Find code and diagrams at:

I2C Control Boards allow you to connect an LCD Display to your Arduino using only 4 wires.

Note: I2C is an Addressable Communication Protocol. 0x27 should be the default address of the display. If this does not work you will have to find the address by running a sketch designed to find I2C address on an Arduino:


New Liquid Crystal Library –
Liquid Crystal I2C Library –

Functional Parts in the Project:

Arduino Uno –
20 x 4 I2C LCD Screen –
560 Piece Jumper Wire Kit –


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