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.
- 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.
- Bargraph Dimensions: 10mm x 30mm ( 0.4" x 1.2")
- 7mm (0.3") thick
- Board Dimensions: 13mm x 101mm (.5" x 4")