LCD stands for Liquid Crystal Display .The LCD can display messages in two lines with 16 characters each. It can display all the letters of alphabet, Greek letters, punctuation marks, mathematical symbols etc. It is also possible to display symbols made up by the user. Other useful features include automatic message shift (left and right), cursor appearance, LED backlight etc. It has got 16 pins in total and can be used in two modes 4 bit and 8 bit. Since the GPIO pins in Raspberry Pi is limited to 6 ,we will interface LCD in 4 bit mode.For info on how to interface visit
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