1. Josh O’Hara jmohara@calpoly.edu Electrical Engineering Department California Polytechnic State University San Luis Obispo 1

2. 2  Create an RGB LED Matrix controller  8x8 RGB LED Matrix  Visualizer / Mood lighting  Portable / Low-power  Reprogrammable  Easy to make animations  Expandable

3. 3  SparkFun’s Serial Interface  Surface-mount SPI interface  Daisy-chain  Cannot use by itself  Operation  3x 8-bit shift registers for each color value (RGB)  Darlington pair amplifier to drive the common cathode LED matrix  SPI in / out (frame data)

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6. 6  Component / footprint libraries were created  Each component was measured  Modified MCU  Instead of ATtiny, used the ATmega328p  On-board programming header (ISP 3x2)  Modified power  L7805 5V Regulator  Filtering capacitors  Alternative power inputs (7-15V, or 5V direct)  Function Buttons  Activity / Status LEDs

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12. Thank you for your time! 12