Circuit Documentation

Summary

This circuit integrates various components controlled by an Arduino UNO microcontroller. It includes a Bluetooth module for wireless communication, a relay shield for controlling high-power devices, a flame sensor for detecting fire or flame presence, an I2C LCD screen for display, a piezo buzzer for audio alerts, and multiple power supplies for different voltage requirements. The circuit is designed to monitor environmental conditions and control devices accordingly.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

HC-05 Bluetooth Module

• Wireless communication module that allows for Bluetooth connectivity
• It has pins for key, power (VCC), transmit (TXD), receive (RXD), state, and ground (GND).

8-Channel 5V Relay Shield

• A module that allows an Arduino board to control high power loads
• It has 8 channels with individual inputs and a common VCC and GND.

KY-026 Flame Sensor

• A sensor module designed to detect fire or flame presence
• It has analog output (A0), digital output (D0), power (VCC), and ground (GND) pins.

BULB

• An electric light source
• It has two terminals: positive (+) and negative (-).

AC Supply

• Provides alternating current power
• It has two terminals: positive (+ve) and negative (-ve).

40 Fan 12V

• A 12V fan for cooling purposes
• It has two terminals: positive (+12V) and negative (-12V).

9V Battery

• A power source providing 9 volts of DC power
• It has two terminals: positive (+) and negative (-).

I2C LCD 16x2 Screen

• A liquid crystal display capable of showing 16 characters per 2 lines
• It has pins for I2C communication (SCL, SDA), power (VCC, GND), and other control pins.

Piezo Buzzer

• An electronic device that produces sound
• It has two pins: pin 1 and pin 2.

USB Power

• A power source that provides power through a USB interface
• It has two terminals: positive (+) and negative (-).

Wiring Details

Arduino UNO

• 5V: Connected to VCC of HC-05, Relay Shield, Flame Sensor, and I2C LCD Screen
• GND: Connected to GND of Flame Sensor, I2C LCD Screen, Piezo Buzzer, HC-05, and Relay Shield
• A3: Connected to A0 of Flame Sensor
• A4: Connected to SDA of I2C LCD Screen
• A5: Connected to SCL of I2C LCD Screen
• D13: Connected to IN1 of Relay Shield
• D12: Connected to IN2 of Relay Shield
• D11: Connected to IN3 of Relay Shield
• D10: Connected to IN4 of Relay Shield
• D9: Connected to IN5 of Relay Shield
• D8: Connected to pin 1 of Piezo Buzzer
• D1: Connected to RXD of HC-05
• D0: Connected to TXD of HC-05

HC-05 Bluetooth Module

• VCC: Powered by 5V from Arduino UNO
• GND: Connected to GND on Arduino UNO
• TXD: Connected to D0 on Arduino UNO
• RXD: Connected to D1 on Arduino UNO

8-Channel 5V Relay Shield

• VCC: Powered by 5V from Arduino UNO
• GND: Connected to GND on Arduino UNO
• IN1 - IN5: Controlled by D13 - D9 on Arduino UNO
• K2-On: Connected to + of Bulb
• K1-On: Connected to + of another Bulb
• K1-Off, K2-Off: Connected to +ve of AC Supplies
• K3-On, K4-On: Connected to + of Bulb and +12V of 40 Fan 12V respectively
• K3-Off, K4-Off: Connected to +ve of AC Supply and + of 9V Battery respectively
• K5-On: Connected to +12V of another 40 Fan 12V
• K5-Off: Connected to + of another 9V Battery

KY-026 Flame Sensor

• VCC: Powered by 5V from Arduino UNO
• GND: Connected to GND on Arduino UNO
• A0: Connected to A3 on Arduino UNO

I2C LCD 16x2 Screen

• VCC (5V): Powered by 5V from Arduino UNO
• GND: Connected to GND on Arduino UNO
• SDA: Connected to A4 on Arduino UNO
• SCL: Connected to A5 on Arduino UNO

Piezo Buzzer

• Pin 1: Controlled by D8 on Arduino UNO
• Pin 2: Connected to GND on Arduino UNO

BULB

• +: Connected to K2-On, K1-On, and K3-On on Relay Shield
• -: Connected to -ve of AC Supplies

AC Supply

• +ve: Connected to K1-Off, K2-Off, K3-Off on Relay Shield
• -ve: Connected to - of Bulbs

40 Fan 12V

• +12V: Controlled by K4-On and K5-On on Relay Shield
• -12V: Connected to - of 9V Batteries

9V Battery

• +: Connected to K4-Off and K5-Off on Relay Shield
• -: Connected to -12V of 40 Fans 12V

Documented Code

Arduino UNO - sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Arduino UNO - documentation.txt

(No additional documentation provided)