What's better than a single LED? Lots of LEDs! A fun way to make a small linear display is to use two 12-bar Bi-color bar-graphs.
However, this LED bargraph is 'multiplexed' - so to control all the 48 LEDs you need a lot of pins. Wouldn't it be awesome if you could control a colorful bargraph without tons of wiring? That's where this adorable LED bar-graph backpack comes in.
The backpack uses a driver chip that does all the heavy lifting for you:
- It has a built in clock so it can multiplex the display.
- It uses constant-current drivers for ultra-bright, consistent color, 1/16 step display dimming, all via a simple I2C interface.
- The backpack comes with address-selection jumpers so you can connect up to eight of these bar-graphs on a single I2C bus. You can also mix-and-match the bar-graph breakout with our other types of I2C LED backpacks.
The product kit comes with:
- A fully tested and assembled LED backpack stick
- Two 12-bar bi-color bar-graphs
- 4-pin header
A bit of soldering is required to attach the matrix onto the backpack but its very easy to do and only takes about 5 minutes.
Adafruit have provided a detailed tutorial showing you how to solder, wire and control the display. They even wrote a library for the backpacks so you can get running in under half an hour, displaying images on the matrix or numbers on the 7-segment.
If you've been eyeing matrix displays but hesitated because of the complexity, this is the solution you've been looking for!
We no longer stock this product
It's sad to say goodbye but sometimes we have to retire products to make way for new things.
You may still be able to buy this product directly from our friends at Adafruit - check out their website!