Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to interface various sensors and actuators with an Arduino UNO microcontroller. The circuit includes a USB driver circuit for a fogger atomizer, a 12V single-channel relay, a humidifier, an MQ-135 air quality sensor, a KY-015 DHT11 temperature and humidity sensor, an HC-SR04 ultrasonic sensor, two gearmotors with a corresponding L298N DC motor driver, and an MKE-M07 LCD1602 I2C display module.

Component List

USB Driver Circuit Fogger Atomizer

• Pins: +, -
• Description: Drives the fogger atomizer.

12V Single Channel Relay

• Pins: NC, COM, NO, IN, GND, VCC
• Description: Controls high power devices with Arduino's low power signals.

Humidifier

• Pins: GND, 5V
• Description: Adds moisture to the air.

MQ-135 Sensor Air Quality

• Pins: VCC, GND, A0, D0
• Description: Measures air quality.

KY-015 DHT11

• Pins: 5V, S, GND
• Description: Measures temperature and humidity.

HC-SR04 Ultrasonic Sensor

• Pins: VCC, TRIG, ECHO, GND
• Description: Measures distance using ultrasonic waves.

Gearmotor DC Wheels Right

• Pins: PIN1, PIN2
• Description: Provides motion to the right wheel.

Gearmotor DC Wheels Left

• Pins: PIN1, PIN2
• Description: Provides motion to the left wheel.

L298N DC Motor Driver

• 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
• Description: Drives DC motors with direction and speed control.

Arduino UNO

• 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
• Description: Microcontroller board based on the ATmega328P.

MKE-M07 LCD1602 I2C

• Pins: GND, 5V, SDA, SCL
• Description: Displays information to the user.

Wiring Details

USB Driver Circuit Fogger Atomizer

• + connected to 12V Single Channel Relay COM
• - connected to 12V Single Channel Relay NO and Humidifier GND

12V Single Channel Relay

• NC not connected
• COM connected to USB Driver Circuit Fogger Atomizer +
• NO connected to USB Driver Circuit Fogger Atomizer -
• IN connected to Arduino UNO D9
• GND connected to common ground
• VCC connected to common 5V

Humidifier

• 5V connected to USB Driver Circuit Fogger Atomizer +
• GND connected to USB Driver Circuit Fogger Atomizer -

MQ-135 Sensor Air Quality

• VCC connected to common 5V
• GND connected to common ground
• A0 connected to Arduino UNO A0
• D0 not connected

KY-015 DHT11

• 5V connected to common 5V
• S not connected
• GND connected to common ground

HC-SR04 Ultrasonic Sensor

• VCC connected to common 5V
• TRIG connected to Arduino UNO D3
• ECHO connected to Arduino UNO D4
• GND connected to common ground

Gearmotor DC Wheels Right

• PIN1 connected to L298N DC Motor Driver OUT3
• PIN2 connected to L298N DC Motor Driver OUT4

Gearmotor DC Wheels Left

• PIN1 connected to L298N DC Motor Driver OUT2
• PIN2 connected to L298N DC Motor Driver OUT1

L298N DC Motor Driver

• OUT1 connected to Gearmotor DC Wheels Left PIN2
• OUT2 connected to Gearmotor DC Wheels Left PIN1
• 12V not connected
• GND connected to common ground
• 5V connected to common 5V
• OUT3 connected to Gearmotor DC Wheels Right PIN1
• OUT4 connected to Gearmotor DC Wheels Right PIN2
• Remaining pins not connected or used for internal jumper settings

Arduino UNO

• 5V connected to common 5V
• GND connected to common ground
• A0 connected to MQ-135 Sensor Air Quality A0
• A4 connected to MKE-M07 LCD1602 I2C SDA
• A5 connected to MKE-M07 LCD1602 I2C SCL
• D3 connected to HC-SR04 Ultrasonic Sensor TRIG
• D4 connected to HC-SR04 Ultrasonic Sensor ECHO
• D9 connected to 12V Single Channel Relay IN
• Remaining pins not connected

MKE-M07 LCD1602 I2C

• GND connected to common ground
• 5V connected to common 5V
• SDA connected to Arduino UNO A4
• SCL connected to Arduino UNO A5

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 Notes

• The code provided for the Arduino UNO is a template with empty setup() and loop() functions. Actual implementation details need to be filled in based on the specific requirements of the circuit's operation.
• The documentation.txt file is empty and does not contain any additional information.