Circuit Documentation

Summary

This circuit involves an Arduino Nano microcontroller, a 4-channel relay module, an HC-05 Bluetooth module, and various other components such as AC bulbs, sockets, and a power supply. The circuit is designed to control different loads (like bulbs and sockets) through relays, which are operated by the Arduino Nano. The HC-05 Bluetooth module allows for wireless communication with the Arduino Nano.

Component List

Relay 4 Channel 5v

• Description: A relay module with 4 channels, each capable of switching high voltage loads.
• Pins: GND, IN1, IN2, IN3, IN4, VCC, COM1, COM2, COM3, COM4, NO1, NO2, NO3, NO4, NC1, NC2, NC3, NC4

Arduino Nano

• Description: A small, complete, and breadboard-friendly microcontroller board based on the ATmega328P.
• Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK

HC-05 Bluetooth Module

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

Power 220v

• Description: A 220V AC power supply.
• Pins: hot wire, neutral wire

Socket

• Description: A standard electrical socket.
• Pins: Green, Life, Neutral

AC Bulb

• Description: A standard AC bulb.
• Pins: P, N

BULB

• Description: A standard DC bulb.
• Pins: +, -

AC to DC Converter

• Description: A converter that converts 220V AC to 12V and 5V DC.
• Pins: 12v, -, 5v, live, neutral

Socket (another instance)

• Description: Another instance of a standard electrical socket.
• Pins: earth, life, neutral

Wiring Details

Relay 4 Channel 5v

• GND is connected to:

  • AC to DC Converter (-)
  • Arduino Nano (GND)
  • HC-05 Bluetooth Module (GND)

• VCC is connected to:

  • AC to DC Converter (5v)
  • Arduino Nano (5V)
  • HC-05 Bluetooth Module (VCC)

• COM1, COM2, COM3, COM4 are connected to:

  • Power 220v (hot wire)
  • AC to DC Converter (live)

• NO1 is connected to:

  • AC Bulb (P)

• NO2 is connected to:

  • BULB (+)

• NO3 is connected to:

  • Socket (Life)

• NO4 is connected to:

  • Socket (life)

Arduino Nano

• GND is connected to:

  • Relay 4 Channel 5v (GND)
  • AC to DC Converter (-)
  • HC-05 Bluetooth Module (GND)

• 5V is connected to:

  • Relay 4 Channel 5v (VCC)
  • AC to DC Converter (5v)
  • HC-05 Bluetooth Module (VCC)

• D0/RX is connected to:

  • HC-05 Bluetooth Module (TXD)

• D1/TX is connected to:

  • HC-05 Bluetooth Module (RXD)

HC-05 Bluetooth Module

• GND is connected to:

  • Relay 4 Channel 5v (GND)
  • Arduino Nano (GND)
  • AC to DC Converter (-)

• VCC is connected to:

  • Relay 4 Channel 5v (VCC)
  • Arduino Nano (5V)
  • AC to DC Converter (5v)

• TXD is connected to:

  • Arduino Nano (D0/RX)

• RXD is connected to:

  • Arduino Nano (D1/TX)

Power 220v

• hot wire is connected to:

  • Relay 4 Channel 5v (COM1, COM2, COM3, COM4)
  • AC to DC Converter (live)

• neutral wire is connected to:

  • Socket (Neutral)
  • AC Bulb (N)
  • Socket (neutral)
  • BULB (-)
  • AC to DC Converter (neutral)

Socket

• Life is connected to:

  • Relay 4 Channel 5v (NO3)

• Neutral is connected to:

  • Power 220v (neutral wire)

AC Bulb

• P is connected to:

  • Relay 4 Channel 5v (NO1)

• N is connected to:

  • Power 220v (neutral wire)

BULB

• + is connected to:

  • Relay 4 Channel 5v (NO2)

• - is connected to:

  • Power 220v (neutral wire)

AC to DC Converter

• - is connected to:

  • Relay 4 Channel 5v (GND)
  • Arduino Nano (GND)
  • HC-05 Bluetooth Module (GND)

• 5v is connected to:

  • Relay 4 Channel 5v (VCC)
  • Arduino Nano (5V)
  • HC-05 Bluetooth Module (VCC)

• live is connected to:

  • Power 220v (hot wire)
  • Relay 4 Channel 5v (COM1, COM2, COM3, COM4)

• neutral is connected to:

  • Power 220v (neutral wire)
  • Socket (neutral)
  • AC Bulb (N)
  • BULB (-)

Socket (another instance)

• life is connected to:

  • Relay 4 Channel 5v (NO4)

• neutral is connected to:

  • Power 220v (neutral wire)

Documented Code

Arduino Nano 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 documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the microcontroller.