Arduino and LCDs

1/*
2  LiquidCrystal Library - Hello World
3 
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.
8 
9 This sketch prints   "Hello World!" to the LCD
10 and shows the time.
11 
12  The circuit:
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
20 * 10K resistor:
21 * ends to +5V   and ground
22 * wiper to LCD VO pin (pin 3)
23 
24 Library originally added 18 Apr   2008
25 by David A. Mellis
26 library modified 5 Jul 2009
27 by Limor Fried (http://www.ladyada.net)
28   example added 9 Jul 2009
29 by Tom Igoe
30 modified 22 Nov 2010
31 by Tom Igoe
32 
33   This example code is in the public domain.
34
35 http://www.arduino.cc/en/Tutorial/LiquidCrystal
36   */
37
38// include the library code:
39#include 
40
41// initialize the library with   the numbers of the interface pins
42LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
43
44void   setup() {
45  // set up the LCD's number of columns and rows:
46  lcd.begin(16, 2);
47   // Print a message to the LCD.
48  lcd.print("hello, world!");
49}
50
51void loop()   {
52  // set the cursor to column 0, line 1
53  // (note: line 1 is the second row,   since counting begins with 0):
54  lcd.setCursor(0, 1);
55  // print the number of   seconds since reset:
56  lcd.print(millis()/1000);
57}

1/*
2  LiquidCrystal Library - Hello World
3 
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.
8 
9 This sketch prints  "Hello World!" to the LCD
10 and shows the time.
11 
12  The circuit:
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
20 * 10K resistor:
21 * ends to +5V  and ground
22 * wiper to LCD VO pin (pin 3)
23 
24 Library originally added 18 Apr  2008
25 by David A. Mellis
26 library modified 5 Jul 2009
27 by Limor Fried (http://www.ladyada.net)
28  example added 9 Jul 2009
29 by Tom Igoe
30 modified 22 Nov 2010
31 by Tom Igoe
32 
33  This example code is in the public domain.
34
35 http://www.arduino.cc/en/Tutorial/LiquidCrystal
36  */
37
38// include the library code:
39#include 
40
41// initialize the library with  the numbers of the interface pins
42LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
43
44void  setup() {
45  // set up the LCD's number of columns and rows:
46  lcd.begin(16, 2);
47  // Print a message to the LCD.
48  lcd.print("hello, world!");
49}
50
51void loop()  {
52  // set the cursor to column 0, line 1
53  // (note: line 1 is the second row,  since counting begins with 0):
54  lcd.setCursor(0, 1);
55  // print the number of  seconds since reset:
56  lcd.print(millis()/1000);
57}