Datasheet

Solder 'em!

Bi-Color 8x8 LED Backpack Firmware

We wrote a basic library to help you work with the bi-color 8x8 matrix backpack. The library is written for the Arduino

and will work with any Arduino as it just uses the I2C pins. The code is very portable and can be easily adapted to any

I2C-capable micro.

Wiring to the matrix is really easy

Connect CLK to the I2C clock - on Arduino UNO thats Analog #5, on the Leonardo its Digital #3, on the Mega its

digital #21

Connect DAT to the I2C data - on Arduino UNO thats Analog #4, on the Leonardo its Digital #2, on the Mega its

digital #20

Connect GND to common ground

Connect VCC+ to power - 5V is best but 3V also seems to work for 3V microcontrollers.

Next, download the Adafruit LED Backpack library from github (https://adafru.it/aLI) . To download click the

DOWNLOADS button in the top right corner, rename the uncompressed folder Adafruit_LEDBackpack. Check that

the Adafruit_LEDBackpack folder contains Adafruit_LEDBackpack.cpp and Adafruit_LEDBackpack.h Place

the Adafruit_LEDBackpack library folder your

arduinosketchfolder

/libraries/ folder. You may need to create

the

libraries

subfolder if its your first library. You'll also need to download the Adafruit GFX

library (https://adafru.it/aJa) that provides the graphics drawing routines. Restart the IDE.

Once you've restarted you should be able to select the File->Examples->Adafruit_LEDBackpack->bicolor88 example

sketch. Upload it to your Arduino as usual. You should see a basic test program that goes through a bunch of different

drawing routines