*1 WEEK : Basic Circuit

For this week, i start to build up the basic circuit for my project. Which is LCD. The coding for this basic circuit is from Arduino Library.

#Display LCD

/*   LiquidCrystal Library - display() and noDisplay()  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 uses the  display() and noDisplay() functions to turn on and off  the display.  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  * wiper to LCD VO pin (pin 3)  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/LiquidCrystalDisplay  */ // include the library code: #include <LiquidCrystal.h> // initialize the library with the numbers of the interface pins 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.print("AirQualityMonitor"); } void loop() {   // Turn off the display:   lcd.noDisplay();   delay(1000);   // Turn on the display:   lcd.display();   delay(3000); }

#Display LCD 2 Line

/*   LiquidCrystal Library - display() and noDisplay()  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 uses the  display() and noDisplay() functions to turn on and off  the display.  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  * wiper to LCD VO pin (pin 3)  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/LiquidCrystalDisplay  */ // include the library code: #include <LiquidCrystal.h> // initialize the library with the numbers of the interface pins 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.print("Air Qlty Monitor");   // 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("  by Adawiyah"); } void loop() {   // Turn off the display:   lcd.noDisplay();   delay(1000);   // Turn on the display:   lcd.display();   delay(3000); }