How To Interface 16x2 Liquid Crystal Display With Arduino Uno

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Sometime you need to display senser data e.g Temperature senser or data received through serial communication onto the 16x2 LCD so in this post i will explain how to interface 16x2 LCD with Arduino Uno.

First you need to know the pin description of LCD.



Note:In my LCD figure 15th and 16th pin is missing because i used the proteus software for the LCD image but in practical you can connect the 15th and 16th pin with +5V supply and ground respectively.

For code go to your Arduino IDE>File>Examples>LiquidCrystal>HelloWorld  example.In this example we use 4-bit mode of LCD in which only 4 data pins(D4,D5,D6,D7) are used. In 8-bit mode all the data pins are used. Upload this code to the board and design the circuit as given below.

Circuit Diagram





Also read: How To Interface Push Button With Arduino Uno.


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