Arduino - LCD (Liquid Crystal Display)

Arduino - LCD (Liquid Crystal Display)

This article will give you an example of how to use Arduino board with 16x2 Liquid Crystal LCD (16 characters in 2 lines). Examples applications, Arduino boards send text or output from sensor to show on LCD screen.

LCD pin

• LCD RS pin       to digital pin 12
• LCD Enable pin to digital pin 11
• LCD D4 pin       to digital pin 5
• LCD D5 pin       to digital pin 4
• LCD D6 pin       to digital pin 3
• LCD D7 pin       to digital pin 2
• LCD Vo pin       to Output from potentiometer 10k Ohm for adjust the contrast of the character.
• LCD Anode       to resistor 220 Ohm for power the backlight of the display
• LCD Cathode    to GND

Example Program

#include <LiquidCrystal.h>
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.print("hello, world!");
}

void loop() {
  // set the cursor to column 0, line 1
  lcd.setCursor(0, 1);
  // print the number of seconds since reset:
  lcd.print(millis() / 1000);
}

Output this program

* If LCD not show characters try adjust the potentiometer 

Referent 

- https://www.arduino.cc/en/Tutorial/HelloWorld