Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller, an L298N DC motor driver, a 9V battery, a DC motor, an MQ-5 gas sensor, and a Micro servo 9G. The circuit is designed to control a DC motor and a servo motor, and to read data from a gas sensor.

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. L298N DC Motor Driver

   • Description: A dual H-bridge motor driver that allows control of two DC motors.
   • 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

3. 9V Battery

   • Description: A standard 9V battery used to power the circuit.
   • Pins: -, +

4. DC Motor

   • Description: A simple DC motor.
   • Pins: positive, negative

5. MQ-5 Gas Sensor

   • Description: A gas sensor module that detects LPG, natural gas, and coal gas.
   • Pins: VCC, GND, Digi Out, Analog out

6. Micro Servo 9G

   • Description: A small servo motor used for precise control of angular position.
   • Pins: GND, +5V, PWM

Wiring Details

Arduino UNO

• 5V connected to:

  • Micro servo 9G (+5V)
  • MQ-5 Gas Sensor (VCC)

• GND connected to:

  • MQ-5 Gas Sensor (GND)
  • Micro servo 9G (GND)
  • L298N DC Motor Driver (GND)
  • 9V Battery (-)

• A0 connected to:

  • MQ-5 Gas Sensor (Analog out)

• D13 connected to:

  • MQ-5 Gas Sensor (Digi Out)

• D11 connected to:

  • L298N DC Motor Driver (IN1)

• D10 connected to:

  • L298N DC Motor Driver (IN2)

• D9 connected to:

  • L298N DC Motor Driver (ENA)

• D6 connected to:

  • Micro servo 9G (PWM)

L298N DC Motor Driver

• OUT1 connected to:

  • DC Motor (positive)

• OUT2 connected to:

  • DC Motor (negative)

• 5V connected to:

  • 9V Battery (+)

9V Battery

• - connected to:

  • Arduino UNO (GND)
  • L298N DC Motor Driver (GND)

• + connected to:

  • L298N DC Motor Driver (5V)

DC Motor

• positive connected to:

  • L298N DC Motor Driver (OUT1)

• negative connected to:

  • L298N DC Motor Driver (OUT2)

MQ-5 Gas Sensor

• VCC connected to:

  • Arduino UNO (5V)

• GND connected to:

  • Arduino UNO (GND)

• Analog out connected to:

  • Arduino UNO (A0)

• Digi Out connected to:

  • Arduino UNO (D13)

Micro Servo 9G

• GND connected to:

  • Arduino UNO (GND)

• +5V connected to:

  • Arduino UNO (5V)

• PWM connected to:

  • Arduino UNO (D6)

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 document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and documented code.