Arduino LCD Example

Arduino uno with 1602 LCD screen

This small post shows a simple example of an interfacing of Arduino UNO board with LCD screen.
The Arduino can easily control LCDs equipped with the Hitachi HD44780 or compliant controller using its LiquidCrystal library which makes this interfacing is one of the easiest Arduino projects. The link below has more details about this library:
https://www.arduino.cc/en/Reference/LiquidCrystal

Hardware Required:

  • Arduino UNO board
  • 1602 LCD screen
  • 10K ohm variable resistor
  • 330 ohm resistor
  • Jumper wires

Interfacing Arduino UNO with LCD circuit:

Arduino LCD interfacing circuit

The LCD is connected with the Arduino through 6 pins: RS (register seect), E (enable), D4, D5, D6 and D7 (serial data pins). The A (anode) and K (cathode) are backlight LED pins which gives light to our LCD, it is connected to +5V through 330 ohm resistor.

The Code:

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