Word Clock - 8x8, I2C Backpack Bicolour by chris.eaton

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Word Clock used to display the time in written words on an 8x8 LED Matrix in the following English configuration: Q U A R T E R C H A L F P A S T T O Z N I N E T T E N S I X L H F I V E Y B E R O G T W E L V E U H T W O N E E R T S E V E N M Uses a MAX7219 shift register to drive the matrix over SPI, and a TinyRTC over I2C to keep the time.