Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various components including a buzzer, a servo motor, an MQ-2 gas sensor, a fan, a MOSFET, and a resistor. The circuit is designed to control the fan and buzzer based on the readings from the MQ-2 sensor, and to control the servo motor.

Component List

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

Buzzer

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

Servo

• Description: A motor that can be controlled to move to a specific position.
• Pins: gnd, vcc, pulse

MQ-2

• Description: A gas sensor that detects LPG, i-butane, propane, methane, alcohol, Hydrogen, and smoke.
• Pins: GND, VCC, ANALOG, Digital

Fan

• Description: A small DC fan.
• Pins: GND, 5V

Mosfet

• Description: A type of transistor used for switching and amplifying electronic signals.
• Pins: Gate, Drain, Source

Resistor

• Description: A passive electrical component that implements electrical resistance.
• Pins: pin1, pin2
• Properties: Resistance: 200 Ohms

Wiring Details

Arduino UNO

• 5V: Connected to VCC of MQ-2, 5V of Fan, and vcc of Servo.
• GND: Connected to GND of MQ-2, gnd of Servo, GND of buzzer, and Source of Mosfet.
• D10: Connected to pin1 of Resistor.
• A0: Connected to ANALOG of MQ-2.
• D9: Connected to pulse of Servo.
• D8: Connected to PIN of buzzer.

Buzzer

• PIN: Connected to D8 of Arduino UNO.
• GND: Connected to GND of Arduino UNO.

Servo

• gnd: Connected to GND of Arduino UNO.
• vcc: Connected to 5V of Arduino UNO.
• pulse: Connected to D9 of Arduino UNO.

MQ-2

• GND: Connected to GND of Arduino UNO.
• VCC: Connected to 5V of Arduino UNO.
• ANALOG: Connected to A0 of Arduino UNO.

Fan

• GND: Connected to Drain of Mosfet.
• 5V: Connected to 5V of Arduino UNO.

Mosfet

• Gate: Connected to pin2 of Resistor.
• Drain: Connected to GND of Fan.
• Source: Connected to GND of Arduino UNO.

Resistor

• pin1: Connected to D10 of Arduino UNO.
• pin2: Connected to Gate of Mosfet.

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)

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the microcontroller.