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Arduino UNO Controlled LCD Interface with Bluetooth Connectivity and DC Fan Regulation

Image of Arduino UNO Controlled LCD Interface with Bluetooth Connectivity and DC Fan Regulation

Circuit Documentation

Summary

The circuit in question appears to be a microcontroller-based system with various peripherals including a 16X2 LCD display, a power supply, a power transformer, resistors, a rocker switch, an AC supply, a 12v DC fan, a potentiometer, a diode, an N-Channel MOSFET, an LED, a ground reference, an HC-05 Bluetooth module, and a piezo speaker. The microcontroller used is an Arduino UNO, which interfaces with the LCD, Bluetooth module, and piezo speaker, and controls an LED and a DC fan through a MOSFET. The power supply is managed by a transformer and a switch, and the voltage levels for the LCD are adjusted using a potentiometer.

Component List

Power Supply

  • Provides the required DC voltage to the circuit.

Power Transformer

  • Steps down or steps up the AC voltage.

1k Ohms Resistor

  • Limits current or divides voltage in the circuit.

16X2 LCD

  • A display module for showing information.

Arduino UNO

  • The main microcontroller board for controlling the circuit.

Rocker Switch

  • A mechanical switch to control the power flow.

AC Supply

  • The source of AC voltage for the circuit.

12v DC Fan

  • A fan that operates on 12V DC power.

Potentiometer

  • A variable resistor used to adjust voltage levels.

Diode

  • Allows current to flow in one direction, preventing reverse current flow.

N-Channel MOSFET IRFZ44N

  • A type of transistor used for switching electronic signals.

LED

  • A light-emitting diode used as an indicator.

HC-05 Bluetooth Module

  • A module for wireless communication via Bluetooth.

Piezo Speaker

  • An electronic device that emits sound when an electric signal is applied.

GND (Ground)

  • A common reference point for the electrical potential in the circuit.

Wiring Details

Power Supply

  • Connected to the Arduino UNO's Vin pin.
  • Provides power to the 16X2 LCD (VDD), Potentiometer (VCC), and HC-05 Bluetooth Module (VCC).

Power Transformer

  • Primary connected to the AC Supply and Rocker Switch.
  • Secondary connected to the Power Supply.

1k Ohms Resistor

  • One resistor is connected between the Arduino UNO's D13 pin and an LED.
  • Another is connected to the 16X2 LCD's A pin for backlight control.
  • The third is connected to the gate of the N-Channel MOSFET.

16X2 LCD

  • Data pins D4-D7 are connected to Arduino UNO's D9-D12.
  • Control pins RS and E are connected to Arduino UNO's D7 and D8.
  • V0 is connected to the Potentiometer's output for contrast control.
  • VSS, K, and RW are connected to ground.

Arduino UNO

  • Powers the 16X2 LCD, Potentiometer, and HC-05 Bluetooth Module.
  • Interfaces with the 16X2 LCD, HC-05 Bluetooth Module, and Piezo Speaker.
  • Controls the LED and 12v DC Fan through GPIO pins.

Rocker Switch

  • Controls the connection between the AC Supply and the Power Transformer.

AC Supply

  • Provides AC voltage to the Power Transformer.

12v DC Fan

  • Connected to the N-Channel MOSFET for control.

Potentiometer

  • Adjusts the contrast of the 16X2 LCD.

Diode

  • Connected in series with the 12v DC Fan for protection.

N-Channel MOSFET IRFZ44N

  • Controls the 12v DC Fan.
  • Source connected to ground, drain connected to the fan, and gate connected to a 1k Ohms Resistor.

LED

  • Connected to the Arduino UNO's D13 pin through a 1k Ohms Resistor.

HC-05 Bluetooth Module

  • RXD and TXD are connected to the Arduino UNO's D0 and D1 for serial communication.

Piezo Speaker

  • Connected to the Arduino UNO's D3 pin.

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.