Adafruit LED backpacks make it incredibly simple to add small bitmapped displays to a project. Each requires just four wires: power, ground and two communication lines to a microcontroller.
Two common questions we receive:
- How can I use more than one 8x8 matrix backpack in an Arduino sketch?
- Can I have two (or more) matrices always showing the same image?
This tutorial demonstrates both.
Last updated on 2015-03-05 at 08.30.17 AM
Published on 2012-10-13 at 09.58.40 AM
We’ve had spooky Halloween displays on the brain lately, but the concepts here are equally applicable to more benign concepts!