Circuit Documentation

Summary

This circuit is designed using an Arduino Mega 2560 microcontroller to interface with various sensors and actuators. The components include a flame sensor, gas sensor, temperature sensor, buzzer, LED, relay, water pump, and servo motor. The circuit is powered by a 12V power supply, and the Arduino Mega 2560 provides the necessary control signals to the connected components.

Component List

1. Arduino Mega 2560

   • Description: A microcontroller board based on the ATmega2560.
   • Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, AREF, SDA, SCL

2. KY-026 Flame Sensor

   • Description: A sensor module for detecting flame.
   • Pins: AO, GND, VCC, DO

3. MQ-2 Gas Sensor

   • Description: A sensor module for detecting gas.
   • Pins: GND, VCC, ANALOG, Digital

4. MAX6675 Module

   • Description: A module for measuring temperature using a thermocouple.
   • Pins: GND, VCC, SCK, CS, SO, -, +

5. Buzzer

   • Description: An electronic device that emits sound.
   • Pins: PIN, GND

6. LED: Two Pin (red)

   • Description: A red LED with two pins.
   • Pins: cathode, anode

7. 2ch Relay

   • Description: A two-channel relay module.
   • Pins: NC, COM, NO, VCC, IN2, IN1, GND

8. 5V Mini Water Pump

   • Description: A small water pump operating at 5V.
   • Pins: positive pin, negative pin

9. 12V Power Supply

   • Description: A power supply providing 12V.
   • Pins: +, -

10. MG90S Servo Motor

    • Description: A small servo motor.
    • Pins: SIG, VCC, GND

Wiring Details

Arduino Mega 2560

• 5V connected to:

  • KY-026 Flame Sensor (VCC)
  • MAX6675 Module (VCC)
  • MQ-2 Gas Sensor (VCC)
  • 2ch Relay (VCC)

• GND connected to:

  • KY-026 Flame Sensor (GND)
  • MAX6675 Module (GND)
  • MQ-2 Gas Sensor (GND)
  • Buzzer (GND)
  • LED: Two Pin (red) (cathode)
  • 2ch Relay (GND)

• A1 connected to:

  • MQ-2 Gas Sensor (ANALOG)

• A2 connected to:

  • KY-026 Flame Sensor (AO)

• D3 PWM connected to:

  • MAX6675 Module (SCK)

• D4 PWM connected to:

  • MAX6675 Module (SO)

• D5 PWM connected to:

  • MAX6675 Module (CS)

• D6 PWM connected to:

  • KY-026 Flame Sensor (DO)

• D7 PWM connected to:

  • MQ-2 Gas Sensor (Digital)

• D8 PWM connected to:

  • LED: Two Pin (red) (anode)

• D9 PWM connected to:

  • MG90S Servo Motor (SIG)

• D11 PWM connected to:

  • Buzzer (PIN)

• D12 PWM connected to:

  • 2ch Relay (IN1)

KY-026 Flame Sensor

• VCC connected to:

  • Arduino Mega 2560 (5V)

• GND connected to:

  • Arduino Mega 2560 (GND)

• AO connected to:

  • Arduino Mega 2560 (A2)

• DO connected to:

  • Arduino Mega 2560 (D6 PWM)

MQ-2 Gas Sensor

• VCC connected to:

  • Arduino Mega 2560 (5V)

• GND connected to:

  • Arduino Mega 2560 (GND)

• ANALOG connected to:

  • Arduino Mega 2560 (A1)

• Digital connected to:

  • Arduino Mega 2560 (D7 PWM)

MAX6675 Module

• VCC connected to:

  • Arduino Mega 2560 (5V)

• GND connected to:

  • Arduino Mega 2560 (GND)

• SCK connected to:

  • Arduino Mega 2560 (D3 PWM)

• SO connected to:

  • Arduino Mega 2560 (D4 PWM)

• CS connected to:

  • Arduino Mega 2560 (D5 PWM)

Buzzer

• PIN connected to:

  • Arduino Mega 2560 (D11 PWM)

• GND connected to:

  • Arduino Mega 2560 (GND)

LED: Two Pin (red)

• anode connected to:

  • Arduino Mega 2560 (D8 PWM)

• cathode connected to:

  • Arduino Mega 2560 (GND)

2ch Relay

• VCC connected to:

  • Arduino Mega 2560 (5V)

• GND connected to:

  • Arduino Mega 2560 (GND)

• IN1 connected to:

  • Arduino Mega 2560 (D12 PWM)

• COM connected to:

  • 12V Power Supply (+)

5V Mini Water Pump

• positive pin connected to:

  • 12V Power Supply (+)

• negative pin connected to:

  • 12V Power Supply (-)

12V Power Supply

• + connected to:

  • 5V Mini Water Pump (positive pin)
  • MG90S Servo Motor (VCC)
  • 2ch Relay (COM)

• - connected to:

  • 5V Mini Water Pump (negative pin)
  • MG90S Servo Motor (GND)

MG90S Servo Motor

• SIG connected to:

  • Arduino Mega 2560 (D9 PWM)

• VCC connected to:

  • 12V Power Supply (+)

• GND connected to:

  • 12V Power Supply (-)

Documented Code

sketch.ino

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

}

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

}

documentation.txt