Datasheet

Arduino Wiring - R3 and later

Connect:

D -> SDA

C -> SCL

+ -> 5v

- -> GND

IO -> jumper to + for 5v.

Arduino Due and Other 3.3v

Processors

Connect:

D -> SDA

C -> SCL

+ -> 5v

- -> GND

IO -> 3.3v

Arduino "Classic" Wiring

Connect:

D -> Analog-4 or Digital 20 for the Mega

C -> Analog-5 or Digital 21 for the Mega

+ -> 5v

- -> GND

IO -> jumper to + for 5v.

OK, now on to the firmware!

Seven-Segment Backpack Firmware

Our 7-segment backpack library makes it easy to program these displays. 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.

You can 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.

If you need help with installing you libraries, we have a detailed guide here: