- Simple I2C interface
- Built in clock to multiplex the display
- Uses constant-current drivers for ultra-bright, consistent color
- Connect up to eight of these bar-graphs on a single I2C bus
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. There are driver chips like the MAX7219 that can help control a bar-graph/matrix for you but there's a lot of wiring to set up and they take up a ton of space. 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. This backpack pairs perfectly with Adafruit bar-graphs and manages all the LED control and multiplexing.
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.
1 - Fully tested and assembled LED backpack stick
2 - 12-bar bi-color bar-graphs
1 - 4-pin header
Bargraph Dimensions: 10mm x 30mm ( 0.4" x 1.2")
Thickness: 7mm (0.3")
Board Dimensions: 13mm x 101mm (.5" x 4")
Some soldering required.