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Arduino UNO Bluetooth-Controlled LED with HC-05 Module

Image of Arduino UNO Bluetooth-Controlled LED with HC-05 Module

Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller, an HC-05 Bluetooth module, a red LED, and two resistors. The Arduino UNO serves as the central controller, interfacing with the Bluetooth module for wireless communication and controlling the LED through a resistor to limit current.

Component List

Arduino UNO

  • Description: A microcontroller board based on the ATmega328P.
  • 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
  • Purpose in Circuit: Central controller for the circuit.

HC-05 Bluetooth Module

  • Description: A Bluetooth module for wireless communication.
  • Pins: Key, VCC, GND, TXD, RXD, State
  • Purpose in Circuit: Enables wireless communication with the Arduino UNO.

Resistor (200 Ohms)

  • Description: A resistor with a resistance of 200 Ohms.
  • Pins: pin1, pin2
  • Purpose in Circuit: Current limiting for the LED.

Resistor (220 Ohms)

  • Description: A resistor with a resistance of 220 Ohms.
  • Pins: pin1, pin2
  • Purpose in Circuit: Current limiting for the LED.

LED: Two Pin (red)

  • Description: A red LED.
  • Pins: cathode, anode
  • Purpose in Circuit: Visual indicator controlled by the Arduino UNO.

Wiring Details

Arduino UNO

  • GND is connected to the cathode of the LED.
  • D13 is connected to pin1 of the 220 Ohm resistor.
  • 5V is connected to VCC of the HC-05 Bluetooth Module.
  • GND is connected to GND of the HC-05 Bluetooth Module.
  • D1 is connected to RXD of the HC-05 Bluetooth Module.
  • D0 is connected to TXD of the HC-05 Bluetooth Module.

HC-05 Bluetooth Module

  • VCC is connected to 5V of the Arduino UNO.
  • GND is connected to GND of the Arduino UNO.
  • RXD is connected to D1 of the Arduino UNO.
  • TXD is connected to D0 of the Arduino UNO.

Resistor (220 Ohms)

  • pin1 is connected to D13 of the Arduino UNO.
  • pin2 is connected to the anode of the LED.

LED: Two Pin (red)

  • cathode is connected to GND of the Arduino UNO.
  • anode is connected to pin2 of the 220 Ohm resistor.

Documented Code

sketch.ino

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

}

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

}

documentation.txt