We wanted to make it easy for people to add LCDs to their projects, so we devised this shield that lets you control a 16x2 character LCD, up to 3 backlight LEDs (red, green, blue) AND 5 keypad buttons using only the two I2C pins on the Arduino. You don't really lose those two pins either, since you can share the bus with I2C-based sensors, realtime clocks, etc. This is a super slick way to add a display without all the wiring hassle.
| Product Link: | http://www.adafruit.com/products/714 |
| Libraries: | https://github.com/adafruit/Adafruit-RGB-LCD-Shield-Library |
| Tutorial: | http://learn.adafruit.com/rgb-lcd-shield |
Plug-and-Play Compatible Boards
The LCD Shield is tested and fully compatible with the following boards:-
Arduino Uno (all revisions)
- Arduino Leonardo
- Arduino Mega 2560 R3 (not R2 or earlier, see below)
- Arduino Mega ADK
-
Arduino Duemilanove and Diecimila (all revisions)
- Arduino Due (using latest library)
-
Adafruit Menta
Incompatible or Partially-Compatible Boards
This shield may work with other boards with some additional steps:
Arduino Mega 2560 R2
- Add jumper wire from SDA or Analog Pin 4 on shield to pin 20 on Mega board.
- Add jumper wire from SCL or Analog Pin 5 on shield to pin 21 on Mega board.
Pin and Address Reference
The shield uses the following pins:- +5V
- GND
- SDA and SCL (on boards that have these pins)
- Analog pins 4 and 5 (see notes below)
Do not use Analog pins 4 or 5 with your project in combination with this shield, even on Arduino boards that use different pins for I²C communication (Leonardo, Mega, Due). For compatibility with “classic” (pre-R3) Arduino boards, the shield connects SDA and SCL to Analog pins 4 and 5, respectively; communication and analog readings would mutually interfere. Leonardo users should likewise avoid Digital pins 2 and 3 when using I²C.
Untested Boards and Other Notes
-
Arduino Mega 1280: compatibility is likely similar to the Mega 2560 R2; extra jumper wires would be required.
-
Arduino NG or older: possibly compatible, memory constraints permitting.
If you have specific experience with this shield on the above boards or others, please use the Feedback & Corrections link at left. Thanks!
If experiencing trouble with a board listed as “compatible,” review the introduction for tips and visit the Adafruit Forums for assistance.
If experiencing trouble with a board listed as “compatible,” review the introduction for tips and visit the Adafruit Forums for assistance.
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