2 LiquidCrystal Library - Hello World
4 Demonstrates the use a 16x2 LCD display. The LiquidCrystal
5 library works with all LCD displays that are compatible with the
6 Hitachi HD44780 driver. There are many of them out there, and you
7 can usually tell them by the 16-pin interface.
9 This sketch prints "Hello World!" to the LCD
13 * LCD RS pin to digital pin 12
14 * LCD Enable pin to digital pin 11
15 * LCD D4 pin to digital pin 5
16 * LCD D5 pin to digital pin 4
17 * LCD D6 pin to digital pin 3
18 * LCD D7 pin to digital pin 2
19 * LCD R/W pin to ground
21 * ends to +5V and ground
22 * wiper to LCD VO pin (pin 3)
24 Library originally added 18 Apr 2008
26 library modified 5 Jul 2009
27 by Limor Fried (http://www.ladyada.net)
28 example added 9 Jul 2009
33 This example code is in the public domain.
35 http://www.arduino.cc/en/Tutorial/LiquidCrystal
38 // include the library code:
39 #include <LiquidCrystal.h>
41 // initialize the library with the numbers of the interface pins
42 LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
45 // set up the LCD's number of columns and rows:
47 // Print a message to the LCD.
48 lcd.print("Schermo LCD a 4righe per 20 caratteri. Funziona anche bene.");
52 // set the cursor to column 0, line 1
53 // (note: line 1 is the second row, since counting begins with 0):
55 // print the number of seconds since reset:
56 //lcd.print(millis()/1000);