The K32A-B is a cape for the BeagleBone Black designed to drive WS2811 LED pixels. It has 32 local ports (fused with LED indicators) that can each drive over 700 pixels (with power injection) at 40FPS. It also has four RJ45 differential ports that can output an additional sixteen strings or eight universes of DMX. This version also provides a Real Time Clock, temperature sensors, an OLED display, and two push buttons for navigating menus on the display.
The K32A-B was designed to drive a large number of pixels for dense props like MegaTree’s and matrices. The 32 local string ports provides the ability to achieve very dense props without multiple expansions.
The 4 RJ45 ports provide additional output capabilities to allow for future expansions. Two of the ports can be configured to either drive a WS2811 pixel differential receiver board or can be configured to output four universes of DMX for each port. The other two RJ45 ports can only drive WS2811 pixels via a receiver board.
The BeagleBone can be powered by the same power supply powering the pixels. There are jumpers on the board to select either 5V or 12V power. Alternatively, the BeagleBone can be powered by it’s own barrel connector if an on-board jumper is removed.
If you are interested in a full build, please take a look at the mounting plate option. It allows a full build-out of the controller being powered by up to four power supplies to allow for maximum output.