Description
Adafruit Bi-Color (Red/Green) 24-Bar Bargraph w/I2C Backpack Kit
These LEDS are 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 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. This backpack pairs perfectly with our 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.
