Addressable RGB LED string

This string of 20 Red-Green-Blue LED lights is addressable via SPI interface. Each LED has an WS-2801 LED driver IC and they are daisy chained in a long string. The plan is that each column in the bubble display will have it’s own LED at the base. I can even plug more strings of 20 end-to-end to expand to 40 or 60 addressable color controlled columns.

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