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LCD INTERFACE WITH ARDUINO (ATMEGA328P)

LCD INTERFACE WITH ARDUINO

 

πŸ’‘ LCD Interface with Arduino – Short Note

Overview:

An LCD (Liquid Crystal Display) is commonly used with Arduino to display text, sensor readings, or messages. The most widely used model is the 16Γ—2 LCD, which can show 2 lines with 16 characters each.

βš™οΈ Required Components:

  • Arduino Uno

  • 16Γ—2 LCD display

  • 10kΞ© potentiometer (for contrast control)

  • Breadboard and jumper wires

 

πŸ”Œ Circuit Diagram:

 

 

  • LCD PinConnect To
    VSSGND
    VDD5V
    V0Center pin of 10k pot (contrast)
    RSArduino pin 12
    RWGND
    EArduino pin 11
    D4-D7Arduino pins 5, 4, 3, 2
    A (LED+)5V (through 220Ξ© resistor)
    K (LEDβˆ’)GND

 

πŸ“ Sample Arduino Code:

#include <LiquidCrystal.h>

// Initialize the LCD (RS, E, D4, D5, D6, D7)
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
lcd.begin(16, 2); // Set LCD size to 16 columns and 2 rows
lcd.print(“HI , HELLO”); // Print message to LCD
}

void loop() {
lcd.noDisplay(); // Turn off the display
delay(500); // Wait for 0.5 seconds

lcd.display(); // Turn the display back on
delay(500); // Wait for 0.5 seconds
}

🧠 Key Points:

 

  • lcd.begin(16, 2) sets the display size.

  • lcd.print() displays text.

  • You can use lcd.setCursor(col, row) to move the cursor before printing.

 

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