LCD (16 cols, 2 rows)

LCD (Liquid Crystal Display)

This took a while to get working, as the examples and tutorials weren't clear on one important pin.
As you can see, I've soldered all the outputs to the cables that came with my kit.
Note that the 5th pin from the left is coloured red, but should be black.
Note that I have soldered all 8 data pins, but only 4 are needed in the tutorial sketch.

Wired up.

The sensitivity of the potentiometer is surprisingly critical.
Note how my pin 5 (cable accidentally red instead of black) indeed goes to GND. I've since replaced it with the correct black colour to avoid my future confusion.
The text is blurred because it's scrolling.

   Note: This is the tutorial from the arduino site, http://arduino.cc/en/Tutorial/LiquidCrystal, with a couple of quick mods to what is 
   actually printed out.
   /*
  LiquidCrystal Library - Hello World
 
 Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
 library works with all LCD displays that are compatible with the 
 Hitachi HD44780 driver. There are many of them out there, and you
 can usually tell them by the 16-pin interface.
 
 This sketch prints "Hello World!" to the LCD
 and shows the time.
 
  The circuit:
 * 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 R/W pin to ground
 * 10K resistor:
 *             ends to +5V and ground
 *             middle wiper pin to LCD VO pin (pin 3)
 *             NOTE HOW SENSITIVE THIS VALUE IS
 Library originally added 18 Apr 2008 by David A. Mellis
 library modified 5 Jul 2009 by Limor Fried (http://www.ladyada.net)
 example added 9 Jul 2009 by Tom Igoe
 modified 22 Nov 2010 by Tom Igoe
 
 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/LiquidCrystal
 */

// include the library code:
#include < LiquidCrystal.h >

// initialize the library with the numbers of the interface pins
// See http://arduino.cc/en/Reference/LiquidCrystalConstructor for what these numbers mean
LiquidCrystal lcd(12, 11, 5,4,3,2);

void setup() {

  // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // Print a message to the LCD.
  lcd.setCursor(0, 0);
  lcd.print("hello, world!");
  lcd.setCursor(0, 1);
  lcd.print("hello, world!");
  
  Serial.begin(9600);
}

void loop() {
    // Print a message to the LCD.
  lcd.setCursor(0, 0);
  lcd.print("hello, world!");
  lcd.setCursor(0, 1);
  lcd.print("hello, world!");
  // set the cursor to column 0, line 1
  // (note: line 1 is the second row, since counting begins with 0):
  lcd.setCursor(0, 1);
  // print the number of seconds since reset:
  lcd.print(millis()/1000);
  Serial.print("Hello");
  delay(1000);
}

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LCD (16 cols, 2 rows)