Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as an Arduino UNO, HC-05 Bluetooth Module, L298N DC motor driver, MQ2 gas sensor, buzzer, battery, motors, ESP32-CAM, rocker switch, and multiple micro servos. The circuit is designed to interface these components to perform specific tasks, with the Arduino UNO acting as the central microcontroller.

Component List

HC-05 Bluetooth Module

• Description: Bluetooth module for wireless communication.
• Pins: Key, VCC, GND, TXD, RXD, State

L298N DC Motor Driver

• Description: Dual H-Bridge motor driver for controlling 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

MQ2 Gas Sensor

• Description: Gas sensor for detecting various gases.
• Pins: VCC, GND, AOUT, DOUT

Buzzer

• Description: Audio signaling device.
• Pins: PIN, GND

Battery 12V

• Description: Power source for the circuit.
• Pins: +, -

Motor and Wheels

• Description: DC motors with attached wheels.
• Pins: vcc, GND

ESP32-CAM

• Description: Camera module with Wi-Fi and Bluetooth capabilities.
• Pins: 5V, GND, IO12, IO13, IO15, IO14, IO2, IO4, VOT, VOR, VCC, IO0, IO16, 3V3

Rocker Switch

• Description: On/Off switch.
• Pins: output, input

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

Micro Servo 9G

• Description: Small servo motor for precise control.
• Pins: GND, +5V, PWM

Wiring Details

HC-05 Bluetooth Module

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• TXD connected to D0 of Arduino UNO
• RXD connected to D1 of Arduino UNO

L298N DC Motor Driver

• 5V connected to 5V of Arduino UNO
• GND connected to GND of battery
• 12V connected to output of rocker switch
• OUT1 connected to GND of motor and wheels
• OUT2 connected to vcc of motor and wheels
• OUT3 connected to vcc of motor and wheels
• OUT4 connected to GND of motor and wheels
• ENA connected to IO12 of ESP32-CAM
• ENB connected to IO12 of ESP32-CAM
• IN1 connected to IO13 of ESP32-CAM
• IN2 connected to IO15 of ESP32-CAM
• IN3 connected to IO14 of ESP32-CAM
• IN4 connected to IO2 of ESP32-CAM

MQ2 Gas Sensor

• VCC connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• AOUT connected to A5 of Arduino UNO

Buzzer

• PIN connected to D10 of Arduino UNO
• GND connected to GND of Arduino UNO

Battery 12V

• + connected to input of rocker switch
• - connected to GND of L298N DC motor driver

Motor and Wheels

• vcc connected to OUT2 and OUT3 of L298N DC motor driver
• GND connected to OUT1 and OUT4 of L298N DC motor driver

ESP32-CAM

• 5V connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• IO12 connected to ENA and ENB of L298N DC motor driver
• IO13 connected to IN1 of L298N DC motor driver
• IO15 connected to IN2 of L298N DC motor driver
• IO14 connected to IN3 of L298N DC motor driver
• IO2 connected to IN4 of L298N DC motor driver

Rocker Switch

• output connected to 12V of L298N DC motor driver
• input connected to + of battery

Arduino UNO

• 5V connected to 5V of various components
• GND connected to GND of various components
• A5 connected to AOUT of MQ2 gas sensor
• D10 connected to PIN of buzzer
• D5 connected to PWM of Micro Servo 9G
• D4 connected to PWM of Micro Servo 9G
• D3 connected to PWM of Micro Servo 9G
• D2 connected to PWM of Micro Servo 9G
• D1 connected to RXD of HC-05 Bluetooth Module
• D0 connected to TXD of HC-05 Bluetooth Module

Micro Servo 9G

• +5V connected to 5V of Arduino UNO
• GND connected to GND of Arduino UNO
• PWM connected to D5, D4, D3, D2 of Arduino UNO

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 the components used, their wiring details, and the code for the Arduino UNO.