A Liquid Crystal display is connected as follows. D12, D11, D5 - D2 pins as shown in the figure above corresponds to pins 12, 11, 5 - 4 pins on the Arduino. For the VEE pin, a 10KOhm potentiometer can be used instead. For a 16-pin LCD, the A pin is connected to 5v while the K pin is connected to GND. It is optional to connect the A and K pins as they are used for the backlight of the LCD.
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