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NOTE: The LiquidCrystal library has undergone revisions after Arduino version 0016. Thanks to Limor Fried for the rewrite to include 4-bit and 8-bit modes and more functionality. These notes refer to the version that's current as of Arduino 0017.
Other LiquidCrystal Library Examples
- Hello World - displays "hello world!" and the seconds since reset
- Blink - control of the block-style cursor
- Cursor - control of the underscore-style cursor
- Display - quickly blank the display without losing what's on it.
- Text Direction - control which way text flows from the cursor
- Autoscroll - automatically scroll new text
- Serial input - accepts serial input, displays it
- SetCursor - set the cursor position
- Scroll - scroll text left and right
Circuit
- LCD RS pin connected to digital I/O pin 12
- LCD enable pin connected to digital I/O pin 11
- LCD pins D4 - D7 connected to digital I/O pins 5 through 2, respectively
- LCD voltage and ground connected to +5V and ground
- LCD Vo pin, which controls the contrast, connected to a potentiometer. Adjust the potentiometer to get the text to display at the contrast ratio you want.
Note: This wiring diagram is different than the one for previous versions of the LiquidCrystal library. The R/W pin is connected to ground, and the Enable pin is moved over to pin 11, saving you one I/O pin for other uses.
click the image to enlarge
image developed using Fritzing. For more circuit examples, see the Fritzing project page
Schematic:
click the image to enlarge
