Instructables user randomrofi decided to add an LED matrix to their bag after being inspired by content found on YouTube and shared the build process:
Not only did this DIY project provide a fun and engaging experience, but it also granted me the joy of self-expression. Whether it’s a motivational quote or a witty remark, my backpack now becomes a canvas to share my thoughts and emotions with the world. And all of this was achieved with a mere 10-dollar investment and just two days of effort.
Every Wednesday is Wearable Wednesday here at Adafruit! We’re bringing you the blinkiest, most fashionable, innovative, and useful wearables from around the web and in our own original projects featuring our wearable Arduino-compatible platform, FLORA. Be sure to post up your wearables projects in the forums or send us a link and you might be featured here on Wearable Wednesday!