Arduino Nano Controlled Bluetooth Relay for LED Lighting

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Circuit Documentation

Summary

This circuit integrates an Arduino Nano microcontroller with an HC-05 Bluetooth module, a 12V single-channel relay, a 12V 200Ah battery, and an LED bulb. The Arduino Nano serves as the central processing unit, interfacing with the HC-05 for Bluetooth connectivity. The relay is used to control the power to the LED bulb, which is powered by the 12V battery. The circuit is designed to allow wireless control of the LED bulb through Bluetooth communication.

Component List

Arduino Nano

Microcontroller board based on the ATmega328P
Offers a variety of digital and analog I/O pins
Can be powered via USB or an external power supply

HC-05 Bluetooth Module

Bluetooth module for serial communication
Can be used to add Bluetooth capability to the Arduino
Operates at 3.3V logic level

12V Single Channel Relay

Electromechanical switch with one normally closed (NC) and one normally open (NO) contact
Controlled by an input signal (IN)
Used to switch higher power circuits using low power signals from a microcontroller

12V 200Ah Battery

High-capacity battery providing a 12V power source
Used to power the relay and the LED bulb

LED Bulb AC / Bombillo AC

Light-emitting diode bulb designed for AC power
Used as the load in the circuit, controlled by the relay

Wiring Details

Arduino Nano

GND connected to the ground pins of the HC-05 and the relay
5V output connected to the VCC pins of the HC-05 and the relay
D0/RX connected to the TXD pin of the HC-05
D1/TX connected to the RXD pin of the HC-05
D7 connected to the EN pin of the HC-05
A1 connected to the IN pin of the relay

HC-05 Bluetooth Module

GND connected to the ground of the Arduino Nano
VCC connected to the 5V output of the Arduino Nano
TXD connected to the D0/RX pin of the Arduino Nano
RXD connected to the D1/TX pin of the Arduino Nano
EN connected to the D7 pin of the Arduino Nano

12V Single Channel Relay

GND connected to the ground of the Arduino Nano
VCC connected to the 5V output of the Arduino Nano
IN connected to the A1 pin of the Arduino Nano
NC connected to the "+" pin of the LED bulb
COM connected to the "12V" pin of the battery

12V 200Ah Battery

12V connected to the COM pin of the relay
GND connected to the "-" pin of the LED bulb

LED Bulb AC / Bombillo AC

+ connected to the NC pin of the relay
- connected to the GND of the battery

Documented Code

Arduino Nano - sketch.ino

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

}

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

}

Arduino Nano - documentation.txt

(No additional documentation provided for this file)

This concludes the documentation for the given circuit. The code provided is a template and does not contain any functional logic for controlling the relay or interfacing with the HC-05 Bluetooth module. Additional code would be required to implement the desired functionality.