Quick introduction 16*2 LCD 

 LCD means Liquid Crystal Display. We use LCD technology everyday in Watches, digicode
display, and so on . Look around you, and check these small or great LCDs. There exist two big families of  LCD display:

   *    Character LCD is based on a matrix of characters (columns x rows)
   *    Graphical LCD , is based on a pixel matrix


We can find a lot of printed circuit boards that include an LCD and the connectors to interface them with Arduino and other systems for cheap ,  nowadays.


There is now a library included in the Arduino Core that is really easy to use. Its name is Liquid Crystal,  and it works with all LCD displays that are compatible with the Hitachi HD44780 Driver. This driver is really common .

Hitachi developed it as a very dedicated driver,    that includes a micro-controller itself, specifically to driver alphanumeric characters LCDs  and to connect to the external world easily too, which can be done by a specific link using, usually, 16 connectors, including power supply for the external circuit itself and the backlight supply too:


                                                                                                                                                                                                                                         16 *2 character LCD

We are going to write it and display some messages on it










Its investigate another popular method of displaying text and symbols, the LCD (Liquid Crystal
Display). LCDs are the displays typically used in calculators and alarm clocks. Many Arduino projects
involve LCDs, so it’s essential that you know how to use them. LCD displays require driver chips to
control them; these are built into the display. The most popular type of driver chip is the Hitachi
HD44780 (or compatible).
Creating projects based around LCD displays is nice and easy thanks to an array of readily available
LCD code libraries. The Arduino IDE comes with a library called LiquidCrystal.h that has a great list of features. You will be using this one in your projects.






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