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The RGB LED matrix described here can be used to signal feedback to the user, as for example in my MIDI Matrix with 56 Inputs and 56 Outputs. But, it can also be used for fancy stuff, Vegas mode, bling, impressing your neighbours,… The PCB is as wide as the RGB LED modules themselves, with enough space above and below for mounting holes. This means that the modules can easily be chained horizontally in order to create type crawls. If you cut off the top and bottom mounting holes along the line that is printed on the PCB then you can also create larger screens extending in two dimensions. It consists of 4 DOUT shift registers (74HC595) that feed the RGB LED display module in a matrix style. It is connected to J8/J9 of the core board. In order to access the RGB LEDs, use the BLM-X module which makes it straightforward to access single colors / single LEDs in the matrix. A fully detailed description of the project can be found in the Wiki.
