, OUTPUT);
  pinMode(redled, OUTPUT);
  pinMode(greenled, OUTPUT);
  pinMode(flamePin, INPUT);
  Serial.begin(9600);
}

void loop() 
{
  Flame = digitalRead(flamePin);
  if (Flame == LOW)
  {
    digitalWrite(buzzerPin, HIGH);
    digitalWrite(redled, HIGH);
    digitalWrite(greenled, LOW);
  }
  else
  {
    digitalWrite(buzzerPin, LOW);
    digitalWrite(greenled, HIGH);
    digitalWrite(redled, LOW);
  }
}

Code Explanation

• Pin Definitions:

  • buzzerPin is connected to pin 12 on the Arduino.
  • flamePin is connected to pin 11 on the Arduino.
  • redled is connected to pin 5 on the Arduino.
  • greenled is connected to pin 6 on the Arduino.

• Setup Function:

  • Sets the buzzerPin, redled, and greenled as OUTPUT.
  • Sets the flamePin as INPUT.
  • Initializes serial communication at 9600 baud rate.

• Loop Function:

  • Reads the state of the flamePin.
  • If a flame is detected (Flame == LOW), the buzzer and red LED are turned on, and the green LED is turned off.
  • If no flame is detected, the buzzer and red LED are turned off, and the green LED is turned on.