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 power source, sensors for environmental monitoring, a potentiometer for analog input, an alcohol sensor, a light-dependent resistor (LDR), a soil moisture sensor, a buzzer for audio signaling, and an LCD display for visual output. The Arduino UNO serves as the central processing unit, reading sensor data, controlling the buzzer, and managing the display.

Component List

9V Battery

• Description: Provides power to the circuit.

Resistor (200 Ohms)

• Description: Limits current to protect connected components.

Arduino UNO

• Description: Microcontroller board based on the ATmega328P, used for controlling the circuit.

Potentiometer

• Description: Provides variable resistance, used as an analog input device.

DHT22

• Description: Digital temperature and humidity sensor.

MQ-3 Sensor Alcohol

• Description: Gas sensor for detecting alcohol levels.

LCD Display 20x4

• Description: Alphanumeric liquid crystal display for showing information.

Sensor LDR LM393

• Description: Light-dependent resistor module for detecting light intensity.

YL-69 Sonda

• Description: Soil moisture sensor.

Buzzer

• Description: Audio signaling device.

Wiring Details

9V Battery

• - connected to the ground net.
• + connected to the positive voltage net.

Resistor (200 Ohms)

• pin1 connected to the LCD Display 20x4 LEDA pin.
• pin2 connected to the positive voltage net.

Arduino UNO

• GND connected to the ground net.
• 5V connected to the positive voltage net.
• Digital and analog pins connected to various components for control and data acquisition.

Potentiometer

• GND connected to the ground net.
• Output connected to Arduino UNO A2 and LCD Display 20x4 VO.
• VCC connected to the positive voltage net.

DHT22

• + connected to the positive voltage net.
• Out connected to Arduino UNO D3.
• - connected to the ground net.

MQ-3 Sensor Alcohol

• VCC connected to the positive voltage net.
• GND connected to the ground net.
• A0 connected to Arduino UNO A0.
• D0 connected to Arduino UNO D2.

LCD Display 20x4

• VDD and VSS connected to the positive voltage net and ground net, respectively.
• LEDK connected to the ground net.
• LEDA connected to Resistor (200 Ohms) pin1.
• DB0 to DB7 connected to Arduino UNO D8, D9, D10, D11, D12, D13, and two unassigned pins, respectively.
• RS connected to Arduino UNO D8.
• E connected to Arduino UNO D7.
• RW connected to the positive voltage net.
• VO connected to Potentiometer Output.

Sensor LDR LM393

• A0 connected to Arduino UNO A1.
• D0 connected to Arduino UNO D4.
• GND connected to the ground net.
• VCC connected to the positive voltage net.

YL-69 Sonda

• + connected to the positive voltage net.
• - connected to the ground net.

Buzzer

• PIN connected to Arduino UNO D5.
• GND connected to the ground net.

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 (documentation.txt)

No additional code documentation provided.